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.
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.
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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.
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.
the pilot says on yes ? if not pilot could be blocked and need cleaning out or thermocouple needs changing if pilot is staying on then there could be a limit switch shutting off too soon , or burner needs cleaning
If your pilot light will not stay lit when you release pilot light button then chances are that your thermocouple is bad. Make sure that the tip of thermocouple is directly in line with pilot light. Tip of thermocouple should be cherry red if it is properly placed. If pilot will not stay lit then replace it. If you aren't sure about placement of thermocouple you can heat thermocouple with a seperate heat source. If you do this and pilot light stays lit then reposition thermocouple in pilot flame. If it still won't keep pilot burning then replace thermocouple. Hope this helps. Thanks.
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
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
Could be your thermocouple. The spark should light the pilot and the pilot lights the main burner but if the thermocouple doesn't pick up the heat from the pilot the igniter will keep trying to light it until it times out and shuts off to prevent gas buildup.
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).
This is normally caused by the thermocouple. This is the part the pilot light heats up to let the heater know the gas is on and the pilot light is lit. The heater will shut off if it thinks the pilot light is not lit for safety reasons. You will need to change the thermocouple for it to work again correctly.