furnace start needs AC cycled to start

Victor111December 12, 2012

I have a TRANE furnace that at times will need to have the main AC switch turned OFF, then ON to start. Thermostat is OK.
Any ideas? Thanks.

Thank you for reporting this comment. Undo

What do you mean by the "main AC switch". Are you talking about the circuit breakers in the electrical panel or something else?

    Bookmark   December 12, 2012 at 11:36AM
Thank you for reporting this comment. Undo

Service toggle switch next to unit.

    Bookmark   December 12, 2012 at 3:32PM
Thank you for reporting this comment. Undo

I assume this switch supplies the 120V power to the furnace. It could be a number of things, but my suspicion it is a control board problem.

    Bookmark   December 12, 2012 at 3:52PM
Thank you for reporting this comment. Undo


Thanks for the response.

I tend to agree with you.

It could be a limit/safety switch setting an indicator on the control board which gets reset on power down! All I know is that the thermostat says HEAT ON and when I cycle the service switch the unit fires up.

The vent blower starts up, the ignitor lights up, the burners light, and the air circulation blower finally comes on. I plan on replacing the ignitor anyway, it is 17 years old.


    Bookmark   December 12, 2012 at 4:57PM
Sign Up to comment
More Discussions
Need help with my Heat Pump
I have a 2 ton carrier air handler that is 410-A compatible....
Jason Johnson
Neighbor Finally Upgrades to Heat Pump
My next door neighbor finally took my advice and upgraded...
I Like the Forum Changes
IMO; this new forum setup is an improvement...
Problems with HVAC in 1958 Cape Cod
I've been reading the blogs here and hope that the...
Geothermal vs Carrier Greenspeed
I am looking to replace my current Heatpump. I have...
© 2015 Houzz Inc. Houzz® The new way to design your home™