dturn85
Apr 18, 2012, 10:37 AM
Goodman furnace approx 20 yrs old! Won't come on to heat! Its like its not getting command to heat! Replaced thermostat! Same thing! One time I recycled power from circuit board and it fired up while I was holding in safety switch! Once I let go and put cover back on same thing! Any thoughts?? Thanks
Stratmando
Apr 18, 2012, 10:46 AM
If you hold the switch and it heats, looks like the element is good.
The thermostat usually connects the red(24 volts)to the w or white wire/terminal. I would jump at thermostat for a test or verify switching of thermostat contacts.
I wonder if the safety switch is to disable the unit if the cover is removed. Check any switches and look for a diagram. 20 years ago the boards weren't too complicated.