The answer to 'my heat pump won't turn on' is that there are several common causes, including a tripped circuit breaker, issues with the thermostat, or a problem with the heat pump itself. Symptoms may include the unit not powering on, the fan not running, or the home not heating up as expected.
If the circuit breaker has tripped, simply reset it. If the thermostat is not functioning properly, try replacing the batteries or checking the thermostat settings. However, if the issue is with the heat pump itself, it's best to call a professional HVAC technician to diagnose and repair the problem. Attempting to service the heat pump without proper training and equipment can be dangerous and may cause further damage.