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I have a a Ruud furnance, model UGAC 095c. The problem is the pilot light goes out once or twice a day or late night. The thermacouple was replaced, new filter also. I also observed the pilot light and lit furnace would just turn off with a click sound. Then the pilot light would be re-lit several times and the furnace would work agian. any sugestions to this problem? thanks
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you either have a back draft blowing out the pilot light, or a bad thermal coupling. if coupling is bad it will shut down the gas flow therefore shutting off pilot light. its a safety measure to stop the gas flow if pilot goes out. replace thermal coupling, that may do it. good-day ! but shut off gas first !
Your DESA/Vanguard Vent-free, Blue Flame Heater has a pilot assembly that is equipped with and Oxygen Depletion Sensor (ODS) . When this becomes clogged with dust, lint, spider web, etc, the pilot may light and burn for a few minutes, but will soon shut down. As the ODS senses that there is not enough oxygen for safe combustion. This mimics a faulty thermocouple. A good indication that the pilot is dirty, is when the pilot flame curls upward and looses contact with the thermocouple. Cleaning the pilot and it's ODS with canned air and a straw nozzle (like you clean your compute with) should solve the problem.
If you have a pilot, then this is an older furnace. Most of them use a 2 wire thermostat. Allot of the new digital, programmable thermostats require a 3rd wire - a common to the thermostat. Allot of old furnaces do not have a common terminal on the furnace board. It can be done, but takes a good technician. The way around this is to use a digital, programmable thermostat that will operate on straight battery. It will be stated on the thermostat package, saying it will operate with a common wire from the furnace or with only the use of the batteries.
Then make sure that you hook up the 2 wires to the "R" terminal and one wire to the "W" terminal, it doesn't matter which thermostat wire goes to which terminal.
Note: If you have a air conditioner installed, it will be a different story.
Sincerely,
Good Luck,
Paul Gibson
Short answer, yes. However you could have another problem. Replace the thermocouple that keeps the pilot lit. You can get a universal one at any good hardware or farm store. Make sure the new thermocouple is well into the pilot flame. If the blower knocks out the pilot flame again, I would be suspecting cross contamination from a crack in the heat exchanger. As the exchanger heats up, it may be causing a small crack to open and allows the blower to extinguish the flame. It may also be causing a leak of Carbon Monoxide into the heated room air. I would get it checked out very quickly.
sounds like the thermacouple has gone bad. when it goes out pilot light will not stay lit. if there is a handyman around, it shouldn't be a problem to replace
bama46 please rate
have a great weekend
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