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: Engine overheats, heater blows out cold air, coolant boils in radiator

Sounds like multiple problems here. I would first correct the "no heater" scenario. This is likely the heater control valve not allowing what is clearly hot water into the heater core. The reason for correcting this first is that it...

Q: Car wont move

If the clutch has completely failed, it's definitely possible for it not to turn any wheels when in the air, just because the resistance in the drivetrain alone is enough to keep them from moving. With a working clutch, the...

Q: leakage

Hi there: It's possible that you have a broken fuel line either inside the engine compartment or near the fuel cell. A broken fuel line can be a very serious safety issue, so you might want to have a local...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...