Heating problems

[PJGWiltshire]

We have a 2009 Swift Kontiki 669 with the Trauma blown air heating system. I am having a few problems with the heating in that when turned on gas for blown air heating and heating water, the system heats up to a temperature set by the dial thermostat then turns itself off, all Ok one thinks. The temperature then drops and I would expect the system to kick in and heat the van up again. Alas this does not happen. It requires me to turn off the heating then turn back on and the heating works up to the set temp and then shuts down. Has anybody else experienced this issue and how was it resolved. I suspect a faulty thermostat but just asking

 

[jonandshell]

It might just be the LOCATION of the thermostat.
Some manufacturers put them in the most stupid places where they are not measuring an average air temperature.
Bad locations are above heater vents and on cold walls next to fridge compartments and the like.
Try pulling the sensor out and letting it dangle in mid air on its wires to see if it improves things before getting too worried about other problems.

 

[PJGWiltshire]

It might just be the LOCATION of the thermostat.
Some manufacturers put them in the most stupid places where they are not measuring an average air temperature.
Bad locations are above heater vents and on cold walls next to fridge compartments and the like.
Try pulling the sensor out and letting it dangle in mid air on its wires to see if it improves things before getting too worried about other problems.

Thanks its just below knee height on the bench seat as you enter the van on the left. Had the van for 6 years have not come across this problem before

 

[pappajohn]

Sounds like the thermostat to me.

Switching one way only.

And thats a stupid height for it......the recommended height for a household thermostsat is 1.5mtrs above floor level....what makes motorhomes different ?

 

[PJGWiltshire]

Sounds like the thermostat to me.

Switching one way only.

It it a cade of just buying a new stat

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[mitzimad]

knee height is not a good place for a stat usually recomended at around 5 ft high in a room cant see why a motorhome should be any different

 

[PJGWiltshire]

Working on the principle that hot air goes up I would expect the cold area to be at knee/ ankle level, thus I can see why in the van they have put it there. I think I shall replace that part and see what happens.

 

[Lenny HB]

It shouldn't turn off, once up to temp the burner should turn down to a low heat an the fan speed goes right down, you can just about feel the air coming out of the vents.
Sounds like a overheat sensor on the boiler shutting it down, could be the flue fan faulty running slow or the flue intake/outlet partly blocked not unknown for spiders to build nests in the flue outlet. Another thing to check is that most of the vents around the van are open if too many are closed can cause overheating, also make sure none of the outlet pipes have come off the heater outlets on the boiler.

 

[sdc77]

An easy test of its the thermostat is to disconnect it (it's two black push on connectors top right of the board.. Or just follow the cable..) once disconnected the heater should stay on.. If it cuts out then its possibly a overheat sensor on the unit that's faulty

 

[PJGWiltshire]

All vents are open, the heating does shut down.There is no small background fan running heat. Its a case of nothing even in the middle of the night stat set at 4or 5 (that it i want loads of heat)nothing unless I turn off and on then full blast until I turn down to number 2 then it slows down and then switches off.

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[Lenny HB]

All vents are open, the heating does shut down.There is no small background fan running heat. Its a case of nothing even in the middle of the night stat set at 4or 5 (that it i want loads of heat)nothing unless I turn off and on then full blast until I turn down to number 2 then it slows down and then switches off.

Like I said shouldn't switch off unless there is a fault. Have you checked that all the heating pipes are connected to the boiler they are often just held on with will power, if one drops off the area around the boiler gets hot & boiler overheats, and as I said earlier check the flue for obstructions, to check the flue fan you would have to dissmantel the boiler.