Allright, I own several small scale rental properties. I don't claim to be an HVAC professional as I don't make my money through it, but I have a pretty darn good handle on what is going on. (mobile A/C certified)
Today I have come up with a bit of an issue involving one of the unit's furnace.
I have a app. 15 year old goodman "dependable 92" that is firing, running about 5 seconds, and then shutting itself off. It has a light on the control board to flash out error codes, so I let it cycle as I watched the light.
It didn't flash out any error codes, but kept repeating the cycle. It would attempt to start about 4 times and then would just shut itself down.
So i decided to ignore the control board and just think for myself. It was acting like a bad thermocouple/flame rectifier so I pulled the rectifier and cleaned it as well as it's contact.
Reinstalled it and now it's working better, but still not right.
So here's my question:
On the panel it says a bum flame sensor should give off a 1 flash code. the light stays on solid. what should it take for the unit to recognize it's flame sensor is bad? Because by all accounts, it should have recognized a rectifier that wouldn't let it fire more than 5 seconds at a time.
Is there anything that would act exactly like a bad flame sensor, but not be the flame sensor itself?
Just making sure there are no other checks to do before putting parts in. (especially since none of this happened until after all the parts houses closed- of course)