Why is My AC Not Working?


AC Not WorkingThis time of the year your air conditioning working may not be the first thing on your mind unless you live in the most southern parts of the country.  In reality the winter months can really be the most important time of the year for the air conditioning system in your vehicle to be functioning properly.  In winter months the extreme temperature swings combined with a lot of precipitation and frost in the mornings can make keeping your windows fog and frost free extremely difficult.  The moisture on your windows is removed by blowing warm, dry air over the surface to help the moisture evaporate.  The air in your cabin can be warmed up through the heater, but it can be difficult to keep dry during the winter months when there is so much moisture in your vehicle.  The air conditioning system is used to dry out the air in your car and make the defogging and defrosting process much more efficient.

In the winter, it often can be difficult to tell if your air conditioning is working properly.  On many vehicles the AC light will simply not come on when you push the button if the air conditioning is not working properly, but you can also tell a few other ways.  You can check the AC compressor for operation by watching the center of the pulley while the AC button is pressed.  If the center starts to spin when the button is pressed you know the compressor is operating.  Lastly, you can hook up your air condition system to some gauges to test the pressures inside the system to see if it’s working properly.  Many auto parts stores sell replacement refrigerant that comes with a pressure gauge for the low pressure side if your AC system which can be an inexpensive way to test pressures.

The main cause of your AC not working is likely due to it having low refrigerant.  Your air condition system uses high pressure refrigerant to cool and dry the air in the cabin of your vehicle.  Due to the way the air conditioning system is designed and mounted in your vehicle, this high pressure refrigerant can leak out of a lot of different areas including the hoses, the fittings or the condenser and evaporator.  Even small leaks over the course of a summer of driving can lead to a loss of cooling power in your air conditioning system which can leave your windows foggy and difficult to keep clear.  This can lead to dangerous driving conditions especially at night with the glare of other driver’s head lights.

AC Not WorkingTo get your air conditioning back to its optimal operating condition you need to first seal the leaks and then refill it with refrigerant.  Tracking down your AC leak can be extremely difficult because the refrigerant used is an odorless colorless gas that doesn’t leave any traces as it leaks it.  It can be much easier to simply seal the leaks in your AC system from the inside.  BlueDevil Red Angel A/C Stop Leak can seal any leaks in your air conditioning system without the removal or replacement of any components.  BlueDevil Red Angel A/C Stop Leak will stay in your air condition system without harming any of the components.  Once it reaches the leak point, BlueDevil Red Angel will form a chemical weld caused by the temperature differential at the leak point quickly and permanently sealing your AC Leak.

Red Angel AC Stop Leak & Conditioner

You can pick up BlueDevil Red Angel A/C Stop Leak online.

You can also find BlueDevil Red Angel A/C Stop Leak at any of our partnering local auto parts stores like:

  • AutoZone
  • Advance Auto Parts
  • Bennett Auto Supply
  • CarQuest Auto parts
  • NAPA Auto Parts
  • O’Reilly Auto Parts
  • Pep Boys
  • Fast Track
  • Bumper to Bumper Auto Parts Specialists
  • S&E Quick Lube Distributer
  • DYK Automotive

Pictures provided by:

Rain on Windshield: By Malinaccier (Own work) Licenense by Creative Commones via Wikimedia Commons Original Link

AC Button – By User:Mattes (Own work) [Public domain], Licensced by Creative Commons via Wikimedia Commons Original Link

5 responses to "Why is My AC Not Working?"


  1. Thomas Marshall on May 28, 2017 at 4:09 pm

    I have a 2005 Chrysler Pacifica why is my a/c not working I had it recharged and within one day it ran out can you tell me what is going on

    • BlueDevil Pro on May 30, 2017 at 4:13 pm


      Thank you for asking about your Chrysler Pacifica. If your refrigerant ran out within one day of a recharge, it sounds like you may have quite the leak on your hands. We recommend bringing the vehicle to an A/C specialist to pinpoint the leak, and if necessary, having the part replaced.

      Thank you!


  2. Keatin on June 10, 2017 at 4:32 pm

    I have a 2011 Chevy HHR. My Coolant Gauge in my dash display is at 0 meaning not working, the coolant temp on the digital readout in the dashboard display shows dashes across and the check engine light is on. I also found the my coolant reservoir is bone dry. my a/c is blowing hot air. it happened 2 weeks ago but all i did was remove one of the terminal wires from the battery waited 5 minutes then reconnected it again to reset the codes and everything worked out fine till today. can you help me resolve my issue?

    • BlueDevil Pro on June 12, 2017 at 10:53 am


      Thank you for asking about your Chevy HHR. Based on your description, it seems like you be may facing a couple of different issues, with losing coolant and having the A/C not functioning properly. We recommend bringing the vehicle to a certified ASE mechanic for a proper diagnosis. From there, you would have a better idea of what exactly would need to be done to the vehicle to get it back to form. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!


  3. cami on June 26, 2020 at 2:31 am

    I have read your blog its awesome.

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