Question about 1998 GMC Sierra

1 Answer

After replacing a high pressure switch on my 98 gmc sierra a/c

The auto technician said the compressor is toast, because, he said it wouldn't take charge, the unit will not kick in

Posted by on

  • marcial adorno
    marcial adorno May 11, 2010

    explain in more details

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 142 Answers

Take your truck somewhere else... "wouldn't take charge" doesn't even make any sense... The A/c system on any vehicle has 2 switches, high pressure, which is a "fan request/safety" switch that turns off the compressor clutch and turns on the engine fan in electric fan applications when refrigerant pressure reaches around 300 PSI to drop the pressure and complete the refrigeration cycle, and the low pressure switch, which basically doesn't allow the compressor clutch to run if the system is low/empty of refrigerant (turns it off under about 10-20 PSI). My guess is, if he couldn't get the refrigerant back in the system, either his a/c service machine was malfunctioning, or he didn't know how to use it... I've seen a LOT of both on the field... I'm sorry to say there is a lot of people working on automotive A/c out there that don't really know what they're doing, but sincerely believe they do... Short of giving you a definite answer, i'd get a second opinion on that before spending any good money on a compressor (which are usually pretty pricey)

Posted on Sep 08, 2009

Testimonial: "Yes, you are absolutely right, I checked the compressor by hand, turned it by the clutch and it feels very good, has normal compression and will work."

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How to tell if my cluch relay is bad for air compreser on a 2003 gmc sierra 1500 4.8?


Easiest way is to swap it with another relay. If the compressor still does work. Two common causes are low freon and a bad high pressure switch.

Feb 23, 2016 | GMC Cars & Trucks

1 Answer

1999 GMC air cond. AC clutch wont engage. system is charged. relay, fuze,and low pressure switch are replaced.


ac compressor clutch coil open or short. wire cut or open to ac clutch.2 wires one is ground the other power, remove connector ac compressor then probe with test light between the two wire

Aug 05, 2013 | 2003 GMC Sierra 1500

1 Answer

Drl work but i when switch the lights all the way on i dont have low or high beams? could this be a fuse, bulbs out or bad switch?


Most likely the switch. If the fuse were bad, the lights wouldn't work all together. Have the switch tested and replace if neccessary.

Oct 17, 2012 | 1997 GMC Sierra

1 Answer

On my 2004 gmc sierra 1500 the compressor cycles on and off. i tried to add more freon but it would not take the freon so i changed the low pressure switch but still doing the same thing. could the orfice...


When the compressor kicks on, is the air from the vents blowing cold? If the air isn't blowing cold, then your problem could be that you may have water in the system. I had a '93 Chevy Z71 that wouldn't blow cold and thats what my problem was. System needs to be evacuated and refilled. Good luck bro.

Aug 14, 2012 | 2004 GMC Sierra

1 Answer

Clutch on comp will not engage tried jumping checked frion have 150 on high side 55 low side checked fuses even unpluged high pressure switch on back of comp.


if the Ac compressor clutch isnt engaging even with a hot wire then the solonoid has packed up if does engage then it could be a pressure safety switch although i would empty the system with my machine and weight the gas i take out as if less than 150 grms then it will not work ,never mind the pressure its the weight of gas in the system that makes the switch allow the compressor come on

Jun 07, 2011 | 1999 GMC Sierra

1 Answer

How much refrigerant does a 1993 gmc sierra take.


There is surely a specified quantity if the system is completely exhausted which they normally aren't.
Intake pressure (on the low-pressure side) to the compressor is monitored and best measured with low-cost fill-kits that have a gauge and simple instructions on where to connect it and which pressure should be obtained. The kits and coolant can be had at any chain auto parts store.

Aug 07, 2009 | 1993 GMC Sierra

1 Answer

I have a 99 gmc truck and the a/c cuts off while driving down the road, replace control head, high pressure switch and low pressure switch and the a/c compressor relay any suggestions


Did you change the orfice tube,it should be found somewhere in the front around the radiator.It may be clogged.Do you live in hot climate,then change it for sure.

Jul 23, 2009 | 2000 GMC New Sierra 1500

1 Answer

I have a 1999 GMC 3/4 ton truck. My air conditioning doesn't work


if it is low on freon the compressor will have 0 volts becuase the low pressure switch on the evaporator isn't triggering...if you have freon then replace the low pressure switch...take a small piece of wire and disconnect the low pressure switch and jump the two sides of the plug together...compressor should come on

Jun 04, 2009 | 1999 GMC Sierra

1 Answer

1998 GMC Sierra- runs rough then stalls when


had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!

Jun 04, 2009 | 1998 GMC Sierra

1 Answer

1999 GMC Sierra a/c clutch replacement


Sounds like it is more likely the high pressure switch on the accumulator acting up (a common issue with older vehicles). To verify this, try putting 12v on the clutch with a jumper (but only for a few seconds each time) to see if it engages. If it is the pressure switch, you may have to replace it and the schrader valves as well.
If the problem is an electrical connection in the clutch, yes, it can be replaced without removing the compressor but that must be done very carefully.

Jun 13, 2017 | GMC Sierra 1500 Cars & Trucks

Not finding what you are looking for?
1998 GMC Sierra Logo

496 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...