Skip the auto shop - Our mechanics make house calls

Q: AC works well briefly, then blows warm

asked by on

Hi, I need some advice on what to do with the air conditioning that works well only briefly. Then the light begin to flash and it starts malfunctioning and only warm air comes out. If I restart it, it would work well again but only shortly. I filled it with the refrigerant coolant but it didn't solve the problem. I had the relay checked and it's good. What should I do? Thanks.

A: Hello there. A few different things can cau...

Hello there. A few different things can cause the AC to shut off after a short while. The first being an overfilled AC refrigerant. When this occurs, the pressure in the system rises too high and causes the AC to shut off. Another possible cause is the AC high pressure switch itself failing. When this happens the car will shut off the AC thinking that the pressure is too high. A qualified technician like one from YourMechanic will be able to diagnose your AC problem and perform any repairs that may be required.

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: AC is not blowing cold air - 2010 Buick Enclave

Hello and thank you for contacting YourMechanic. The noise you are hearing is the serpentine belt burning on the A/C clutch pulley from the A/C compressor being locked up. Open the hood and with a flashlight look at the A/C...

Q: Rough idling after sitting for a few days

Hello. If the ignition coils are misfiring, this could cause the spark plugs to misfire and the car may idle rough. If this is the case, the ignition coils will need to be replaced in addition to the spark plugs...

Q: My engine light came on code shoed P0037 its a Lexus is300 is it just changing the o2 sensor?

P0037 is an oxygen sensor code referring to bank 1 sensor 2. This is the right hand side of the engine and the second sensor on that side. The code may be caused by the catalyst on that side or...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...