2 red flashes
Pressure switch closed when it should be open
This code typically points to
- Stuck pressure switch
- Inducer relay stuck on
- Wiring error/miswiring
Next checks to confirm
- Verify switch state before inducer starts
- Inspect switch tubing and wiring
- Verify inducer is not being held on improperly
Escalation
If switch and inducer are normal but board still sees closed, board fault is more likely.
Reset behavior
Clears when startup proofing is normal.
Urgent
Fix now