Question about 1997 Chevrolet Blazer

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Bleed a/c how do I bleed r134a

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WHY WOULD YOU BLEED YOUR a/c gas? usually the problem is trying to keep them charged..

Posted on May 12, 2014

Testimonial: "1. I know squat about a/c. Compressor cycling every few seconds. Air cool but not cold. When I connect canister with guage it reads well into the red. Thought maybe high pressure causing problem. Help..."

  • desertracer May 13, 2014

    Could be high pressure.. bledinnot really over filled the system.which is hd to do.. more likely a bad expansilon valve. or damaged pipes or hose.

  • desertracer May 13, 2014

    Sounds like you need to go to a a/c repair shop. There are usuall small shops around who will give you a dianoisis and a quote to repair. they might be able to answer your problem for free or very little money.

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Compressor cycling too fast


you cant guess at the pressure in the system. and its not a good idea to bleed off any r134a. it is now known to be a powerful green house gas. so should be recovered. however its easy to see what the pressure is. there are low cost gages that come with some r134a kits. that will likely tell you the pressure is low. typically that's what causes the compressor to cycle. there is likely a leak somewhere .. the r134a molecule is very small and its hard to keep things from leaking. you can use soapy water around the crimped rubber hose ends and connectors. that's what usually leaks. there are two ports on the air conditioner .. a high pressure and a low pressure .. the low pressure port is what you add fluid into. its just a valve similar to a tire valve. if you were to push the valve open then refrigerant will vent just like a tire .. but don't ever do that with your finger. it will freeze. unfortunately you will also be venting oil that flows along with the fluid. that can damage your system. if you vent too much then your system will have to be put on a vacuum pump to start over.
1. check for leaks with soapy water. look for bubbles while the system is running. look for oily spots that might indicate a leak.
2. check the low pressure side for proper pressure. chances are it will be low indicating not enough r134a
3. repair whatever is leaking before refilling. use the gage to determine when properly filled.

the system has a pressure switch that makes sure their is always enough pressure on the low pressure side. that's because if the pressure gets too low there is danger of sucking in air and that will damage the system. so if the pressure gets below a set value then it shuts off the compressor. the pressure builds back up and the compressor comes back on then again the pressure drops as the system builds up. that's why it cycles fast . there is not enough fluid to keep minimum pressure while operating. if you have too much r134a then typically it will work but will probably blow out a hose. adding fluid to a leaking system will only make it work until it leaks back out .. sometimes that can last a year or a day, depending on how bad the leak.

May 12, 2014 | 1997 Chevrolet Blazer

1 Answer

Trying to locate ac areas on a 2004 kia sedona ..I'm sure it just needs a shot of r134a...I have the 16oz bottle with gauge...just don't know where to bleed and install


being an 04 there is a reason ur a/c isnt working. even if it is because its low on freon that means that it leaked out and the leak needs to be fixed b4 adding freon

Aug 07, 2011 | 2004 Kia Sedona

2 Answers

The air is blowing out hot. how fo i fix


If the a/c compressor clutch is not engaging, then the freon or r134a pressure may be low.

Pressure on the low side should be 25 psi to 45 psi.

Since your car is a 1990, it may have been made before r134a was used and may require an r134a retrofit kit that includes oil, r134a, and adapters to update the a/c.

R12 used to be used but is very expensive and requires a certified techncian and recovery and recycling equipment to use, and probably would leak out faster than the r134a system.

Aug 10, 2010 | 1990 Chevrolet Corvette

1 Answer

What kind of refridgerant do you use for the air conditioner


in 93 you could have R12 or R134a ... R12 is now illegal to use for most cars .. so you would have to have your system retrofitted so it can use R134a ... you can see what kind you have by looking under the hood .. there should be a plaque that tells what kind and how much the system holds .. the R134a systems have a special larger filler port and that is easily recognized by anyone familiar with auto air conditioning .. so just a look will tell them ... R134a is known for slow leaks .. its a small molicule so leaks easily .. the compressor will stop when the pressure gets down too low ..thats to prevent damage .. for now anyone can purchase r134a and many people add it themselves but the law specifies that only certified people can do work on air conditioners .. R12 and R134a are not compatable so you cant mix them .. no matter what the only refridgerrant you can use is R134a ..

Jun 30, 2010 | 1993 Dodge Spirit

3 Answers

What refrigerant do i use for 2000 grand cherokee


134a. which is used iv all vehicles after 1995

Jun 03, 2010 | 2000 Jeep Cherokee

1 Answer

Did 1997 ford use the old r22 freon or the new r134a?


R134A. The R22 to R134A conversion was done in 1993. I ran into this when I bought a 93 Silverado a few months ago.

Apr 22, 2010 | 1997 Ford Thunderbird LX

1 Answer

What is the refrigerant use in xj6 jaguar 1995


If it has screw on fittings then r12. If the fittings are quick disconnect type then it takes r134a. I would do a r134a system conversion if needed because of the availability and price of the r134a refrigerant.

Apr 08, 2010 | 1995 Jaguar XJ6

2 Answers

What do I need to replace to convert my ac to r134a on a 88 chevy s-10 blazer


need to have the a/c system evacuated and flushed out with the appropriate cleaner.Replace the orifice tube and drier, and purchase a retrofit kit at any parts house. Recharge system with appropriate amount of oil charge and freon. It will take less R134a than it did R12.

Sep 03, 2009 | 2001 Chevrolet Blazer

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