Skip the auto shop - Our mechanics make house calls

Q: Thermostat problems

asked by on

The A/C in my car blows only hot air. The thermostat was working great until last week. Now when it gets to 80 it starts blowing the hot air. What is causing this and can it be fixed?

A: There are a few common causes for the AC bl...

There are a few common causes for the AC blowing hot air, the most common is that the vehicle is low on refrigerant, other causes could be the blend motor has failed or the compressor is not working properly. A qualified technician like the ones at YourMechanic will have little trouble diagnosing this AC issue and performing any required repairs.

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: Car overheating because of bad thermostat

It sounds as though the thermostat is stuck closed; the fans may not come on until the flow is restored. They would need to be tested after the thermostat is replaced. I recommend having a mechanic, such as one from...

Q: Feels like it has no power

Generally, the "symptom" you are describing reflects an ignition and/or fuel system issue including all of the many sensors that control these systems. An expert would use any DTC's (diagnostic trouble codes) to hone in on the issue and identify...

Q: Key hard to turn; car starts and turns off

It sounds like the ignition lock assembly may be damaged. This is the part that the lock cylinder goes inside and may need replacing. There seems to be a recall on the ignition switch for this car. I would take...

Related articles

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...
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...
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...