Living in Florida, we rely on our air conditioning systems more than most. That’s why when your air conditioner is blowing warm air, it isn’t something you can just brush aside.
There are lots of things that can cause your air conditioner to blow warm air – and fortunately, many can be fixed with a little AC-know-how. Before you call the professionals at Climate Design, check out the most common reasons your AC is blowing warm air below.
9 Reasons Your AC Is Blowing Warm Air
So before you call a professional, let’s take a look at the most common reasons your air conditioner is blowing warm air. And then look at the steps you can take to fix it.
1. Clogged Air Filter
The air filter is one of the most important components of your air conditioning system. Without the air filter, dust and other debris would wreak havoc on your home. While the air filter works tirelessly to keep the air in your home clean, it can only do so if it’s not dirty.
When you allow the air filter to get too dirty it can impede airflow. When the air isn’t able to flow properly throughout your air conditioning system, it can make the air feel warmer.
If your AC is blowing warm air, check the air filter first. If it’s dirty, swap it for a fresh one or clean it if it’s reusable.
Related article: How Often Should You Change the Air Filters in Your Home?
2. Thermostat Issue
If your AC is blowing warm air and the air filter isn’t the culprit, check the thermostat. It’s always possible that the thermostat was accidentally switched to ‘OFF’ when you were adjusting the temperature.
Low batteries also cause your thermostat to turn off, which will turn your AC off too. Make sure you replace your thermostat batteries when needed to prevent a system shut-down.
3. Circuit Breaker Tripped
All circuit breakers are equipped with an emergency safety feature to prevent system damage and electrical fires when the circuit overheats. If your AC system is blowing warm air, it’s possible that the circuit breaker tripped due to one of these reasons:
The circuit is overloaded: The most common reason why breakers trip is when too many devices are powered simultaneously on the same circuit. Turn off some devices on the circuit or distribute them to various circuits.
A component is short-circuiting: If you smell a burning scent from one of your outlets it could mean that two hot wires touched. This usually happens because of a loose connection or improper wiring.
There’s a ground fault: Similar to a short circuit, a ground fault happens when a hot wire touches a ground wire. Check your outlets for anything unusual like discoloration or burning.
4. AC Freezing Up
Although it may sound ironic, your air conditioner can freeze up and cause warm air to blow from the vents. There are lots of reasons why this can happen, but one of the most common is when ice forms on the evaporator coil. The ice blocks the cool air from flowing throughout the rooms in your home. Instead, the heat from the motor creates a warm flow of air.
If your evaporator coil is frozen, turn off your AC and let the ice thaw. This should take just an hour or two. Once it has thawed, you can safely turn your system back on again. Pay special attention to your system, however. If it freezes again, call a professional to perform a proper inspection.
5. AC Compressor Malfunction
The compressor works to transform the refrigerant gasses from the evaporator into a high-pressure, high-temperature gas for the condenser. Without it, your AC system can’t operate properly and may start blowing warm air.
Compressor issues are notoriously hard to diagnose and are caused by a variety of things from electrical failures to overheating. If you suspect your compressor is malfunctioning, it’s best to contact a professional for help with diagnostics and repairs.
6. Air Duct Leaks
The air ducts are sort of like the lungs of your air conditioning system. They provide the route for the cool air to travel through to get to the rooms in your home. But over time, air ducts can separate or sustain damage. When this happens, air leaks can occur and a significant amount of cool air can be lost.
If you suspect your air ducts may have a leak, we recommend scheduling an inspection with your local HVAC technician.
7. Wiring Issues
There is a lot of wiring within your air conditioning system, all of which can cause your AC to blow warm air if something goes awry. Wires can fray or be damaged by something as innocent as your family’s pet. To prevent future wiring issues, we recommend ensuring there is no wiring haphazardly exposed.
8. Refrigerant Leak
Without refrigerant, your air conditioner can’t convert warm air to cool air. That’s why a refrigerant leak is one of the most common reasons ACs blow warm air. There are lots of things that can contribute to a refrigerant leak. A joint may have come loose thanks to heavy use. Or perhaps a service valve is worn and leaking the substance.
In any case, refrigerants are dangerous and should never be handled by anyone other than a professional.
9. Lack of Routine AC Maintenance
You wouldn’t drive your car for 50,000 miles without getting an oil change – so why would you run your air conditioner for years without having it tuned up? One of the biggest mistakes homeowners make when it comes to their AC is forgoing routine maintenance.
Without routine maintenance, air conditioning systems are significantly more susceptible to wear and tear. It’s also much easier for a small issue to snowball into a costly repair. When it comes down to it, the majority of issues above could all be prevented with routine maintenance.
At Climate Design, our precision tune-up and professional cleaning help ensure your AC system is working at its best.
Air Conditioning, Electrical and Plumbing Services in Clearwater
At Climate Design, we provide quality air conditioning repair services that fit your budget. If your air conditioner is blowing warm air, our team of experienced technicians can provide a diagnosis along with a quick, efficient repair.
Give us a call today to learn more about our services or to schedule your free estimate.
Call (888) 572-7245 to Schedule Your Appointment