This is a brand new heat pump system with a train air handler and an off-brand condenser. The old thermostat works fine. I get 29 volts on the yellow wire and it’s in cool mode, I get 29 volts on the orange wire and white I think and it is in heat mode. In cool mode only the yellow wire and of course the red common only those have voltage. I hooked up the wise thermostat and I got 18 volts on W1 and 29 volts on y1. I disconnected the white wire and no change. I swapped heat and cool and still got no change. How can I get the same voltage from both thermostats and have the heat pump being heat with one and cool with the other?
advanced>swap hot and cold should fix the non- cooling issue, If it is heating when it should be cooling.
It’s only heating. It never cools. I’ve checked the voltage signal at the heat pump. Even what it should be cooling is heating. But the cheap thermostat works fine, with the same voltage on the the same wires.
when you set it up, what wires did you tell it your old thermostat used? it’s literally not possible for it to “only heat” if you select swap heat and cool unless you have wires shorted together. The only thing that determines first stage heating in a heat pump system is the o/b wire (reversing valve).
You have the following wires: o/b, c, rc, aux, y, g. You do not have a w2 wire.
For testing purposes, disconnect the white wire and try swap hot and cold.(at the same time)
one of the 2 settings of the swap hot and cold setting will result in cooling.
if you’re going to do voltage testing, check between C and o/b not between C and w1. w1 is aux (backup heat) and should only come on when the heat pump is unable to meet the heating demand.