Skip the auto shop - Our mechanics make house calls

Q: Cold air turns hot

asked by on

The air blows cold, and then hot.

A: If your AC is blowing cold normally, then s...

If your AC is blowing cold normally, then starts going warm, it is usually an indication of the system having an electrical problem with the low pressure switch, or the AC compressor relay is not making contact to engage the compressor. On some vehicles, the compressor coil is known to not be able to engage the clutch due to the clutch air gap being too large, or the coil becoming weak when it gets hot. These are all pretty common and would require further diagnosis. I recommend having a mechanic, like one from YourMechanic, inspect your entire AC system to see which of these components has failed.

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: What tips should I follow with the air conditioner?

Your car’s air conditioner and heater are largely self-monitoring, but there are a few things that you should know. If the automatic climate control system is operating and it’s very warm, you may notice fog/mist coming from the...

Q: Catalytic converter replacement

Hello. It's quite possible that there is no one at fault here. It may just be unfortunate timing. I'm assuming that you have had the codes read and that is why you have decided you need to replace the catalytic...

Q: Step by step troubleshooting of DTC fault codes

Each of these codes are for different components and since you swapped the motor with a different size motor than what the car had may be a big problem. You would need to have each code diagnosed separately to see...

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...
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.