High efficiency furnace

[Plumber69]

Intermittent problem? I'm stumped.
Jump thermostat hold door switch.
Inducer came on, ignitor glows, burners fire up but instantly go out. Like as soon as they lite instant out. No time for flame sensor to even detect flame. Keep holding down door switch.. 2nd cycle ignitor flows and nothing, no flame, 3rd cycle ignitor glows and nothing, no flame. Let go of door switch and inducer keeps running. (This is where I'm really stumped) Turn power off and back on with R and G still jumpered and no call for heat. Push door switch and everything works normally now. Tried 3 times after and everything is perfectly fine

 

[John Gayewski]

You had an air bubble in your gas.

 

[Sponsor]

 

[Fitter30]

R to G is the blower not heat
R to W heat
On the igniter board there should be light that flashes when a failure occurs. Should be list of failures should b either on control or wiring diagram ( blower door)

 

[Plumber69]

R to G is the blower not heat
R to W heat
On the igniter board there should be light that flashes when a failure occurs. Should be list of failures should b either on control or wiring diagram ( blower door)

I meant r w

 

[Plumber69]

You had an air bubble in your gas.

But it was running intermittently fine the morning before. And the door switch issue

 

[Fitter30]

Theres at least two pressure switches, a rollout safety, two hi limits, hot surface igniter and flame rod all coming out of that burner control. Without reading the fault lite your just guessing. Take a pic of the furnace nametag and burner control.

 

[John Gayewski]

But it was running intermittently fine the morning before. And the door switch issue

Intermittently and fine?

 

[Fitter30]

Door switch makes , breaks , makes everything resets. Kill power and jump switch out see what happens but never came across a bad door switch

 

[Plumber69]

Got a 3 flash code. Guess I'll check condensate and exhaust

 

[Fitter30]

Check the plastic tubing for condensate in them going to pressure switchs