The answer to 'AC repair not heating' is that the most common causes are a broken thermostat, a refrigerant leak, or a problem with the heating element. Symptoms include the AC blowing cool air instead of warm air, the system not turning on at all, or the home not reaching the desired temperature. Solutions can range from a simple thermostat replacement to more complex refrigerant recharging or heating element repair, which may require a professional HVAC technician.
If the AC is not heating, the first step is to check the thermostat settings and replace the batteries if needed. You can also try cleaning the air filters and clearing any debris around the outdoor unit. However, if the problem persists, it's best to call in a qualified HVAC professional to diagnose and repair the issue, as improper handling of refrigerants or electrical components can be dangerous for a DIYer.