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Carrier furnace not working. Fan comes on but no heat or ignition of the gas. LED shows #23 pressure switch problem. Checked OHM for pressure switch and rollout switch; both checked out ok. What should I do next?
Take hose off pressure switch. Clean fitting with paper clip. Make sure hose has no kinks or cracks. Make sure induce draft fan is working.
Completed all steps and still no ignition or heat. Induction motor comes on for a little while and then kicks off, blower continues to operate.
Lets see if it is pressure switch. Jump the switch, retry furnace and see if it ignites. If it does, bad switch; but do not run it in this jumped position.
Finished jumping pressure switch, no change
Does induced draft motor start? Sequence of operation - Thermostat calls for heat, induced draft motor starts, purges igniter, glows, gas valve opens, ignites and flame rod provides flame.
If you still get the code and you jumped switch and still no ignition. Bad board.
You were right.
Thank you very much!
Thanks for feedback....