Question about Heating & Cooling
Posted by Anonymous on
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Posted on Jan 02, 2017
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
When you call for fan in auto ensure your getting 24 volts at pin on control board, if it is not energizing then there is a problem with the relay.. Before you change out the expensive control board, try the therm..
Posted on Dec 09, 2008
Here is a link to the manual for your unit heater:
The 4 flashes is a high limit or roll out switch is open. There are 2 or 3 little brown or black button looking switches with a little button on the top and a wire attached to each side. Press the button on each, you may hear a slight "click". If you do, that is the one that was open. Hope this helps.
Posted on Nov 04, 2009
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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