Frequently asked questions

FAQ

Check out the most frequently asked questions and answers. Whether you are curious about our products, wondering about maintenance or have technical questions, we have the answers. If you have any further questions or need more detailed information, our service team is always ready to help you.

Why is my hot water luke warm after a service?

During service the technician might have left your circulation pump on continuous mode. This mode is used for testing purposes but will deprive the hot water cylinder of heat.

Probably best to reset your Alde control panel to restore factory default settings. Refer to the operating instructions.

Why is my Alde heating gurgling after a service?

During service the technician might have left your circulation pump on speed 5 to purge air. Set it back to speed 23 for touring caravans and B and C-class motorhomes, or just under speed 4 for A-class motorhomes.

If the heating fluid was changed there may be air in your Alde system. Refer to the operating instructions.

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

Yes, use your Alde system completely as normal. No harm will result, there are no heating elements in the hot water cylinder to burn out.

What antifreeze products are Alde approved?

In the UK, they conform to Alde Approval 40X0 2024:

  • Alde Protective Premium G12++, G12evo or G13
  • Fuchs Fricofin DP
  • Comma Xstream G40
  • Volkswagen Group G12evo

(Our G13 spec products were discontinued in 2024 so new stock may not be available.)

These products are available ready-mixed with deionised water. Always read the label.

All are intermixable, magenta in colour, providing frost protection to -37 °C and 5 year corrosion protection.

There is a different list of Alde-approved antifreeze products in North America with a completely different chemical base.

What fluid do I top-up my Alde heating system with?

Use the same antifreeze product as is currently in the system.

If your heating fluid is magenta in colour, it’s very likely your system is filled with an Alde-approved antifreeze. So top-up with an approved product, they’re all intermixable.

If it is not magenta in colour it is safest to top-up with a cupful or two of deionised water. You will have slightly less protection from frost, corrosion and bacteria, but damage caused by mixing incompatible antifreeze is the bigger risk. Then change the heating fluid as soon as practicable, using an Alde-approved antifreeze product.