Hey Robert! Just wanted to say thanks for the help you did and continue to provide, in this post and in so many others that I read and learned a great deal from in what paths to follow for troubleshooting the beloved furnace. The service and help you provide here on your own time is certainly except...

Final chapter to this story: As it turns out, sequencers are indeed relays that work sequentially (took one apart), the M's do not matter which side faces what as far as in and out. What does matter is this: Inside the sequencer between the two bottom connectors is a round brass plate that holds the...

Hi Robert, thanks for the reply. This is actually the first time I've ever looked at a furnace, just did a lot of reading. Got a question about the basics you covered: You stated 120v from breakers to M1, M3, M5 (assuming then M2, M4, M6 go out to left side of coils) The schematic from Nordyne says ...

Meanwhile back on the ranch.... Talked to a friend in HVAC, was told to check the heat coils and limit switches. Pulled the heat coils out (3 coils), cleaned them up and there are no problems - each meters about 12 ohms across from one end of coil to the other. Metered the limit switches, they are c...

Hi! Our troubles began when the heat wasn't coming, fan worked fine when turned to on and with the a/c - nothing with heat setting. So after some diagnosis and searching on here I narrowed it down to the sequencer (or so I thought) Ordered a new sequencer, while waiting for it, took the whole blower...