My heat pump is “cooling when it should be heating” or “heating when it should be cooling”

Some heat pumps use the O terminal, while others use the B terminal. If there is a wire in the O terminal of the Smart Thermostat, move it to the B terminal after shutting off power at the circuit breaker.

If the B terminal in the Smart Thermostat has been wired, move it to the O terminal, with the power off.  Contact a local HVAC professional for further help with this issue.

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