Skip the auto shop - Our mechanics make house calls

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?

A: Hello. It sounds like the system may be low...

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?

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: Gas line out of position

If the line is out of position and causing a leak I would agree that it is unsafe to drive. If it is leaking the fuel line will require replacement. Ensure that this service is performed by a qualified professional as...

Q: Audi a1 glow plug light come on then goes offi

Hi there, thanks for writing in about your Audi A1. If the light is coming on that often then there may be a particular filter issue. I would need to scan the computer to see what codes are present. If...

Q: How do I adjust the remote start front defrost?

When the remote start front defrost feature is turned on, your front defroster will begin operating when the engine is turned on via remote start. To turn this feature on or off, follow these steps: 1. Press the Up/Down buttons...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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...