Skip the auto shop - Our mechanics make house calls

Q: I am trying to recharge the refrigerant for the A/C but I have been unable to find what the pressures are supposed to be.

asked by on

I am trying to recharge the refrigerant for the A/C but I have been unable to find what the pressures are supposed to be. What are the exact pressures supposed to be in order for it to work properly?
My car has an automatic transmission.

A: Hello. A/C pressure readings vary with the ...

Hello. A/C pressure readings vary with the temperature. The A/C system should be charged by weight and not by pressure to fill it correctly. There should be a sticker located under the hood (either on the underside of the hood, radiator support or strut tower) that indicates the capacity of your A/C system - usually in ounces. You could also try finding the capacity in your owner’s manual. If you need help having this taken care of, a qualified pro from YourMechanic can come to your cat’s location to perform an AC recharge.

Was this answer helpful?
Recommended services
Get a Quote

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: My car tries to start by then just turns off. 2005 Ford Freestyle

If the fuel pump is good, but is not pumping fuel then it is usually due to an issue with the inertia fuel cut off switch. This is located under the dash. It is designed to cut fuel off to...

Q: How do you use the heated seats?

If your Altima is equipped with heated seats (only available on certain trim levels), this system can provide additional comfort, particularly during cold weather. Using the system isn’t particularly difficult, either. Here’s what to do: Locate the heat seater...

Q: passing gear not working

The transmissions in these vehicles have a long list of possible causes for the concern that you are having. They include the valve body not controlling the down shift and the valve body needing to be removed and cleaned out...

Related articles

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...
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...