repair and replace HVAC
Posted: Fri Dec 17, 2010 2:05 pm
I have a 66000 BTU Nordyne LP furnace w / AC about vintage 1985 Mod# MGHA-0066ABFC-01
It's in a 28x50 double wide, in N. MS.
I used the furnace last spring. Since the temps lately stayed below freezing, I lit the pilot, but the burner and fan did not work. I found a wire nut melted at the line in on the black wire, which is also connected to the off, on, fan, switch. A new wire nut enabled the fan motor but not the gas valve.
The electrical diagram concerning the Normally Open and Normaly Closed switches, and relays: This does mean their state when they are disconnected?
I assume that I have other electrical problems. The old controls have no circuit board or trouble lights.
I have added a new thermocoupling. I have read but not understood the term lockout. I've repaired GE electrical HVAC and have a voltmeter.
This unit should be upgraded to a more efficient unit: what's best fo a moble home closet type?
Thanks for reading and I hope to learn something from anyone.
It's in a 28x50 double wide, in N. MS.
I used the furnace last spring. Since the temps lately stayed below freezing, I lit the pilot, but the burner and fan did not work. I found a wire nut melted at the line in on the black wire, which is also connected to the off, on, fan, switch. A new wire nut enabled the fan motor but not the gas valve.
The electrical diagram concerning the Normally Open and Normaly Closed switches, and relays: This does mean their state when they are disconnected?
I assume that I have other electrical problems. The old controls have no circuit board or trouble lights.
I have added a new thermocoupling. I have read but not understood the term lockout. I've repaired GE electrical HVAC and have a voltmeter.
This unit should be upgraded to a more efficient unit: what's best fo a moble home closet type?
Thanks for reading and I hope to learn something from anyone.