Toddraptor660
27-10-2008, 01:02 AM
Has anyone had any experience working on an older gas fired furnace for a manufactured home?
This is an older nordyne unit .
model M1MB 070A BW
serial M1M991001840
The unit is going through its sequence of operation the hot surface ignitor is glowing red and the furnace will fire up for about three seconds, and then goes out.
it will then wait about 30 seconds and trys to refire again it fires up and gos out in about 3 seconds.
I am pretty sure it has to do with the flame sensor but there is no flame sensor on the burner assy I can see.
It has two yellow wires on the gas valve that go to an furnace control board 624602-A 9937
I am not sure how the system works as I have never seen a system that didnt have some sort of flame rod or sensor in the flame.
It has some sort of reflector that the flame blows against but i can find no way that this could be used to sense the flame.
Any help would be greatly appreciated.
Thanks,
Todd
This is an older nordyne unit .
model M1MB 070A BW
serial M1M991001840
The unit is going through its sequence of operation the hot surface ignitor is glowing red and the furnace will fire up for about three seconds, and then goes out.
it will then wait about 30 seconds and trys to refire again it fires up and gos out in about 3 seconds.
I am pretty sure it has to do with the flame sensor but there is no flame sensor on the burner assy I can see.
It has two yellow wires on the gas valve that go to an furnace control board 624602-A 9937
I am not sure how the system works as I have never seen a system that didnt have some sort of flame rod or sensor in the flame.
It has some sort of reflector that the flame blows against but i can find no way that this could be used to sense the flame.
Any help would be greatly appreciated.
Thanks,
Todd