The answer to 'AC repair not heating' is that the most common causes are a problem with the heating system, a thermostat issue, or a refrigerant leak. Symptoms may include the AC blowing cool air instead of warm, the system not turning on, or the unit making strange noises. Solutions can range from adjusting the thermostat, replacing faulty parts, or recharging the refrigerant. However, some HVAC repairs are best left to professional technicians, especially if the issue involves the electrical system or refrigerant handling.
In general, it's best to call a professional HVAC technician if the problem persists or you're not comfortable troubleshooting the issue yourself. DIY repairs may be possible for simple thermostat adjustments or changing air filters, but more complex problems often require specialized tools and expertise to diagnose and fix properly.