Skip the auto shop - Our mechanics make house calls

Q: Need AC temperature actuator replaced.

asked by on

I had an AC temperature actuator replaced around a year ago and now I think I might need a new one replaced. While I was driving, the AC stopped blowing cold from some of the vents. If the car is turned off and back on, it seems to correct the situation sometimes.

A: Hi there, AC blowing cold from some vents ...

Hi there, AC blowing cold from some vents while warming up in other vents may be an indication of a low refrigerant charge level. This is what is likely happening due to low refrigerant level: The air passing over the fins of the portion of the evaporator where the refrigerant enters will be cooler than the air passing over the portion where the refrigerant exits due to the low refrigerant's inability to cool all of the air passing through the evaporator fins evenly. This will mean you have distinct differences in air temperature coming out of the various vents. To check this you may want to enlist the help of a qualified technician, such as one from YourMechanic, who will have the necessary equipment to:

1) Determine the AC refrigerant level and compare it to the charge level specified by the manufacturer.

2) Perform a leak check to either ensure system integrity or find a leak in the system.

3) Make necessary repairs and recharge the system to the correct charge level as specified by the manufacturer and performance test the system.

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

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: What Causes a Car's AC System to Rattle When It Is Turned On?

The cause of the rattle will depend on whether it is coming from inside the car or under the hood. Typically, a rattle would be associated with the compressor and underhood components. Let’s take a look by starting under...

Q: Transmission making clunking and banging noises - 2005 Chevrolet Avalanche 2500 V8 Automatic

Check for problem codes - you mention that the Check Engine Light is on. This could be the torque convertor clutch not releasing as you slow down, or not locking up smoothly when you reach 40-50 mph accelerating. And yes,...

Q: Traction light/reduced engine power and check engine light coming on

Hello. From what you describe, it would appear that your vehicle may be experiencing some sort of intermittent wiring or sensor issue. If the problem occurred again after driving over a bump, then it may be possible that a damaged...

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.