Furnace follow up AGAIN (those of you in the industry I have a question)

[USMC88-93]

In my previous thread, replacing the transformer fixed problem.

I had the doors and windows open today due to warm weather, late in the evening after it had cooled down considerably I turned the furnace back on and relaized after a time that the furnace never kicked on and it was unresponsive.

Did the typical non technical flipping of switches and circuit breakers then opened the door and held down door switch and I had the two blinking green lights seen in the video below but with nothing kicking on.

pulled the leads off the transformer and checked voltage in and out. (It was good) then put leads back on and held down door switch again. This time it kicked on (fan followed by ignition and gas flow) and the two blinking green lights still going.

Can any of you tell me what the pair of green lights blinking in sequence with each other indicate given the furnace info below? I can not seem to find a manual for troubleshooting this furnace circuit board but I can find a replacement board online.

Furnace info: Air Ease RGH80A100D14-2A

the control board at this link appears to be similar if not identical to what is in mine. http://www.americanhvacparts.com/p-1...el-lennox.aspx

[fitterjohn]

Did it light the main flame and stay running this time ?

[Walker2970]

This is on the Lennox board you linked https://www.manualslib.com/manual/82...page=29#manual

the Model number you supplied dose not to be a good number for the unit but is a good number for the burner
hope this can help

[Wulf202]

The lights will blink a code depending on why it's not firing. The code key should be on the inside of the door. There should also be a sight hole in the door so you can see the code before breaking the door switch

[USMC88-93]

Did it light the main flame and stay running this time ?

Yes it has ran since I closed it.

So found this on the door, so based on the video are they "slow" blinking or "fast" blinking, as fast according to the door fast blinking in tandem is normal operation.

[Wulf202]

Fast

[brutal]

Blinking would appear normal.

Dirty interlock switch?

Just my backyard mechanic non-professional thoughts.