Skip the auto shop - Our mechanics make house calls

Q: A/C won't work, even after compressor replacement

asked by on

The a/c has stopped working this week. Whew! It’s 98 degrees outside! Our mechanic used a diagnostic tool on it and reported that our vehicle needs a new compressor. He replaced the old one and still the a/c won’t work at all. What will fix this?

A: It will depend on the nature of the issue. ...

It will depend on the nature of the issue. If the compressor is not kicking on then the compressor control circuit needs to be looked at. If the compressor is turning on then the refrigerant circuit needs to be looked at. This will require manifold gauges to be installed and the system to be run to determine what the issue could be. Possibilities range from an improper charge level, to a failed component in the refrigerant system, to a faulty condenser fan. It will all depend if the compressor is switch on. You may want to enlist the help of a mechanic, such as one from YourMechanic, who has the certifications and equipment to diagnose the cause of the AC issue and then recommend or make the repair.

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: Ac not cold

Quite often, issues with maintaining cold air flow with an air conditioner are due to a commonly overlooked issue - charging AC refrigerant. Although most vehicles (like your Toyota 4-Runner) have a closed-loop AC, when a leak occurs and...

Q: Radio does not work except for satellite radio

Sounds like the radio head unit is faulty. There are no serviceable parts, so replacement is the only option. You may want to enlist the help of a mechanic, such as one from YourMechanic, to access the radio and pull...

Q: What is the truth about brake rotors/brake jobs?

Hello. The rotors on most cars have a minimum thickness that they can be before they should be replaced. The minimum thickness is stamped into the rotor. The rotor can then be resurfaced until it gets too thin and should...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.