Award Ribbon Best of Home Advisor 2017 and 2018 Winner
Calendar Icon

Mon-Sat: 8am - 4pm
24hr Emergency Service

Why is My AC Blowing Warm Air?

If your AC is blowing warm air instead of cold air possible reasons why could include:

Thermostat Settings

The easiest thing to check when your AC is not cooling, but instead blowing warm air is whether your thermostat is set correctly. Look to see if your thermostat is set to heat, auto or on. If it’s on heat mode then warm air will definitely be blowing out of your vents. “On” mode means that the system is always blowing air through the ductwork and out through your vents whether the air conditioning is actively cooling or not. During the summer, we recommend putting your thermostat to auto mode so that you are using your system most efficiently. It may be a good idea to change your batteries so that your thermostat doesn’t run out of power during the summer.

Dirty Evaporator Coil and Filters

Have you been changing your filters regularly? If not your dirty filter may be causing problems with your AC.  Filters should be changed monthly to yearly depending on the filter type and conditions within your home (pets, smokers, etc). A dirty air filter blocks the air circulation in your system and doesn’t filter the rest of the system effectively. This can lead to a dirty evaporator coil. A dirty evaporator coil can also be caused by lack of maintenance on your AC. You should schedule an AC service in Vancouver yearly. When an evaporator coil in your AC is dirty, it will not cool properly and can result your AC’s compressor freezing up. The frozen coils constricts the air flow even more making it harder for the system to move refrigerant and keep your home cool. If the compressor freezes up, it’s time to schedule an AC repair in Vancouver.

Contact a Miller's Heating & Air Expert

Ductwork Issue

Ductwork could also be a culprit of your AC not cooling. If a portion of the ductwork isn’t sealed and connected properly it can let hot air into the ductwork. Ductwork can be knocked out of place and become disconnected over time. A professional will be able to access whether your ducts need to be sealed and/or replaced.

Electrical Issue

Running your AC system takes a lot of electricity. Check your circuit breaker to make sure that a fuse hasn’t been blown and that electricity is powering your system normally.

Low on Refrigerant/Freon

Your AC system cools your home by moving refrigerant. If you lose refrigerant through a leak then your AC will blow warm air instead of cool air. Another tell tale sign that your AC system is low on refrigerant is when you can see ice on either the indoor or outdoor units. Seeing ice on your system is never a good sign! 

Miller’s Heating & Air is your local air conditioning repair experts with over 70 years experience! We have certified technicians ready to help with any of your AC service in Vancouver and AC repair in Vancouver needs. We offer 24/7 emergency AC repair in Vancouver if your AC is not cooling. Call us today at 360-524-2880 if you need to schedule an appointment and/or have questions about your AC not cooling.

Pin for later!

Is your AC not cooling and blowing warm air? Learn how to trouble shoot the problem yourself and when it's time to schedule a repair service. #AC #ACnotworking #HVAC @millersheatingair

Leave a Reply

Your email address will not be published.