Alde heating systems come in a few different shapes but all work in much the same way. Alde systems are wet heating systems for motorhomes and caravans which while heating the habitation area also heat the potable water. If correctly installed and given a little maintenance they will usually give faultless service for many years. The most common cause for complaint is that the heating stops working even though the unit is lighting on gas and heating the potable water by electric. This usually means that air has been introduced into the system.
The heating system is a sealed system and must have no air locks in it. The air gets into the system in a number of ways. You could have a pin hole in a pipe caused by corrosion. The automatic vent valve at the boiler could be faulty. Someone has opened a bleed valve by mistake whilst the pump is running. The reservoir has been allowed to go empty.
If air has gotten into the system you have to get it out. It is possible to move the vehicle around on a hill and open a high point bleed valve and remove the air that way, however if this is not successful you will need to have the system pumped around (purged) to remove the air lock. Plus repair any faulty parts.
Price for purging the system £45
Recommended maintenance. It is recommended that the fluid in the system is changed between 3-5 years after the system is fitted and then every 2 years after that. Although most of the system is purely pipes and liquid, there are some moving parts within it that will appreciate the change in fluid and it will extend the life of the system.
Complete removal and refilling of the system. £125 including antifreeze and call out.
There are other things which occasionally go wrong with these systems for instance the electronic control boards and igniter modules but I can only quote for those on an individual basis.
