7680 856 cycling issues

[davidchlupacek]

I have been having problems with my furnace for a bit now what happens is that it will turn on then sometimes no more than a minute later turn off and then kick back on and its both the burners and the blower that are cycling. I checked the thermostat and it seems to be working I even tried turning it all the way up to 90 degrees and it will still cycle. I'm not sure what else on it to look at, I was thinking maybe the fan switch but I'm not sure. Thanks in advance.

David.

[Robert]

Hi David,

You would need to test the gas valve and limit switches to see if they are receiving voltage and remaining closed (limits) during heat cycle .

Thanks,
Robert