Update on this - had a plumber come by for the leaking toilet issue mentioned in a separate thread and his company does HVAC, so he took a look. He reattached the vent pipe (said that whoever let this go previously should be fired) and we ran the startup sequence. The error code changed after that. I'd seen 31 as documented above, which was mostly about exhaust. After the pipe was reconnected, it said 34:
34 Ignition proving failutre: Check for
-Oxide buildup on flame sensor
-Proper flame sense microamps
-Gas valve defective or gas valve turned off
-Defective Hot Surface ignitor
-Manual valve shut off
-Low inlet gas pressure
-Control ground continuity
-Green wire must be connected to furnace metal sheets
-Inadequate flame carryover or rough ignition
-Flame sensor must be ungrounded
Since he was there for a plumbing issue, he recommended that we talk to their HVAC person for a follow up. Does this sound like the ignitor needs to be replaced?
Posted by: bigmikechen@yahoo.com
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