Question about Heating & Cooling
Is the gas valve on? gas line cutoff set to allow gas to flow through. there should be a list on the control panel to tell you what 4 flashes means its probably no flame sensed. the board may not be sending power to the gas valve or the gas valve could be stuck.
Posted on Oct 15, 2013
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Posted on Jan 02, 2017
Yes, there is a flame sensor that will tell the gas valve to open, thus igniting the burners. When you say the fan is running is it the blower fan or the little exhaust fan connected to the vent. Because the blower fan should not come on when the burner is not firing. I think you need a new limit switch that or your thermostat is being being unreliable. Try by-passing the thermostat by jumping the red to white wires on it. They are only 24 volts so you need not to worry about being shocked (you may feel a slight tingle if the conditions are right) you do, however need to be careful not to touch any of the wires to anything else as it may blow out your transformer or the fuse protecting it, to see if it changes the problem. When the ignitor is clicking can you see spark jumping from the pilot to the probe? I will need more info to be more helpful.
Posted on Dec 22, 2007
SOURCE: Turn Thermostat to call for
That particular intermittent pilot gas valve uses one of three ignition control modules; S86F, S8600F, and S8610. Check the pilot assembly and look at the flame, could be a weak flame, dirty or clogged, if its not lit or weak, you’ll hear a constant buzzing or “sparking” sound, this will lock-out the gas valve. If you hear nothing at all, start with cleaning or replacing the pilot assembly, then check the ignition control module.
Hope this helps
Posted on Dec 03, 2008
Try cleaning the flame sensor. It is located right besides the last burner. Looks like a thick piece of wire. Take steel wool and gently remove the carbon that has built up. Should only take 4 or 5 strokes. Let me know how it goes after that. ken
Posted on Dec 23, 2008
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