Faulty heater.

[MikenSue]

Please can anyone offer any advice. We have a Truma Combi 6. When it is turned on, either heating or hot water it runs for about 10 mins and then switches off. Not to start again for at least 10 minutes. once it gets past say half an hour running it will work without problem. We normally run it on gas but just tried on 240v and it switched off not to start again for about half an hour. The temperature inside or outside the van does not seem to have any effect.
It has always been temperemental but now it is cutting off all the time. Can anyone offer any advice as we would love to get away in winter when possible?.

 

[Stealaway]

Don't you get any fault codes on the controller?

 

[pappajohn]

Maybe an internal overheat thermostat fault.

 

[MikenSue]

It just goes dead. Usually a click and then the heater is off with no lights. It is just dead for at least 10 minutes, sometimes up to an hour. Then works fine as though nothing was wrong. I took the van for it testing but the heater then worked perfectly. No fault codes showed.
It is a fault that has been getting more frequent.

 

[Lenny HB]

You say no fault code is that just on the display or on the boiler as well?

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[TheBig1]

it sounds like the internal fan has seized up and is allowing the truma to overheat. The overheat thermostat cuts in and wont allow the unit to restart till cooled.

 

[MikenSue]

I did not know there was a fault code on boiler or the controls. Attached, are a couple of photos of the culprits. The controls are lit when working but instantly click off and remain dead for 10 minutes and up to an hour before working perfectly again until the next time. Usually about 10 to 20 minutes. When I had it tested it worked perfectly for about 4 hours and as it hadn't shown a fault code nothing could be done. With regular use the heater does get more reliable but the fault is getting more frequent now. I've attached a couple of photos. I am hoping to go back to the garage with a couple of suggestions as to what the fault might be. Thanks.

 

[Lenny HB]

Those are the classic controls, the leds do flash under some fault conditions.
If you take the pcb cover off the boiler there are leds on the pcb that flash fault codes.