Skip the auto shop - Our mechanics make house calls

Q: My air only gets cold while I'm driving. What's going on?

asked by on

My a/c is only cold while I'm driving and pushing the gas. If I'm sitting at a red light it's hot air.

My car has 116000 miles.
My car has an automatic transmission.

A: Hi there. One of the most common causes of ...

Hi there. One of the most common causes of the symptom you’re describing is when you have a bad or failing AC high pressure hose. The high pressure hose is designed to increase and decrease AC pressure during different driving conditions, since the AC drive belt will increase in speed as the vehicle accelerates.

Basically, the AC high pressure hose is kind of like a turbo for your AC - it supplies more pressure when you’re idling and less pressure when the AC motor is being driven faster while you accelerate.

However, there could be other issues that cause this problem, which is why it’s a good idea to have a local ASE certified mechanic stop by and properly diagnose the AC system for you. Good luck with your 2006 Kia Sedona!

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・Fair and transparent pricing

Get a quote

What others are asking

Q: My car only overheats when ac is on?

If you have overheating only when you have the A/C on then you most likely have a bad fan clutch. The fan clutch should lock up when the added heat from the A/C is added from the condenser to the...

Q: Car quit while driving then started back up. Went dead again. Would not start back up.

Hello. If you are having power supply issues, you need to first suspect and test your battery. For the testing of your fuel pump, you can connect a battery charger while you are diagnosing your fuel pump. I certainly would...

Q: While filling fuel in tank its flooding i.e can't fill in full speed usually it take around 10-15 Min for filling 50 Ltrs gas.

This is likely related to your EVAP emissions system and something called a purge solenoid. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors...

Related articles

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.