Question about Desa International Blower Glow Warm Wall Heater

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Heater shutting off

Have a two brick heater replaced the thermocouple had to help heat it to get the pilot to burn after about 15 seconds pilots shuts off. While pilot burning turned heater to low after about 15 seconds heater shut off and pilot goes out.

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It was suggested I clean the pilot. I bought pipe cleaners and cleaned the pilot and now it works as it should. Thank you for the help.

Posted on Nov 18, 2008

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This type of heater is very sensitive to the state of the pilot since it uses a Renni type thermocouple to sense a low oxygen situation. Usually the pilot needs to be cleaned. If that does not restore operation only other thing to do is try replacing the thermocouple.
A low pilot will usually hold for a few minutes so I would expect that you have a bad thermocouple.

Posted on Nov 18, 2008

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1 Answer

Y does my glw-warm heater keep shutting off


Is this an unvented heater? They have oxygen depletion sensors which shut off the heater to prevent burning up all the oxygen in the room. Heaters over 10,000 btu's should not be used in small rooms like bedrooms and bathrooms. Other causes could be a dirty pilot orifice. Turn off the unit (so pilot is off) and use a can of compressed air with attached straw, to blow out any dust from the pilot assembly. (Where the pilot flame comes out). This will allow the pilot to burn a strong blue color and keep the thermocouple heated properly. If it's a thermostatically controlled heater, make sure your thermostat bulb is cleaned off regularly. Dust will insulate the bulb from sensing the room temp and will not operate properly. Hope this helps.

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check to make sure that the poilet lite flame is touching the tip or top of the thermocouple.
the pilot lite needs to heat up the thermocouple so that the thermocouple opens the gas to the main gas log. a cold thermocouple shuts off the gas to the main gas log or gas burner and a hot thermocouple opens the gas to the main burner.
the pilot lite flame must be touching the thermocouple to heat it up.
pilot lite orface needs to be clear to let the pilot flame gas through with enough pressure so that the little flame can reach & touch the thermocouple. Pilot lite gas feed tube must be clear to let gas through. Use compressed air or a fine sewing needle, or even carb cleaner to clear out orface hole and gas feed line to pilot lite.

important!! WARNING:
if you use carb cleaner,make sure all the carb cleaner is dry,soaked up with paper towell or kleanex tissue and blowed out with compressed air , because carb cleaner can burn just like gasoline; so any carb cleaner must be compleatly gone before you attempt to lite the pilot lite.

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I have a Dyna-Glo natural gas unvented roon heater that is wall mounted. The model is #GH-55(30,000 BTU). The pilot lights,but the main burner shuts off after 10-15 seconds with a fairly loud clunk. Do...


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I have a readyheater model 65-85 the flame will not stay lit im thinking thermal couple is there a way to test this part? or could it be another problem?


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1 Answer

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It can either be your pilot orifice is dirty and not sufficiently heating the thermocouple or your thermocouple is defective and needs to be replaced. Is your pilot flame yellow or blue? It should be a strong blue flame impinging directly on the thermocouple. If it's not, shut it down, take a can of compressed air and blow out the dust, spider web or whatever is inside the pilot assembly where the pilot flame is. Then try relighting it and see if that improves the flame and keeps it lit. Otherwise, just replace the thermocouple. Douglas

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1 Answer

My patio mushroom heater lights up ok but keeps going out by itself after about 5 to 10 minutes and then can be started again inatantainiously by starting pilot light and away you go until it goes out...


Hello,
Here's a few things to check. When you light the pilot, is it a strong blue pilot flame, a weak blue flame or a lazy yellow flame? Is it heating the thermocouple enough to make it red hot after a few minutes? If the pilot is small blue or lazy yellow flame, it may be dirty and need cleaned. When the burner lights, the weak pilot flame may diminish causing the thermocouple to cool off enough to shut down the main burner. Clean the dirty pilot orifice by using a can of compressed air with attached straw. (The same canned air you use to clean computer keyboards) Blow it into the pilot assembly where the pilot flame burns out from and blow thru the air holes on the side, if applicable. You might also check the thermocouple itself to make sure the tip is not partially burn't off. It should be a smooth, rounded tip. Replace the thermocouple if cleaning the pilot orifice doesn't solve the problem. Douglas

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1 Answer

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Sounds like a weak thermocouple. With the extra heat of the main burner running it can keep the pilot solenoid open...without it it fails shut. Try replacing the thermocouple. (small rod the pilot flame burns against with a skinny copper tube going to gas valve).

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1 Answer

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