Skip the auto shop - Our mechanics make house calls

Q: Air conditioning on high caused radio turn off, gas gauge to empty,warning lights on

asked by on

I was sitting in a hot grocery store parking lot and turned the air conditioning on high. The radio went off, the gas gauge went down to empty and some of the warning lights came on! I turned off the AC and the lights turned off. What could be the cause of this?

A: The most likely cause of this is a battery ...

The most likely cause of this is a battery with a failed cell, alternator, battery cable or the AC compressor itself. If the charging system has a fault, it will not be able to support all of the car's systems, such as the radio and the AC. The AC could also be the cause itself, as it could have caused a drag on the system, which can cause faults as well. A qualified technician, such as one from YourMechanic, will have little trouble performing any diagnose your electrical issues and perform any repairs that are needed.

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: Tire pressure light came on while driving to the airport.

Your tire pressure system uses sensors in each tire to signal the pressure in the tire. The sensors are known to go bad and will cause the system to see it as a pressure loss. This does not mean you...

Q: Advice on installing electrical fan on a '96 F-150

Sure, you should add it. It's a '96, it's 20 years old, get the biggest electric cooling fan you can find. You can just get it wired and setup the relay and toggle switch. Then you can turn it on...

Q: Car stalls when decelerating and/or going over bumps, especially speed bumps.

The most common cause of this intermittent stalling is due to a few potential problems. The most common faults would be: a wiring fault failing fuel pump an open or short in a sensor Intermittent issues can...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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.