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The problem returns
I am back to square one. The furnace has the same symptom as before; the burner ignites and burns for about 20 seconds, the valve makes a clicking sound and puffs of air are heard escaping from around the cover to the burner area and the valve shuts down. This cycle repeats continuously.
I planned to replace the gas valve today but the replacement valve specified by Carrier was not a match. The old valve has a six wire connection collected on a single plug, while the new replacement has a five wire connection with separated 1/4" terminal tabs. I had the parts supplier research to see if Carrier provides an adapter to match up the wiring, but they do not. The old valve is an Essex SX345NSRX-14 which I'm told is obsolete.
In my checking around, I was told that the error code 31 may not indicate "high pressure switch fault" as stated on the unit, but it could also indicate an inducer problem or a problem with the heat exchanger.
Would the emergency heat function provide a short term solution? If so, how is in activated?
Any help would be greatly appreciated!
Bill
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