[Z-linkCobra]

Gas fired furnace should not run the compressor or outside unit when in the heat mode. You have a wiring problem with you t-stat. I would have to look at a wiring diagram to know for sure. But if i remember correctly there is a jumper wire that has to be removed for electric or gas heat as oppsed to heat pump.

The only time your outside unit should run when in the heat mode is if you have a heat pump.

Have someone check it out for you, at this point your electric bill is going to go through the roof. Your trying to chill and heat the air at the same time.