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the blown air heating from the trumatic in our 750 has started failing . i have trawled the internet and failed to find a cure. it heats the water up fine but the fan only comes on for a few seconds then stops . after a few minutes it comes on again for a few seconds then gives up until a few hours later . has anyone had the same problem and if so how did you fix it ? . i prefer to try to fix things myself before i pay someone but i am struggling with this one.
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Although I consider that the 750 was the best model we ever owned, I am obviously wrong about the location or even existence of a remote air temperature sensor. The 700 that we owned after that did have a remote sensor above the habitation door, like a button, which I was constantly trying to press. I have recently talked to current 750 owners who suggest that the air temperature sensor may be incorporated within the temperature dials (where you select via the inner and outer dials the water only or water and heating functions plus the temperature required) and as such am unable to comment any further.
Hopefully, someone else will post here soon with a clue.
Yes you are correct in as much as it would be within the remit of a gas safe engineer to remove and inspect the unit.
There is a UK Truma helpline number which should be able to offer telephone advise with regard to your course of action.
Sorry to have led you on a wild goose chase. -
Massive fail ! …..i have searched every inch but have been unable to locate the temperature sensor despite now knowing what it looks like . am i right in thinking that to access the fans to lubricate the bearings i would have to remove the boiler completely as it is built into the back of the curved kitchen cupboard ? presumably this is a gas safe engineers job as it would be unsafe for an unqualified person such as me to do .
many thanks for your help
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My first thoughts would be is the fan free to rotate and not sticking, making strange noises etc. It may simply require lubricating around the front and rear bearings. As I remember, there are two fans, one to assist the exhaust fume extraction and a second fan for the warm air circulation. Obviously the air circulation fan is not required when heating water only.
It would also be worth checking the air temperature sensor which is normally situated above the habitation door on the main control panel. It looks like a button that does nothing, can’t be pressed, but is in fact an air temperature sensor and it is expected that air can flow freely over it. It may be clogged with fluff. Do attempt to clean it with a vacuum cleaner nozzle and while you are there hold the nozzle against the sensor for a few minutes which will have the effect of kidding it on that it is cold and see if this sparks the Trumatic into life.
In the meantime I will try to locate a fault finding flow chart for the Trumatic which may throw up some other suggestions but for the moment that is all I can think of. If any other member has had the same problem then I am sure they will be along shortly.
I note that you will be attending The Lawns. Don’t let this put you off. You could bring along a 2 kilowatt fan / oil heater if necessary, hook – up is provided. If you have not cured it before then, be assured it will be either cured, parts not required or diagnosed before you leave. Don’t pay anyone just yet.
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