Old thermostat has 6 wires

[loreni]

I would like to install a new programmable thermostat. I have natural gas heat with electric air. The old thermostat has the following wires w1,w2,y1,g1,r, and b. There are 28 v running between r and b. Can I install a new prgrammable 5 wire thermostat? If so, which wires go where? What do I do with the extra wire? Thanx

[16x80]

loreni

Welcome to the Home Repair Forums

I would follow the instructions in the new thermostat, Depending on how your old system was wired would decide which way you wire the new thermostat. Make a sketch of the old wires and hook ups, then try and reconnect everything the same way.

You wont kill your heating/ac unit!

Good luck
16x80

Sorry for the long delay with work I have been very busy!