Skip the auto shop - Our mechanics make house calls

Q: Air conditioning blowing air speed is suddenly decreased - even though I am keeping the full speed it's not blowing sufficient cool air

asked by on

When am going for a long drive my air con fan speed goes down.Even after increasing the FAN speed.It is not throwing sufficient air and cooling.After few minutes if i switch off the ac for an hour and switch it back ON it is coming to normal functioning mode

A: The a/c evaporator is most likely freezing ...

The a/c evaporator is most likely freezing over until it restricts air blowing through it. The most common possible causes depending on the model of vehicle you have are: the cycling switch, temperature probe, expansion valve, or electronic control problems that will not let the a/c compressor cycle out. I would recommend having this a/c issue checked by a mechanic, like one from YourMechanic.

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・Save up to 30%

Get a quote

What others are asking

Q: A/c blowing cold air intermittently with warm air

Hello. If the system continually blows hot and then cold, this is typically caused by a failing blend door actuator. If it fails, it can allow the temperature door to not hold the right position. It can also be caused...

Q: Car losing power, have to stop and restart

The ESP light is for the traction and stability control. If you are seeing this light come on before the throttle system activates then you most likely are having a problem with the ABS system. There is an open recall...

Q: Please what gear oil is best for my Hyundai sonata 2005.

As you may know, there are a multitude of engine oils on the market all claiming to be the "best" and prolonging the life of your car's engine. One of the main questions you will be asked when changing your...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...