Skip the auto shop - Our mechanics make house calls

Q: Car temperature control only blows hot air

asked by on

I have my temperature control turned all the way to the left on the cool side but it only blows hot air. I don't know if this is a sign that my AC needs to be recharged. I have also heard it could be something called a blend door is stuck. Any advice for me? Maybe what it could be? Thank you

A: The A/C would need to be checked with gauge...

The A/C would need to be checked with gauges to see if it has refrigerant. If the temperature blend door actuator is broken, the A/C can be stuck in warm if that was the last position you had it in. You can put the A/C in defrost and temperature at the coldest setting and look and see if the compressor clutch is turning on. If one A/C line will be cold and the other will be hot if the A/C compressor is running. If you want to have this more thoroughly inspected by a professional, a technician from YourMechanic can come to your home or office diagnose your AC system to let you know what needs to be done.

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!

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: Oil light flashes when I push brakes

Hello. You don't indicate the mileage on your vehicle, but a high mileage or poorly maintained or abused engine could have low oil pressure from worn connecting rod or crankshaft main bearings or a clogged oil pump pickup screen. It...

Q: The climatic control is on one temperature all the time hot on drivers side cooler on passanger side the flap control moter for ho

A temp sensor malfunction could be causing your problem. If the controller is getting bad information, it's going to operate the doors according to that information. So a sensor replacement is indicated. However, these systems can also have problems with...

Q: How would a failing TPS sensor affect how my car runs...?

Hey there. Since the throttle position sensor is responsible for relaying information to the ECM and has a hand in trimming fuel / air mixtures, ignition timing, and other critical functions that control the engine's operation, a failing TPS sensor...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...