Question about Heating & Cooling
The unit will turn on and run fine for a few minutes then shut off. It won't immediately turn back on, almost as if it has to cool back down first. Any ideas?
After troubleshooting like mad, I found that the flame sensor (rod that sits within the flame) was fouled with carbon on the surface. I believe this shields the rod from proper heat detection and the sensor reports that there is no flame and to shut off the gas valve to avoid explosion. Once I pulled out the rod and cleaned it with a wire brush, I have no problem whatsoever--fixed.
Posted on Nov 20, 2008
I have a Lennex Gas Furnace, It turn on and stay on for about 20 mins then turns off. You can hear the electronic ignition trying to stay the furnace but nothing sometimes after four or five tries it will come back on, but it never warms my house to the temp. set.
Posted on Jan 07, 2011
The ignitor will light, the blower will start up and run for a few minutes and then the system will shut down, and the blower will continue to run and cool down. The ignitor is not working properly, the ignitor has carbon build-up and need to be removed, cleaned all the black carbon from the ignitor with a little piece of sand paper and replaced, turn the heat back on and this should correct the problem.
Posted on Dec 14, 2009
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Posted on Jan 02, 2017
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