I’ve replaced everything in the title and checked continuity on the high limit thermostat plus took readings from the solenoids, which checked out with others readings, and yes, checked to see if the unit is getting gas (even called the company to double check). Still, the ignitor will not even begin to glow. It is a relatively new unit and all the wires seem to be in good shape. So what next?

⟐ Answer accepted January 22, 2026 at 12:09 MST

It stopped and shoes a flash HE on the display a few weeks ago. I cleaned out the vent which was a little clogged and it seemed to be working fine. Today it's starts and stops after a few seconds. Maybe 30 second or so. Flash's the HE code on the display. I took the front off and cleaned the blower which was had a fina clogged up. Still it starts and then stops running in about 30 seconds. I took off the vent hose and it has plenty of air flow but still stops. I am going to take it apart and check the wires and see if the igniter is cracked or broken.

Anything else I should check ? Any help is appreciated.