Skip the auto shop - Our mechanics make house calls

Q: new ac compressor now not energizing clutch

asked by on

my old compressor bearing went bad so i bought new compressor .i vacuumed system out .i have good seal no leaks.Well now ac compressor wont kick on.to add freon i manually cycled system with jumper wire giving power to compressor momentarily for 5 to 7 sec intervals.it blows clod when i do that.i have power to cycle switch .and jumped the output side of the female terminal to see if switch cycles or not .i have full power all the time .like it not turning off from the switch. and it still wont engage clutch so im stuck.i dont wanna keep buyin freon.can u help me

My car has 105000 miles.
My car has an automatic transmission.

Hello. From what you describe, it sounds like there may be some sort of issue with the clutch pressure / cycling switch. These switches are responsible for activating the compressor when they detect that the pressure is at or temperature has reached a certain threshold. If they are not functioning properly, or there is an issue with the circuit or wiring, then they may cause the system to malfunction. I would start by testing the switches to see if they may need to be replaced and going from there. If you need help having this scoped out, a certified expert from YourMechanic can come to your home or office to diagnose the AC system and guide your through a 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・Fair and transparent pricing

Get a quote

What others are asking

Q: Blower Motor works but A/C Shifts to Vent towards windshield when accelerating. Cruise control doesnt work. Vacuum Lines?

Hi and thanks for contacting Your Mechanic. The issue is there is a vacuum hose that is either burned with a hole or the hose is cracked. Open the hood and check for any vacuum hoses to the cab that...

Q: Gas smell upon fill up

A common issue on the Mustangs occur on the fuel tanks, there is a rubber gasket where the filler neck enters into the fuel tank. It can crack and the smell of fuel can occur as the tank is filled....

Q: Truck is bouncing

Sounds like you might need to replace your shocks. Shock absorbers do exactly that, they absorb the shock of the road as you drive. They keep the vehicle from bouncing all over the road. When the shock absorbers go bad,...

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...
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...