Alde heating system maintance in your caravan 

Frequently asked Questions.

Q. How can I check my system levels?

A. Have a visual check on the expansion tank sometimes you can see the colour if not it may require you to unscrew cap. The antifreeze level should be 1cm above the minimum mark when cold this allows expansion of the antifreeze but not to overflow.

Q. Blue or Pink? How often should the coolant be changed?

A. Generally speaking, if the antifreeze colour in the expansion tank is BLUE or GREEN then this should be changed every two years. If it’s a PINK colour then it’s every five years.

Q. What if I don’t change the fluid as recommended?

A. If the two year / five year period has elapsed, the fluid begins to degrade and loose its bacterial and rust-inhibitors and in turn heating system will start to corrode from within. Pipes become at risk of splitting or begin to degrade. Pump performance will be effected and in extreme circumstances a boiler tank or heating element failure may occur and can only be remedied by completely replacing those items. 

Q.How much hot water does the system produce?

A.The Alde Compact boilers uses a store of 8.4 litres of hot water at >50 °C. When mixed at the fixture to a usable 38 °C, this amounts to ≈12 litres of heated water every 30 mins. Cold water <10 °C will take longer to heat.

The Hot Water Boost function—the tap icon on the digital control panel—cuts out the central heating for 30 mins while another 8.4 litres of hot water is heated to >65 °C. This amounts to ≈15 litres of heated water, mixed. Assuming an average flow rate of 3 litres per minute, this gives ≈5 minutes of continuous heated water for showers.

This can also be used to kill Legionella bacteria if the system has been standing unused for a spell. (Legionella bacteria dies within 2 mins at 65 °C.)

Q. Can I operate my central heating while the fresh water is drained down?

A. Yes, you can operate the system as normal, even with fresh water drained down.

Q. How do I know if/when my coolant has been changed at the correct time intervals?

A. Unfortunately, This is not a standard service routine, hopefully your workshop would have advised you before, during or after the service that it is required and an extra charge would have been made. However, we do check your levels at the service & advice accordingly to replace the antifreeze fluid at the earliest point.

Q. I have a new caravan so when should the coolant be changed?

A. UK caravan manufacturers currently supply a 2 year coolant to their tourers so if you purchased your caravan in January 2019 or before then a coolant change is due now or over due if a long time before. From 2020 model caravans, uk manufactures now install 5 year fluid as standard. 

If unsure, please contact us for further information before you do anything

Fluid changes

We offer a full fluid change using only an Alde recommended/approved 5 year G13 specification fluid and specialist pump.

Alde Fluid Change

£ 225 from
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Alde Control Panel Upgrade

For users with an older control panel for Alde Compact 3010, they can now update to the latest model, 3010 613.An installation frame is included for those customers who upgrade from the older LCD panel 3010 213. For those upgrading from the black and white control panel 3010 413, only the vertical installation dimension of 10 mm needs adjusting.