Q: Air conditioner not working after a battery change

asked by on December 01, 2016

Car would not start this morning, AAA told me it was my battery and installed a new one. I did not witness it, so I am unsure if anything else may have been disconnected. Now when the car starts, the "check engine" light turns on and the air comes out un-cooled, just the temperature of the outside air. When put to hot, the air does heat. What could be wrong?

My car has 83300 miles.
My car has an automatic transmission.

Hello. Thank you for writing in. At first, disconnect the battery and verify that all of the wires in the starting system and charging system are clean, dry, and tight. Make sure the battery cables are corrosion free, and have a clean and tight ground connection. Once the battery and its immediate circuits are verified, double check that no A/C wiring was interfered with during the original installation process. Its possible something was pumped or snagged. It also sounds like the A/C system may have lost some pressure. If the refrigerant has been depressurized somehow, the climate control will not blow cold air. Double check your battery and make sure it is perfect, before you turn to the A/C system.

Was this answer helpful?
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

Self replaced radiator in jeep liberty 2002 with air, hoses are good but coolant leaking from right side.... ?

Trapped air can prevent normal flow of coolant. As you refill the coolant, be sure any available air purge valves are open; that prevents air from being trapped. Once the system is refilled, if you have a leak, the source...

Jumpstarting does not start battery.

Sometimes a battery can be so undercharged that no matter what battery is trying to jump it, it just wont be enough. I recommend having your battery replaced or having a mechanic, like one from YourMechanic, try jumping the battery...

Engine is getting warm, heater is only blowing warm air when the vehicle is moving. 2003 Jeep Grand Cherokee

Hi there - this sounds like a possible thermostat (no allowing proper warm-up to operating temperature), or an inadequate water flow (water pump or clogged radiator) problem. The lack of heater function could have 5 causes: the engine is not...

Related articles

P2104 OBD-II Trouble Code: Throttle Actuator Control System Forced Idle
P2104 P2104 trouble code definition Throttle Actuator Control System Forced Idle What the P2104 code means P2104 is an OBD-II generic code for the engine control module (ECM) detecting a major failure in the throttle actuator control (TAC) system causing...
P0895 OBD-II Trouble Code: Shift Time Too Short
P0895 code means that there is an abnormality in the shift time between individual gears due to transmission blockage, failure, or dirty fluid.
P2188 OBD-II Trouble Code: System Too Lean at Idle Bank 1
P2189 P2189 trouble code definition The most environmentally friendly and power efficient air-fuel ratio is 14.7:1. The engine control module (ECM) is able to adjust the air-fuel ratio in limited increments if it defers from the 14.7:1 range. The P2188...