I have a 3/4 ton First Company VTAC heat pump unit that heats when the thermostat calls for cool. I have checked the thermostat wires at the unit and the tstat and all is wired correctly. I also honed the wires and they are good as well. I tried setting the temp up high to see if the unit would try cooling to see if that was the problem but the compressor won't come on. If I set the temperature below room temp it heats. I figure it's the reversing valve inside the unit. I checked the wires and it was all plugged in properly. Is there anything I'm missing?
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