Quote:
Originally Posted by villagetinker
I have never seen an AC/Heat pump thermostat with only 2 wires. I cannot imagine how this would work, unless it is already WIRELESS to the Heat Pump unit. IMHO, I think you need to do some additional investigation. Most Heat Pumps have 8 to 10 wires connecting the thermostat to the main unit controls, and you will probably need to get the manufacturers wiring diagram to the thermostat that you intend to use. This maybe a little more complicated then a DIY project.
Good luck, and I hope this helps.
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2 wire thermostats are proprietary digital, the two wire communicates ( not wireless ) to a relay pack which does the standard switching (R,Y,G,O,W1,W2)