Q: A/C button lights flash on/off randomly

asked by on

Just last year, I had the A/C unit replaced (my car doesn’t have climate control). This week, the A/C button lights came on and they flashed on/off while I was driving. Sometimes they will stay on and then I have to press the button to restart the unit. Then the scenario starts all over. Other times it will run for up to 40 minutes before the problem starts again. What will solve this?

Hello. It sounds like the system may be low on refrigerant. Once it is low enough the system will act like this as the pressure will be low causing the system to turn off and on. If you have a warranty on the system I would take the vehicle back to that shop. If I was going to diagnose this I would check the pressures first to see if that is the problem. It may be electrical but that is not as common. If you want to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to inspect what is going on.

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
  1. Home
  2. Questions
  3. A/C button lights flash on/off randomly

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: Passenger floor flooded with water from leak

There are a few different probable reasons why your Oldsmobile has a puddle of water on the passenger-side floor. Unless your cooling system is filled with only water, it is unlikely the heater core is the problem as there is...

Q: Door ajar light is on and the cab lights won't turn off while driving

Hi there. From the description you have provided, this is probably the result of a failed door ajar light switch. The door ajar switch is part of the door latch assembly. It may have to be replaced as an assembly....

Q: Q: Heater blows cold air

The AC system needs to have a performance check run. The AC compressor needs to be checked for operation and a set of AC gauges put on the system to help diagnose the issue. If the system is low dye,...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.