Quote:
Originally Posted by Rdeemat
I've checked intake and exhaust for wasps, mud dobbers, bugs, spiders and all is perfectly clear of any obstructions. I'm a full timer and heater worked great since 2007 when I bought it. The heater turns on and runs air for about 30 seconds and then shuts off. Is it time to replace it or is there something else I can check?
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When a furnace turns on, the first thing that happens is the blower runs. Then the furnace ignites the propane. If the furnace goes through three igniting cycles (you will hear a series of clicks from the igniter, a pause, and will repeat two more times) and does not light, the furnace will go into protect and shut off.
If during the thirty seconds the exhaust from the furnace isn't warm, that's another way to determine that the furnace is not lighting.
First thing to check is that your tanks are not empty (I know, it's silly but this is about 30% of why furnaces don't fire)
Second, you could have a cracked ignitor, that would cause the arc to contact the nearest ground (furnace frame) instead of next to/in front of the propane orifice.
With out getting too technical, there are a few circuits that could also cause this, which are not expensive fixes (including a cracked ignitor) but if you don't have experience working on furnaces I suggest that you take it to a dealer.
Most likely, the parts needed and including the labor will be cheaper than replacing the entire furnace.
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