Skip the auto shop - Our mechanics make house calls

Q: Dual AC not working correctly

asked by on

My car has a dual air conditioning and it's been malfunctioning lately. There would be cooling on the driver's side, but the vents on the passenger's side doesn't blow cool air. How can I fix this?

The charge level of the refrigerant may be low. If the refrigerant level is low then what could be happening is that all of the heat transfer capability of the refrigerant is maxed before the refrigerant can flow to the outlet side of the evaporator. The system needs to be recovered and the charge level determined.

If the system is low on refrigerant, then a leak check needs to be done to ensure there is no leak that caused the low level. Once the system is repaired of any leaks, then the system needs to be brought to the appropriate refrigerant level. You may want to enlist the help of a mechanic, such as one from YourMechanic, who has the knowledge and expertise to diagnose and service your AC 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

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: Random misfires

Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...

Q: A/C issues

When you do not have the A/C on, you will have pressures on the low and high side be at about 90 to 105 on both sides. When you turn on the A/C with engine idling, the low pressure will...

Q: The transmission is slipping.

Hi, thanks for writing in. It seems that the clutch disc is most likely worn to the point that the pressure plate cannot fully engage and lock the clutch to the engine. If that is the case, you will need...

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...