FAQ

Need help quickly? Review the most common questions in our FAQ. We also provide tips on camping in winter and winter storage.

New owners

I'm missing an instruction manual. Where can I find one?

All operating and installation instructions are available to download or print in Manuals. If you don’t know which boiler model you have, try our “What boiler model do I have?” section.

In summer, how do I get hot water without central heating?

Set the desired room temperature to 4 °C below ambient on the control panel.

The central heating will cut out— the heating fluid will not be circulated so the living area will not be heated.

Hot water will still function as normal, and the central heating will cut in if the ambient temperature drops below that set.

In winter, do I need to empty fresh water?

Yes.

Unless your vehicle has a FrostControl and fresh water tank heating. Even if the central heating is left at 22 °C there might be a power cut, for example.

What general maintenance and consumables are there?

The heating fluid is a consumable and will need replacing when its protection expires. Since 2019, UK installers must use an Alde-approved product with 5-year protection from new. If in doubt, replace the heating fluid after the first 2 years.

Seasonally inspect the boiler’s flue hoses. They should be secured, undamaged, and clear of obstructions.

When in constant use, drain off and top-up the fresh water every two weeks to replenish the natural air cushion in the boiler. This can mitigate any hammering from the water pump.

Empty the fresh water over winter.

Safety inspections should be completed on schedule as required by law.

In winter, can I use my central heating even though the fresh water is drained down?

Yes, you can use your Alde heating system as normal, no harm will result as there are no electric heating elements in the hot water cylinder.

What LPG fuel systems can I use?

Metal LPG bottles are most versatile. Performance of composite bottles deteriorates more quickly than metal in extreme conditions. Fixed refillable fuel systems are fine but read the filling instructions carefully to avoid flooding your gas lines with liquid gas.

Propane or butane – what type of LPG should I use?

In the UK, use propane (red bottle) from a reputable supplier or Autogas.

Butane (blue bottle) isn’t suitable for use in temperatures below 13 °C.

Prospective buyers

What is the power output of the Alde aluminium convectors?

The convectors put out ≈400 W per metre. Doubled up, they put out ≈600 W per metre.

Can copper parts be used in the Alde heating circuit?

No.

If they shed copper particles they may cause galvanic corrosion in the Alde boiler’s aluminum glycol cylinder. Such damage won’t be covered by warranty.

The boiler’s hot water cylinder is stainless steel.

How much does an Alde system weigh compared to a forced/blown air system?

An Alde system provides both central heating and hot water rather than having two separate systems. But compared to a combined forced air and hot water system, an Alde system in a caravan will weigh about 10 kg more when full.

What caravan and/or motorhome manufacturers currently fit Alde systems?

Alde systems are fitted into a wide range of models, as shown in our European installed base.

Can I run the Alde heating system on electric only?

Yes. 12 VDC power is used for the heating controls but you need stable 230 VAC power supply for electric heating.

The Alde system can output 1, 2 or 3 kW on electric heating, selectable from the control panel. In the UK with its higher median voltage, that’s a load of roughly 4.8, 9.5 or 14.3 amps.

Bear in mind that most caravans and motorhomes have their insulation tested with gas and electric heating, so electric heating alone won’t be sufficient in all weather. (Gas heating adds another 6 kW of power.)

 

Is Alde heating system a closed or open heating system?

Alde heating system is an open system. This allows pipework and fittings to be physically thinner and lighter and the circulation pump to be quieter.

Can I run the Alde heating system when I'm off-grid?

Yes. You’ll need 12 VDC power from the leisure battery for the heating controls and propane for your 6 kW gas heating.

Can I buy products directly from Alde?

Alde distance sells to trade customers only. Contact us to setup a trade account.

All other customers can purchase from our resellers.

Customers booked in for work at the Moosewerks, our service centre at Alde in Northants, can purchase spare parts and accessories and have them fitted while they wait.

Winter storage

How do I drain down the fresh water in my Alde system?

Find your safety/drain valve. Lift the yellow toggle and water will drain out through the underside of the vehicle. Open all taps, showers, and water outlets.

If you’re draining down for winter, don’t forget to empty your grey water and black waste too.

Can I leave my Alde central heating on a frost protect setting?

Yes. There isn’t a specific “frost protect” setting but if you’re hooked up to 230 V electric power you could leave the system running on 2 kW electric heating at 5 °C on the control panel. Check regularly for signs of condensation and remember to drain down the fresh water.

But be kind to the planet; ask yourself whether you really need to heat an empty caravan or motorhome all winter?

Heating fluid

How much fluid is in the central heating system?

As a rough guide, most caravans and motorhomes hold 10–15 litres, A-class motorhomes 20 litres, boats 15–25 litres.

What type of water should I mix with concentrated antifreeze?

Deionised water. Make sure the mixing vessel is clean with no sediment at the bottom and test the heating fluid once it’s mixed. The correct ratio should measure 50% ethylene glycol, 50% water, or -35 °C on a good quality, brand name hydrometer.

Alde-approved antifreeze products are available ready to use, pre-mixed with deionised water that does not need diluting.

What should the fluid level be in the expansion tank?

About 1 cm above the Min mark when cool.

As the fluid heats up it will expand towards the Max mark.

What antifreeze should I use in my Alde heating system?

You must use an Alde-approved antifreeze product for your heating fluid.

In the UK, they are:

  1. Alde Premium G13 Antifreeze
  2. Fuchs Maintain Fricofin V50
  3. Comma XStream GG40
  4. VW Genuine Parts G13

These are all available ready to use, pre-mixed with deionised water. Always read the label.

These products all have a 5 year life. Corrosion damage caused by substandard heating fluid is not covered by warranty.

How do I change the heating fluid?

It’s best to use the British Technique, pushing the old fluid out using either the new fluid or clean water if flushing the system first.

Alde Service Partners can quote you for this work, using their Alde service pump kit and Alde-approved antifreeze. Or why not book in at the Moosewerks, Alde’s service facility in Northants.

 

How often should I replace my heating fluid?

Heating fluid using an Alde-approved antifreeze should be replaced after 5 years.

All Alde-approved antifreeze is magenta in colour. If your heating fluid is not magenta in colour, replace it as soon as practicable using an Alde-approved antifreeze product.

Corrosion damage caused by substandard heating fluid is not covered by warranty.

Questions about Compact 3000, 3010 and 3020 HE

Can I run the Alde system without heating fluid?

NO!

You will likely damage the Alde boiler beyond repair.

Whilst 12 VDC power is connected to the system it must be filled with heating fluid. Even disconnected, you should avoid leaving the system empty of heating fluid in case someone accidentally reconnects it.

What fresh water is safe to use in the Alde system?

Palatable drinking water.

Sites in Iberia and the Maghreb may use softened, shock-treated well water or desalinated seawater with high levels of bleach and/or salt that will corrode stainless steel.

It may be labelled as drinking water but if you can’t stomach it, don’t use it in the system either, unless your vehicle is equipped with at least a 4-stage RO water filter or marine watermaker.

The Alde boiler has a stainless steel hot water cylinder

How much hot water does the Alde system produce?

When mixing down to a usable temperature, 12–15 litres of heated water every 30 minutes is normal, equating to a continuous shower of 4–5 minutes with a 3 litre per minute flow rate. The system can be equipped with an Alde TMV3 to reduce wastage when mixing the water.

Cold water below 10 °C will take longer to heat.

If your Compact 3020 system is equipped with an Alde Flow module and connected to mains water, the hot water will be continuous. Take as long as you like to wash your luxuriant locks!

Why am I not getting hot water, or why isn't the water very hot?

The control panel is set for constant circulation pump operation, which means that all the power is being used to run the heating system.

Are touchscreen control panels backwards compatible?

There have been three Alde Compact boiler models: Compact 3000 (19932004), Compact 3010 (20042014), Compact 3020 (2014 to date).

None of their control panels are cross-compatible with each other.

Compact 3010 systems can all be upgraded to a touchscreen control panel with the Colour Touch Upgrade. If upgrading from the slider switch/control knob panel then the Digital Adaptor Lead is also required.

How do I programme the Night/Day Mode on the control panel?

It’s best if you imagine a 24 hour clockface.

I want the room temperature to be warm during the day but cooler when I go to bed at night

Setting control panel to Night Mode only

In this example we set desired temperature on the Main Menu to 22 °C. This is our “normal mode”. We set Night Mode to 17 °C, starting at 22:00 and ending at 06:00 when we get out of bed. At 06:00 the desired temperature will revert to the 22 °C we set on the Main Menu. We do not set Day Mode.

I go out in the morning every day and come back at tea-time

Setting control panel to Night and Day Mode

Night Mode is set as before but we also use Day Mode. We set Day Mode to 10 °C to keep off the chill, starting at 09:00 when we leave, ending 15:00 when we get back. In the times between Day and Night Mode, the desired temperature reverts to 22 °C.

Why doesn’t my programme work?

Night and Day Modes conflicting

If you set Night Mode and Day Mode to start/end at exactly the same time, they will conflict. There’s also no reason to set Night Mode and Day Mode back to back. Your programme should have an hour or so in “normal mode” between Night and Day Mode, otherwise you don’t need all three modes.

Finally, don’t forget to set the Clock.

How does the control panel work?

The instructions for your control panel and boiler should be left in your vehicle. You will find them under  > Manuals .

Try our different control panels

Quick guide for Alde Touchpanel 3010

Quick guide for Alde Touchpanel 3020 HE

How quickly should the vehicle heat up?

This varies enormously depending on the internal and external temperature, how many people are present, the design of the heating system and the vehicle’s insulation. And also depending on whether you’re just using the 230 V immersion heater (1, 2 or 3 kW) or just gas, or the immersion heater and gas together. This gives an output of anything from 1 kW to 8.7 kW. Room temperature inside the vehicle normally reaches a pleasant level within one hour if you’re using both gas and the immersion heater.

How do I get the best performance out of my heating system?

Make sure you’ve bled the heating system (it should be filled using an Alde filler pump 1900 811). Make sure that the ventilation ducts in the furniture aren’t blocked. Use maximum immersion heater and gas output while heating. Avoid taking hot water for showers, etc. until the vehicle is warm. Don’t allow the temperature in the vehicle to fall below 10 °C by day/in the evening.

Does my boiler have a 2 kW immersion heater, or a 3 kW one?

It’s impossible to tell from the control panel. You have to look at the rating plate on the boiler to find out. You’ll often find this between the exhaust gas connection and the plastic cover on the long side of the boiler. However, this only states the maximum output. Of course, the Alde Compact 3010 can be set to both 1 kW and 2 kW at the touch of a button if the vehicle is connected to a 230 V mains supply.

Pre-2013 (manufacture date), UK-spec boilers were limited to 2 kW electric heating, whilst Scandia-spec boilers had 3 kW. Some UK vendors used Scandia-spec boilers, however. This is the max power only, the Alde Compact boilers can still be set to 1 or 2 kW electric heating at the touch of a button, if 230 V mains supply is a concern. In 2013 all new boilers were produced to Scandia spec.

 

How much electrical power does the heating system use?

There are two mechanisms in the Alde Compact boilers that draw >0.1 A current from the vehicle battery. The exhaust fan venting waste gases (≈0.4 A), and the heating fluid being pumped around the circuit (≈0.2 A). So normal draw from the vehicle battery is between ≈0.2–0.6 A, including the control panel. Max draw is 1 A for approximately three seconds at system start-up.

Max draw from 230 V mains is ≈4.5 A on 1 (1 kW), ≈9 A on 2 (2.1 kW), and ≈14 A on 3 (3.2 kW).

How much LPG does the boiler use?

The burner in the boiler operates in two stages. Minor heat requirement – lowest output stage (245 g/h propane) and major heat requirement – highest output stage (405 g/h propane).

The boiler is so ingeniously designed that in the first instance it selects the immersion heaters as primary heat source if 230 V is connected to the vehicle and if the immersion heaters are activated on the control panel. If this is not enough, the LPG burner starts automatically (if this is activated in the control panel).
Electricity is often cheapest, so this heating option is the cheapest one.

Error messages Compact 3020 HE

What is "Yellow connection fail"?

High communication load on the yellow connector on the control panel.

  1. Check the cable, connectors and your vehicle’s master panel.

If the error persists, contact Alde Service Partner.

What is "Red connection fail"?

Error with the red cable between the boiler and the control panel.

  1. Check red cable between boiler and panel as well as its red contacts.
  2. Check cables connected to the boiler’s black connector, e.g. cable between AC and boiler or panel.

If the error persists, contact Alde Service Partner.

What is "Panel failure"?

Can occur if the panel has been exposed to high humidity for an extended period of time.

  1. Ensure that the panel dries up and then restart.

If the error persists, contact Alde Service Partner.

What is "No match Heater/Panel"?

The circuit board in the boiler is not intended for the Alde Compact 3020 HE and will not work with the 3020 HE panel.

Contact Alde Service Partner.

What is "Heater not found"?

There is a connection error between the boiler and control panel.

Probably a problem with the boiler’s PCB. The error may also occur due to incompatible software in the boiler and control panel.

If the error persists, contact Alde Service Partner.

What is "3rd Party Panel C.fail"?

There is a Remote Control error: The remote control connected to contact JP3 on the back of the control panel is disconnected or defective. For example, remote control can be Alde Smart Control.F

  1. Check cable and connectors.
  2. If it has been disconnected press the “uninstall” button on the control panel.
  3. Press reinstall to connect the device again.

If the error persists, contact Alde Service Partner.

What is "Fan failure"?

The combustion fan is defective.

Contact your Alde Service Partner.

What is "Gas failure"?

Ensure that gas is available to the boiler. To reset the error;

  1. break and reconnect 12 V to the boiler,
  2. after 12 V has been reconnected gas operation has to been reactivated in the Control Panel.

The error may also be due to a faulty spark generator and/or burner.

Contact Alde Service Partner if the error is not reset.

What is "Overheat PCB"?

Overheating in the boiler or boiler space. To reset the error ;

  1. Wait till the temperature in the boiler or boiler space has dropped.
  2. Break and reconnect 12 V to the boiler.

If the error persists, contact Alde Service Partner.

What is "Overheat red fail"?

Overheat protection (red cable) tripped.

This fault can arise if the boiler is run at high power at the same time as there are air pockets in the heating system, the heating system should then be bled properly, see user manual.

Also check that the fluid level in the expansion tank is at least 1 cm above the min line when cool.

If the fault remains, contact your Alde Service Partner.

What is "Overheat blue fail"?

This error can occur if the boiler is running at high effect while there are air pockets in the system.

  1. Bleed the system thoroughly, see user´s  manual.
  2. Check that the fluid level in the expansion tank is at least 1 cm over the min-line when the fluid is cold.

This can also occur if the circulation pump is broken or disconnected from the boiler.

To reset the error,

  1. The glycol temperature must drop below 41°F  (50 °C)
  2. Break and reconnect 12 V to the boiler.

If the error persists, contact Alde Service Partner.

What boiler model do I have?

Comfort 2925 Balance (1982-1984)

Product name: Comfort 2925 Balance
Year of manufacture: 1982 – 1984
Miscellaneous: The gas control (Babysit) has a grey thermostat knob and is situated in a yellow sheet-metal box. Electronic ignition when the thermostat knob is pressed down. Panel with four switches. Takes combustion air from the roof flue via a hose. Brown front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2925

Manuals for Comfort 2925

2900 Långe Jan (1973-1980)

Product name: 2900 Långe Jan
Year of manufacture: 1973 – 1980
Miscellaneous: The first ”all in one” boiler with automatic system, expansion tank and circulation pump built into a single unit. Common in Adria and SMV.

Technical data.
Height: 1680 mm
Width: 120 mm
Depth: 185 mm
Output: 5.9 kW (propane)
Gas consumption: 457 g/h (propane)

Article number: 2900

2910 Junior (1977-1983)

Product name: 2910 Junior
Year of manufacture: 1977 – 1983
Miscellaneous: Just like its predecessor, 2900, the 2910 is also an ”all in one” boiler with an automatic system, expansion tank and circulation pump built into a single unit. What distinguishes it is that the 2910 has a tubular structure. The boiler had a somewhat lower output and was therefore ideal for smaller caravans

Technical data.
Height: 1650 mm
Width: 100 mm
Depth: 200 mm
Output: 3.3 kW (propane)
Gas consumption: 255 g/h (propane)

Article number: 2910

Comfort 2920 (1979-1984)

Product name: Comfort 2920
Year of manufacture: 1979 – 1984
Miscellaneous: The gas control (Babysit) has a grey thermostat knob and ignition button. The front plates are either lacquered brown or foliated with wood structure.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.2 kW (propane)
Gas consumption: 407 g/h (propane)

Article number: 2920

Manuals for Comfort 2920

Comfort 2920 (1985-1989)

Product name: Comfort 2920
Year of manufacture: 1985 – 1989
Miscellaneous: The gas control (Eurosit) has a black thermostat knob and ignition button situated in a yellow plastic box. Brown lacquered front plates .

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2920

Manuals for Comfort 2920

Comfort 2920 (1990-2001)

Product name: Comfort 2920
Year of manufacture: 1990 – 2001
Miscellaneous: The gas control (Eurosit) has a black thermostat knob and ignition button situated in a light grey plastic box. Grey front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2920

Manuals for Comfort 2920

Comfort 2921 Automatic (1982-1984)

Product name: Comfort 2921 Automatic
Year of manufacture: 1982 – 1984
Miscellaneous: The gas control (Babysit) has a grey thermostat knob and is situated in a yellow sheet-metal box. Electronic ignition when the thermostat knob is pressed down. Panel with four switches. Brown front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2921

Manuals for Comfort 2921

Comfort 2921 Automatic (1985-1989)

Product name: Comfort 2921 Automatic
Year of manufacture: 1990 – 2001
Miscellaneous: The gas control (Eurosit) has a black thermostat knob and is situated in a light grey plastic box. Electronic ignition when the thermostat knob is pressed down. Panel with three or four switches. Grey front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2921

Manuals for Comfort 2921

Comfort 2921 Automatic (1990-2001)

Product name: Comfort 2921 Automatic
Year of manufacture: 1990 – 2001
Miscellaneous: The gas control (Eurosit) has a black thermostat knob and is situated in a light grey plastic box. Electronic ignition when the thermostat knob is pressed down. Panel with three or four switches. Grey front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2921

Manuals for Comfort 2921

Comfort 2925 Balance (1985-1989)

Product name: Comfort 2925 Balance
Year of manufacture: 1985 – 1989
Miscellaneous: The gas control (Eurosit) has a black thermostat knob and is situated in a yellow plastic box. Electronic ignition when the thermostat knob is pressed down. Panel with three or four switches. Takes combustion air from the roof flue via a hose. Brown front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2925

Manuals for Comfort 2925

Comfort 2925 Balance (1990-2001)

Product name: Comfort 2925 Balance
Year of manufacture: 1990 – 2001
Miscellaneous: The gas control (Eurosit) has a black thermostat knob and is situated in a light grey plastic box. Electronic ignition when the thermostat knob is pressed down. Panel with three or four switches. Takes combustion air from the roof flue via a hose. Grey front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2925

Manuals for Comfort 2925

Comfort 2923 Automatic (1992-2003)

Product name: Comfort 2923 Automatic
Year of manufacture: 1992 – 2003
Miscellaneous: The gas control (Eurosit) has a black thermostat knob and is situated in a light grey plastic box about 1 m from the floor. Electronic ignition when the thermostat knob is pressed down. Panel with five switches. Grey front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2923910

Manuals for Comfort 2923

Comfort 2923 (2002-2019)

Product name: Comfort 2923
Year of manufacture: 2002 – 2019
Miscellaneous: The gas control (Eurosit) has a black thermostat knob and is situated in a light grey plastic box. Electronic ignition via switch. Panel with four switches. Grey front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2923980

Manuals for Comfort 2923

Comfort 2928 Balance (1992-2003)

Product name: Comfort 2928 Automatic
Year of manufacture: 1992 – 2003
Miscellaneous: The gas control (Eurosit) has a black thermostat knob and is situated in a light grey plastic box about 1 m from the floor. Electronic ignition when the thermostat knob is pressed down. Panel with five switches. Takes combustion air from the roof flue via a hose. Grey front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2928902

Manuals for Comfort 2928

Comfort 2928 Balance (2002-2019)

Product name: Comfort 2928 Balance
Year of manufacture: 2002 – 2019
Miscellaneous: The gas control (Eurosit) has a black thermostat knob and is situated in a light grey plastic box. Electronic ignition via switch. Panel with four switches. Takes combustion air from the roof flue via a hose. Grey front plates.

Technical data.
Height: 1710 mm
Width: 132 mm
Depth: 220 mm
Output: 5.4 kW (propane)
Gas consumption: 420 g/h (propane)

Article number: 2928980

Manuals for Comfort 2928

Alde Compact 3000 (1993-2006)

Product name: Alde Compact 3000
Year of manufacture: 1992 – 2006
Miscellaneous: The first combi-boiler with both heating and hot water in the same unit. Powered by LPG or 230 V heating element or both at the same time.
In the first year, the boiler was only sold to the motorhome manufacturer Niesmann + Bischoff and had model no. 3000901.

Technical data.
Height: 300 mm
Width: 340 mm
Depth: 490 mm
Output: 4.5 kW (propane)
Gas consumption: 330 g/h (propane)

Article number: 30009301

Manuals for Alde Compact 3000

Alde Compact 3010 (2006-2014)

Product name: Alde Compact 3010
Year of manufacture: 2006 – 2014
Miscellaneous: A further development of our top selling Compact 3000. All connections for liquid and electricity moved to the boiler’s long side. Also a combi-boiler with both heating and hot water in the same unit. Powered by LPG or 230 V heating element or both at the same time. The output of the heating element has been increased to max. 3150 W. Two output stages on the LPG burner.

Technical data.
Height: 310 mm
Width: 340 mm
Depth: 490 mm
Output: 3.3 / 5.5 kW (propane)
Gas consumption: 245 / 405 g/h (propane)

Article number: 30109011

Manuals for Alde Compact 3010

Alde Compact 3020 HE (2014-)

Product name: Alde Compact 3020 HE
Year of manufacture: 2014 –
Miscellaneous: A further development of our top selling Alde Compact 3010 but with more sophisticated electronics. Most products in the heating system can be controlled directly from the boiler’s control panel. Option of fully automated climate control together with an AC.

Technical data.
Height: 310 mm
Width: 340 mm
Depth: 510 mm
Output: 3.3 / 5.5 kW (propane)
Gas consumption: 245 / 405 g/h (propane)

Article number: Alde Compact 3020 HE

Manuals for Alde Compact 3020 HE

Questions about the Comfort 292x

Can I run the Alde system without heating fluid?

NO!

You will likely damage the Alde boiler beyond repair.

Whilst 12 VDC power is connected to the system it must be filled with heating fluid. Even disconnected, you should avoid leaving the system empty of heating fluid in case someone accidentally reconnects it.

Why does the ignition spark keep striking even though the pilot light is on?

The ignition box isn’t sensing the flame, so it has to be replaced.

Why does the pilot light go out when I release the thermostat knob on the gas control?

This may be down to one of three things.

  1. The thermocouple is broken and needs to be replaced. Contact an Alde service location.
  2. The overheat protector, which comprises a fuse, has tripped. Contact an Alde service location.
  3. The pilot burner is blocked with dirt so that the flame can’t reach the thermocouple. The pilot burner has to be cleaned or replaced. Contact an Alde service location.

Is the boiler boiling?

The gas control needs to be adjusted, or the thermostat knob needs to be set or replaced. Contact an Alde service location.