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I have a heater in a barn that is probably 30 yrs old and I can't get the pilot to stay lit. I think the wind is blowing the pilot out through the 4 inch vent but i am not sure. Do I need to try something with the vent or do you suggest something else? Any suggestions are welcome. Thank you.
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Try cleaning the thermocouple tip if you can see ashes or any buildup on it. If you know the wind isn't blowing it out (had mine blow out from high winds before) then I would change the thermocouple before anything else.
If it's a direct spark ignition type heater maybe that's how it's designed to.work .When called for heat pilot open allowing gas then ignitor spark and ignite the pilot then gas valve open and allow gas through burner then unit fires off . Once temp is met pilot valve closes and pilot out .
Unfortunately if its wall vented the wind can hit it just right and pop off the pilot this happens on older models a lot check your vent if its too much of an aggravation you may have to relocate it
if the pilot is clean and and strong then this should play on to the thermocouple , i take it you have changed the thermocouple , and the connection is good at the gas valve , then if this going out could be 1, powerunit on gas valve not holding at thermocouple connection
2. Hole in heatexchanger blowing out pilot when blower comes on
I take it the pilot stays on untill fan comes on and keeps going out , I would think about not putting any more money in to this and get new if sounds as the heater has had its day ,
You must clean the pilot regularly to ensure it burns properly. Use a small can of air for cleaning computers and blow air through the pilot to remove dust and small particles that accumulate in the pilot barrel. Use several burst being that it is 2 years old and has not been blown out. THe manual references cleaning the pilot in the maintenance section.
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