Question about 2000 Chevrolet Silverado 1500

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Not cooling added 2 cans of r134a no change but the compressor seems to cycle off during acceration

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  • yadayada
    yadayada Aug 21, 2010

    IT IS SUPPOSED TO CYCLE OFF WHEN U ACCELERATE.

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You need to see a a/c tech you need to pull a vacume at the same time your adding R 134 and oil

Posted on Aug 27, 2010

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2 Answers

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

Replaced all A/C major components (compressor, filter-drier accumulator, and orifice tube) except condenser due to a seized compressor and failed clutch bearing. Flushed system and appeared to have no...


It sounds like you've done just about everything except to check if there is a bad or intermittent wire causing this or perhaps your low-pressure safety cutout switch is possible going bad causing the compressor to kick on and off?

Nov 01, 2013 | Lincoln Town Car Cars & Trucks

3 Answers

1995 jeep grand cherokee laredo A/C


if the compressor kicks on then it may not need gas, you may have another problem, caution dont blow up can or system, if the can is connected to low side and the compressor is running then it should take the freon.

Aug 06, 2011 | 1999 Jeep Cherokee

1 Answer

Ac not cooling. added about 2 lbs r134a, clutch is engaging, not sure if compressor is working.


2 Lbs. is a BUNCH of freon! Are you sure it is not over-charged? Are you using gauges? or just "guessing" how much to put in? Overcharging the system can not only cause the system to not work, but can cause extremely high pressure (400 Psi. or more) which can blow your hoses or other components apart. It is EASY to see if the compressor is working if the proper equipment is used.

Jun 11, 2011 | GMC Safari Cars & Trucks

2 Answers

Were di i recharge the ac on my car


if it is the 3.4 v6 the low side is on the passager side behind the motor. it should have a blue cap on it, and the low side is the fatter of the two ac lines

Aug 08, 2010 | 1994 Pontiac Grand Am

1 Answer

How do I remove the Ac oil in my 89 corvette when switching from freon to 134 . How much should be added and where?


I have upgraded or retrofitted older cars with r134a before with the ester oil and never had any problems with the refrigerant working with the old oil, as long as you put a few ounces of the new oil in.

The kit for r134a conversion from R-12 has everything you need to upgrade without removing all of the old oil.

Of course, in the early days of r134a conversion in the early 1990s there were people who recommended that you take the whole system apart, compressor, piping, receiver drier, etc. and replace the receiver drier and dump out the old oil.

In my opinion, this is a very expensive proposition, and good to excellent air conditioning can be had by following the R134a conversion kit instructions and installing 2 or 3 cans of refrigerant into your system.

This can be done by yourself.

Watch, if you're in California, you have to return empty cans of R134a to the store because they say that it is harmful to the environment and they want to keep track of it.

Good luck staying cool with R134a.

Jul 09, 2010 | 1989 Chevrolet Corvette

1 Answer

Adding R134A to my 1998 Jeep Grand Cherokee Limited


might be in the long run, but try adding the feron first, the system must have pressure in it for the compressor to come on, might take a can and a half before the compressor comes on, also sounds like you might have a leak, so look around when filling

May 17, 2009 | 1998 Jeep Cherokee

1 Answer

1996 jeep grand cherokee A/C not cooling


Put more in. Keep adding untill it won't take any more. You can't over do it with those cans. It'll either work or you'll find the leak if it really has one.

May 15, 2009 | 1996 Jeep Cherokee

1 Answer

No air on 93 taurus using 134a, compressor does not engage


you are probably low on freon again. If the system is low, the pressure switch won't turn on the compressor. Add a can of R134A using a hose that has a gauge on it. It should read in the "Good" area if you have enough freon. Adding a can will probably be enough to start it working. If so, look for a leak somewhere, usually around connections where O rings leak.
You will see some oil spotting where the leak is.

May 10, 2009 | 1993 Ford Taurus

1 Answer

No cool air when idling..


The refrigerant level may still be to low or the compressor is not working properly.

Sep 02, 2008 | 1996 GMC Sonoma

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