Nordyne Furnace Wigging Out

[erixon]

Hey guys, so lately my furnace has been doing some strange things, it still works okay, hold temp fine but a few times a day it sounds like a relay clicking. you can hear the furnace kick on like its going to start up, then this relay clicking noise starts up and the furnace goes on and off. I don't know a whole lot about furnaces, but fairly mechanically inclined. When I turn the heat up, the furnace starts and ignites and runs no problem. most of the day it's fine its just the odd time it does this. Any ideas?

[dgmadole]

My Nordyne is giving me the same problems you're having. Any idea what the issue might be yet?

Dan

[erixon]

Not really. It stopped for a while, after I took the cover off the furnace and checked connections. Now its started again. I don't know what to make of it. I might try and get a video of it making the noise.

[Mobile68]

I had the same relay click/no start issue with my Nordyne.

Lightly tapping anywhere on the board would cause the furnace to start, but I couldn't determine what relay wasn't able to close, or if the relay problem was actually a power problem on the board. The board wasn't expensive (around$120.00...some are $600.00!!), so I replaced it and all is well.

[erixon]

I replaced the thermostat so we'll see where that takes us, and go from there. I think it might be the board as well. Makes a high pitched buzz for a while right after that relay sounds stops clicking away.

[erixon]

I replaced the thermostat with a regular Honeywell, non-digital. It was running perfect for a while, but when it gets really cold outside, it starts doing the clicky relay noise with the high-pitched buzz. It seems to do it more when you go onto higher temperatures, when you keep it sitting around 21*C it's alright for the most part, higher than that it ends up going crazy.

[Mobile68]

The thermostat is just a temperature sensitive switch. It shouldn't have anything to do with your issue.