Thermostat - inner nouns grill? I have two zone heat and air. I replaced the...
I have two zone heat and air. I replaced the upstairs thermostat (The Round by Honeywell), and it worked fine surrounded by the winter with the grill, but it won't control the air conditioning at adjectives. I can only win the A/C to work with the downstairs thermostat. It's a 3 cable non-digital thermostat.
Thanks.
Answers: How many wires did your feeble thermostat have coming to it(c is 24v adjectives blue should go to furnace http://customer.honeywell.com/techlit/pd...
replace thermostat, it take 6 wires or more to operate a heat pump system