The answer to 'why is my heat pump' is that there could be several common causes, such as a refrigerant leak, a faulty compressor, or issues with the thermostat or electrical components. Symptoms may include the heat pump not turning on, not providing enough heat, or making unusual noises.
Some potential solutions include checking the air filters, clearing any debris around the outdoor unit, and ensuring the thermostat is set properly. However, many heat pump issues require the expertise of a professional HVAC technician, especially if the problem is related to the refrigerant system or requires more complex repairs.