Skip the auto shop - Our mechanics make house calls

Q: Hot air mixed with cold blows from air conditioning

asked by on

When my car has been sitting in the sun and is hot, instead of cold air coming from the air conditioning, I get hot air mixed with the cold from the two side air conditioner registers. When this happens, I have to shut down the two registers and switch on the extra air blower in order to divert the cold air to the center registers. The a/c duct in the back seat has no problem and it produces cold air at all times. I live in a hot climate where we have hot weather year round and I want to bypass all the hot water that goes to the cabin. How can I do this?

A: Hey there. You will most likely have to hav...

Hey there. You will most likely have to have a mechanic bypass the heater coolant lines to have this resolved. Your A/C may not be controlling the air flow inside the evaporator correctly out of the vents and may be the blend door actuator stuck in the heat position. Have the AC system diagnosed first before bypassing the heater.

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: I have a 1993 Toyota Camry sedan 4cyl. It stalled on me as I was driving down the road. I tried to start it and it will only run f

The vehicle may have spark and fuel but its not getting any injector pulse most likely. Try disconnect one of your injectors while hooking up a test light across the connector. Then have someone crank over the engine, you should...

Q: Car starts, then gets hot and stalls

Hello. It sounds to me like your AC has lost its refrigerant charge and should be tested for leaks. If no leaks are found, you should have a certified mechanic recharge the AC system to specifications. The overheating issue, to...

Q: Condesation in car problem

Hi! I assume that the problem you're having is with the drains under the windshield wipers being clogged and unable to release the water. It would make sense because, if the drains are clogged by the windshield wipers, the water...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...