Our homes are supposed to provide us a place to escape the summer heat, and discovering that your air conditioner is blowing warm air can really ruin a hot day. Sometimes, you may be able to resolve the issue yourself – or at least narrow down the cause. We’re always here to help no matter how small or large your home HVAC issue, but it helps to understand what’s going on with your system.
Here are some common reasons your air conditioner is blowing warm air:
Thermostat issues. Accidentally setting the thermostat to heat can cause warm air to blow from your HVAC, but the problem with your thermostat isn’t necessarily that simple. The battery in your thermostat might need to be replaced. Also, remember that if you turn the thermostat to ON rather than AUTO, the system may blow warm air when the compressor isn’t running. Set the thermostat to AUTO and 78 degrees for the best results during the summer.
Circuit breaker problems. In some circumstances, the fan could have power even if the condenser doesn’t, so check the circuit breaker to make sure it isn’t tripped – or if the home is older, that you don’t have a blown fuse. To reset a circuit breaker, first turn it to the off position before trying to turn it back on. If the breaker trips a second time, there may be a problem that requires repair by a professional HVAC service technician.
Dirty evaporator coils. If the air filter is dirty, this could have caused the evaporator coils to get dirty, and this can cause your HVAC unit to blow warm air in the summer. Coils can even freeze up, impeding air flow. Turning the unit off for several hours, changing the filter and then restarting it may solve this problem. But dirty coils need professional cleaning as soon as possible. Note that the problem could be with coils inside your home or at the outdoor unit.
Your system could also be low on refrigerant, which could be caused by a leak that requires a fix from an HVAC service technician since even modern refrigerants can be dangerous.
If you need help getting your system working again, don’t hesitate to contact us. Fixing under-performing and malfunctioning HVAC systems is what we do every day – and there’s a solution for every kind of problem. Why not contact us today and schedule a service appointment?