Main Furnace problems

[Arv]

Maybe someone can help me with ongoing intermittent problem I have had with the main furance in my 06 Vectra. The furance will not start at a set point most of the time. I can get it to run sometimes by switching the Coleman-Mach control to off and back to gas heat. I can always get it to run when setting the temp to 5 degrees higher to the room temp. It will come up high speed fan and the furnace will fire. Coleman-Mach sent me a new controller, but did not help. Any ideas?

[Arv]

Maybe someone can help me with ongoing intermittent problem I have had with the main furance in my 06 Vectra. The furance will not start at a set point most of the time. I can get it to run sometimes by switching the Coleman-Mach control to off and back to gas heat. I can always get it to run when setting the temp to 5 degrees higher to the room temp. It will come up high speed fan and the furnace will fire. Coleman-Mach sent me a new controller, but did not help. Any ideas?

[troth]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Coleman-Mach sent me a new controller </div></BLOCKQUOTE>
Arv, when you say "controller" do you mean a new thermostat? I suspect your thermostat is not working correctly.
If I were you, I'd give my Winnie dealer a call and get scheduled for a check-up. Meanwhile, you can search this forum by hitting the "Find" magnifier tab above and enter keyword "Coleman thermostat". There has been some good troubleshooting info posted in here.

[peter griffin]

i had a similar problem.. i was not moving the switch far enough kind of stuck in a midpoint. my problems went away
good luck

Do you have it on "auto" or "on" when it does this?