5 Reasons Your AC Won’t Turn On

July 17, 2022
smarthouse technician smiling with workbag in front of company truck

When you’re waiting for the cool air to come out of your AC vents in the middle of a hot summer day, the heat and the humidity can feel especially stifling. If your air conditioner is malfunctioning, leaving you panicked, sweaty, and scrambling for AC repair near you, here are a few reasons your cooling system may be failing.

1. Clogged Condensate Drain Line

As your air conditioner cools the air you use in your home, it is also pulling humidity from the air. This humidity, in the form of condensation, is drained through a condensate drain line which should take that moisture back outside. However, if this line gets clogged with gunk, that water will collect inside your air conditioner drain pan instead. This moisture collection can prevent your air conditioner from blowing cold air, or shut it down entirely. 

If you can locate your condensate drain clog, shut your air conditioner off and try and clear it yourself. Then turn your air conditioner back on after and feel for cold air coming from your vents. If you are unsure where your condensate line is, or if you still don’t feel that cold air you need, call the AC repair experts at SmartHouse right away!

2. A Dirty Air Filter

Do you keep up with replacing your air filters? Even if you follow manufacturer specifications for replacing dirty air filters, it may be worth checking the state of your air filter to see if it is clogged. If your filter is too full of dust, dirt, and bacteria, it will not be able to effectively intake the air it needs to cool. 

If you are unsure what kind of air filter your air conditioner needs, SmartHouse services and repairs all makes and models of AC units, and can help you replace your filters and get your home nice and cool again.

3. Thermostat Issues

Though it may seem basic, thermostat issues are a common culprit when it comes to an AC that won’t work. Double check the following with your thermostat before you spend more than you need to on expensive AC repairs:

  • Are the batteries in your thermostat fresh?
  • Is it set to “cool” mode?
  • Has your thermostat been bumped, or is it properly connected?

Wouldn’t you hate to replace the transmission in your vehicle only to find out the real problem is that you were out of gas? A double check of your thermostat settings will ensure it is not user error that is preventing your home from summer comfort.

4. A Broken AC Motor

The fan motor of your air conditioner takes a lot of wear and tear during the summer. If you are not feeling any air coming out of your vents at all, it could be because the fan motor is failing to push that cold air through your ductwork. 

This is not a DIY fix, and should be diagnosed and repaired by a professional HVAC technician. 

5. Refrigerant Leak

If you are feeling air coming out of the vents but it just isn’t cold, it could indicate there is a leak in the refrigerant lines tasked with cooling the air. If there is a leak present, your refrigerant lines will need to be drained, the leak should be repaired, and then recharged with the correct level of refrigerant. This should also be left to the heating and cooling professionals, so if you suspect you are suffering from a refrigerant leak call SmartHouse right away!

Keep Calm, Stay Cool, and Call SmartHouse

If you are looking to get your air conditioner up and running quickly, there is no smarter call to make than one to the cooling experts that homeowners throughout St. Louis, Brentwood, Clayton, Creve Coeur, Kirkwood, Ladue, Overland, Richmond Heights, St. Louis, University City, and Webster Groves trust with their AC repair and maintenance. 

And once your AC is back to keeping your home cool, avoid future emergencies with a regular AC tune up through our annual maintenance plan!

Don’t sweat your AC emergency — call SmartHouse and get your air conditioner up and running! Call 314-648-3127 or get in touch here.