Skip the auto shop - Our mechanics make house calls

Q: AC blowing cold air on right side only

asked by on

The AC is not working. Only the right side gets cold if you are driving at a fast speed. In addition, the temperature gauge is reading hot, but the car doesn't overheat.

A: Hello. The AC may not be working because, i...

Hello. The AC may not be working because, if the car is overheating, the AC may be shutting off to avoid adding heat to the cooling system and engine. A scanner should be connected to the car to see if there are any codes present, and the data monitored. The data from the engine can be compared to an independent source, like an IR thermometer reading at the thermostat housing and radiator. Only then can it be determined whether the engine is overheating. You may need the aid of a mechanic, since an overheating inspection involves working around a hot engine and cooling 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: When the hot air is turned on, the drivers side blows cold and passenger side blows hot.

Hi there, thanks for writing in. On most imports and some domestic cars, there the AC blend door distributes the air to different vents when the option is selected. This component is controlled by an electric actuator. Sometimes the fuse...

Q: Engine switch off

Hey there, thanks for asking about your 2005 Smart Fortwo. When a car overheats in traffic, it's a pretty sure sign your cooling fans are not working. You can test this by letting your car fully warm up and observing...

Q: Car overheats while idling

It sounds like you may have a problem with rust an scale build up in the engine. This build up may have worn the impeller on the water pump and this is why it only overheats at low engine RPMs....

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...
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...