Skip the auto shop - Our mechanics make house calls

Q: Ac not blowing cold air

asked by on

My ac is not blowing cold air when I turn it on it blows the hot air so would that mean it needs to be recharged ? Or change a filter? And how do I know if the compressor idols working ? you

My car has 122200 miles.
My car has an automatic transmission.

An AC system that blows warm could have several faults. The first and most suspected is a low system charge. If the system is low, then there is most likely a leak somewhere and recharging only prolongs the inevitable: the repair. The compressor clutch that engages the compressor could be inoperative. This could be caused by a failed clutch coil, relay, fuse, wiring harness, or AC amplifier (Toyota’s term for ac computer). A quick visual will tell you if the clutch is engaging; with the engine running and the AC on, confirm that the compressor is indeed turning with the engine. If the clutch and compressor are turning, then the clutch circuit is working; a failing compressor will still turn, but not produce correct system pressures. A failing air mix servo could be a cause as well. Adjust the temperature setting to max heat then to max cold and see if the temperature does indeed change accordingly. If the temperature of the air coming out of the vents changes accordingly, then the servo is operating properly. I strongly suggest having a qualified technician perform an inspection to determine the precise failure and avoid replacing unnecessary parts. Your Mechanic has several technicians available that can assist you with an AC blows warm inspection.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Ac not blowing cold air

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: 2003 camry ac circuit needs replacement

Hi There, Depending on what your mechanic was referring to with respect to the AC system, there are a number of possibilities that may cause problems within the A/C system. Several components make up the entire "A/C circuit." The locking...

Q: Check engine light, VSC light, and TRAC OFF light is on.

Hi there. There's always the possibility that something may have been damaged in a collision. On your estimate, you stated that it read "actuator removal without traction control". This is simply for estimating purposes; the adjuster that created the estimate...

Q: My Battery Charge System Light is on. Has my alternator or battery gone bad?

There are two key tasks in a charging system diagnostic initially: one is to measure the output of the alternator, at the battery terminals, and compare that output against the factory specs; and the second is to load test the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...