Skip the auto shop - Our mechanics make house calls

Q: Ac does not stay cool when on.

asked by on

My AC will be cold at the beginning of a commute and then blow hot air. The Toyota dealership says that I need a new ac relay and clutch assembly. Is that diagnosis worthy of a second opinion? Will a new ac clutch solve the problem or should the compressor be replaced as well?

My car has 199300 miles.
My car has an automatic transmission.

Sometimes the A/C compressor clutch will not engage when it gets hot due to the clutch coil going bad and losing the ability to engage the clutch. I do recommend a complete compressor replacement with the relay.

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: Mt car wont shift battery good not sure bout fuses alternator good wat shud i do

Prior to performing diagnostics be sure you have a fully charged battery that passes an actual load test. Then, confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting. If the immobilizer system...

Q: AC blows warm air, refrigerant was recharged.

Hi there. When the refrigerant was recharged, was the system evacuated and a vacuum test performed to ensure there are no leaks or moisture in the system? It sounds like the AC compressor may not be engaging. A blown fuse,...

Q: Why does my vehicle feel like it's being forced to move?

Hi there. If the engine continues to overheat after fixing a core plug leaking, then the thermostat may not be opening all the way and needs replaced. As far as the vehicle not wanting to move and seems like the...

Related articles

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...
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.