You may have a situation where power to the blower or fan, and indoor component, is active, but power to the outdoor compressor unit is not active. That would result in warm or hot air blowing through the vents. Double check your circuit breakers to make sure the outside unit has power.
What causes an air conditioner to blow hot air? The obvious answer is that the thermostat hasn't been set properly, or perhaps needs replacing. Beyond that, the possible causes grow more serious. Air conditioning systems depend on refrigerant gas cycling through a closed system in order to function as they should.
REASONS YOUR AC IS BLOWING WARM AIR
Here is why; Dirty filter: A dirty filter limits airflow through the system, eventually straining your AC and making it blow warm air. Clogged/dirty outside AC unit: Both the outdoor and indoor AC units work together to supply cool air during summer.
There are a number of reasons why your air conditioner might be running but not cooling. It could be an issue with the thermostat, the compressor, or the evaporator coils. Or, it could simply be clogged with dust and debris, which is preventing it from working properly.
Yes, you should turn off your AC if it's not cooling.
If your home lacks insulation or has air leaks, your AC won't cool your home efficiently. Replacing the air filter or cleaning the coils could be a simple solution. An AC unit that's too small or too old might not be powerful enough to cool your home.
One of the solutions to HVAC blowing hot air would be to turn off your unit, clean the condensation drain, and allow the coils to defrost before turning the system back on.
Press the reset button. Most models require you to hold the button down for 3-5 seconds before releasing. Restore power to your AC. Restore power to the unit at the circuit breaker, and make sure the unit is set to “on” and your thermostat is set to “cool.”
First, check your filters and coils for dirt and debris that may be impeding airflow. Once you've cleaned the filters and coils, run the air conditioner with just the fan so that the ice accumulation can melt off. If the AC still doesn't blow cold air, it could be that refrigerant levels are too low.
When an AC blows but doesn't cool properly, expect to pay $150 to $500+ on average, depending on needed repairs like refrigerant leaks, clogged filters/drain lines, blower motor issues, frozen coils, etc. Try reviewing a DIY guide to troubleshoot and fix your AC unit.
You can generally identify a blocked air duct by a distinct drop in heating and cooling efficiency, increased energy costs, and occasionally a musty, dusty smell throughout the home. The blockage usually comes over time, by a buildup of dust and debris that just accumulates until it begins choking the system.
One of the most obvious signs that your vehicle needs a Freon recharge is that your vehicle will be blowing warm air, even after your vehicle has been running for some time. If your refrigerant gets too low, there will simply not be enough “coolant” to cool the air as it is passed through your evaporator coil.
On average, AC compressor costs range from $800 to $2,300, with most folks paying $1,200 for a new one. However, your price will vary depending on factors like the size and brand of your compressor. Before you schedule your replacement, read on to learn about all AC compressor cost factors.
Airflow is lower: Lower airflow coming from the air conditioner often means a weakening compressor. The AC is overheating: Are you experiencing frequent circuit breaker trips when the AC is on? This often means the compressor motor is overheating and overloading the circuit breaker.
While your AC fan may continue to run if the compressor is bad, this doesn't mean your system is functioning properly.
The Two Most Common Causes of Home AC Blowing Hot Air
If you're getting hot air, it usually means one of two things: There's a problem with the compressor or the outside unit, or. Your AC is low on refrigerant.
Perhaps the most common cause of AC issues is clogged filters. Dirt, pet hair, pollen and dust can clog your filters. When filters get clogged, they begin to restrict the flow of air through your AC. The result is that the AC doesn't cool your indoor air effectively.
How Often Do I Need to Change Out My Air Filter? Generally, most air filter manufacturers and HVAC companies recommend changing your air filter every 90 days, or 3 months. That can change based on where your home is located (ex. dusty, dry climates), if you have any pets, and the age of your system and equipment.
Then, when the air conditioning is off, the contactor prevents electricity from entering your AC unit. Over time, your contactor can collect dirt, attract insects, or get stuck in a certain position. As a result, it may stop working properly—which can force air out of your vents even when your AC is off.
Low refrigerant levels: Low refrigerant levels can lead to your AC not being able to produce cold air, resulting in hot air being circulated throughout your room. Low refrigerant levels can occur due to regular wear and tear or leakages in the unit.
A bad thermostat can be detected when your AC or furnace is not turning on, your HVAC systems are not turning off, the thermostat not responding, your HVAC system is short-cycling, the room temperature not matching the temperature displayed on the thermostat, and the programmed setting resetting themselves.