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.

AC is not working Inspection $96.46 - $106.46 Get a Quote

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.

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

What others are asking

Displacement on demand not working.

The 8 to 4 system will automatically default to 8 cylinders if there is any problem that the ECM determines through its programming that it should disable the system. If you are having problems with the oil pressure sensor, it...

Will a bad battery cause my car to shut off and my EPS light to come on? What would cause it to come on?

Hi there. This is a serious battery problem if the battery is now swollen and has no power. There has been an obviously internal fault. This will cause the vehicle to power down and the EPS light to come on...

check engine light code p0068

The definition for the code P0068 is throttle body airflow performance. A few more things will have to be checked as this code can come from a failing sensor that is offering the computer improper signals. Consider hiring one of...

Sporadic misfiring, check engine light on sometimes

Hello there. If there is no cylinder specific misfire codes, it may be a random misfire situation. Without the exact code, I cannot give a precise answer for your specific situation but can offer a possibilities. The most common causes...

Will the steering column stop the dash from working?

If you have another key, try using that before investing into repairs. The most likely problem is the EIS - Electronic Ignition Switch, which is common as they age. As this is a costly repair, I suggest having a professional...

EGR warning

Hello. An EGR valve that is intermittently failing will cause the Check Engine Light to turn off and on. If the code is for the EGR valve and the voltages to the valve are correct, then the EGR valve may...

My engine is running too lean

Hi there. The high octane gas should not cause this; the new air intake definitely could, though. With more air entering the engine, the computer sensor readings are going to be thrown off. I would recommend that you first make...

I have a stutter when I am driving

The stutter, or vibration, could be due to an engine management (tuning) issue or is possibly caused by worn motor mounts that are allowing engine vibration to transfer to the body when the engine is under load. To evaluate the...

I have an 2002 Infiniti i35 which had a code reading “P0301” for bad coil

You will need to have the number one cylinder injector tested to see if it is getting signal from computer and cylinder compression to see if it has an internal engine problem. Then if these are okay then will need...

Related articles

P0392 OBD-II Trouble Code: Camshaft Position Sensor "B" Circuit Low (Bank 2)
Trouble code P0392 means there is incorrect voltage or waveform from the camshaft position sensor circuit in engine bank 2.
How a Battery Works With a Car's Electrical System
Have Have you ever wondered how your car’s electrical system works? It all starts with your car battery. Your car's electrical system operates on a closed circuit, with the main power system being the automotive battery. It uses less than...
P0802 OBD-II Trouble Code: Transmission Control System MIL Request Circuit/Open
P0802 means there is an issue with the Malfunction Indicator Lamp (MIL) often due too an faulty lamp bulb or corroded wires.