Question about Desa International CBN20T Heater
I have a wall mounted CBN30T,I just started using last week, it works for about 20 25 mins. So I cleaned it, wiped the dust off everything and compressed air.
When I cleaned it I took the glass plate off. Which seemed to help more than anything. When I put it on the pilot flame chokes, it will try to stay lit but generally cuts off after a few mins, the thremocoupler doesnt seem to turn it off, I think the pilot flame goes out, which triggers the coupler to shut the valve and then the whole thing turns off. Since Ive cleaned it, and left the plate off, it works 30 mins to an hour.
Is the gas/air mixture off?
Would that cause the pilot flame to struggle to stay lit?
It doesnt last long at all with glass plate on, making me think it needs more oxygen to stay lit properly.
Perhaps the pilot should somehow be aimed more into the burner flame? so that the burner flame keeps the pilot lit. (Ive seen the burner reignite the pilot several times, which is why I think the pilot light is the source of the problem.)
Im renting, landlord is nice enough, can call the the right people if need be, but Id rather get warm asap, and I like doing things myself.
IF its balance flue it could be blocked . Burner or orifice blocked lack of air to pilot slightly blocked thermocouple defective .
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Posted on Jan 02, 2017
ONLY ONE OR TWO THINGS AT FAULT.YOU HAVE A BAD THERMOCOUPLE.THIS IS PROBLEM 90% OF TIME AND CHEAPEST REPAIR.IF THIS DOES NOT SOLVE PROBLEM GAS VALVE IS BAD.HOW IT WORKS:THERMOCOUPLE WHEN HEATED WITH PILOT FLAME CREATES ASMAAL ELECRTRCAL SOURCE THAT HOLDS A MGNET OPEN AFTER HOLDING THE PILOT DOWN FOR ABOUT A MIN..THEN TURN GAS VALVE TO OPEN POSITION AND MAGNET WILL HOLD GAS VALVE OPEN.IF GAS VALVE DOES NOT STAY OPEN IT USUALLY INDICATES BAD GAS VALVE
Posted on Oct 13, 2009
well, these heaters are typically thermostat-bound, and I have found that they simply will not burn continuously, like a blue-flame heater. Try turning up the setting--this will make it come on/off more often, effectively heating at least one med-lg room, and partially for adjoining areas. Keep in mind that these only rated for 700-1500 SF--that is NOT the floor measurements, but square feet of airspace; eg., a 10' x 15' room has 10' x 15' x 8' (8 foot ceiling) =1200 sf. That said, My 15k btu wall unit had been the sole heating source for my entire home for 5 years, until last year, when I acquired another smaller unit. However, I typically only use a few rooms, and shut off unused areas (ya, was 'cool' in unused back room areas).
Posted on Jan 19, 2011
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