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A/c not working 05 buick lacrosse

A/c clutch doesn't engage.have checked fuse,swapped relays,which wire is high pressure and can i jump across this to see if it will work.thanks

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 147 Answers

SOURCE: 2005 buick lacrosse, Headlights not working.

it seem that all your vehicle have electrical problems. is better to make a electric inpection to the dealer.

Posted on Apr 05, 2009

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roniecon
  • 6826 Answers

SOURCE: 1996 Buick LeSabre AC Stopped Working

no this is a high side cutt out for compressor,,,,low side pressure switch is what ur looking for look on dryer it should be ther jump them 2 wires,if it kicks on add freon 85 on low side not running is about out but if the ac does work and gets cold plug sensor back up and if it doesnt work,unscrew switch and go blow it out with a air hose (compressed air)and tap it around /put it back and try it /if it doesnt fix it buy a new switch

Posted on Jun 29, 2009

  • 1348 Answers

SOURCE: 1996 lincoln towncar. No a/c compressor engagement unless jumped

the control unit is no good.i had a similar situation with a 98 tracker,and installed a switch to give it a ground for the compressor relay that comes from the a/c computer module.
it works good and goes on and off with the a/c switch.

Posted on Jul 18, 2009

  • 323 Answers

SOURCE: clutch won't engage on air conditioning compressor

The air gap may be too wide between the clutch disc and plate. It usually happens from wear. You can test this possibility by engaging the clutch electrically as you have done and then push on the disc slightly with the handle of a hammer or screwdriver. Be careful not to get your hand or fingers too close while the engine is running. Basically you are helping the magnetic field pull the disc in. I hope this helps.

Posted on Aug 19, 2009

  • 242 Answers

SOURCE: 1997 Linclon car No power to A/C clutch.

take the pressure switch connector off and jump connector- if clutch engauges you either have bad low pressure switch or are low on freon.

Posted on Aug 25, 2009

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1 Answer

97 chevy suburban AC clutch won't engage pressures


Looks like the low pressure switch gets power from a 10amp ac fuse. Power then goes to the ac relay which is powered on by the ac heat controller on the dash. Power then goes thru the high pressure switch to the compressor. The ac relay is grounded to the body. Do you have power on the lite and dark green wires going into the relay and is it grounded ?

Jul 26, 2013 | Cars & Trucks

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2000 Buick LeSabre a/c clutch will not engage. Fuse is good, can't tell if micro relay is ok or not, no power at compressor clutch plug when a/c is turned on. Are there other switches (full throttle...


There is a low refridgerant pressure switch, and a high refridgerant pressure switch. Either can cut the power to the clutch. You will have to check the pressure in the system to know for sure.
The electrical part in the clutch could be bad. You could run jumper wires to the clutch connector to see if it will engage. If not, its the clutch. If it does engage, then more than likely your just low on refridgerant, and possibly have a tiny leak.

Aug 29, 2011 | Buick LeSabre Cars & Trucks

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Replaced the ac compressor but now no power to compressor but have power to low and high pressure switches. checked relay under hood, relay and fuse in cabin. what am i missing?


Put a jump wire in the high pressure switch plug. If the compressor works. replace the high pressure switch. Let me know and we can go from there.

Aug 22, 2011 | 1999 Ford Expedition

1 Answer

Ac was working fine the night before. left the next mornng ac clutch will not engage. system was checked. freon pressure is good. checked fuses, all good . checked ac clutch fuse under hood . ok. replaced...


Check the low switch by the dryer or accumulator, its a long narrow cannister,

it will have a pressure switch attached to it or near it. put your, ac on high,

pull the molex off the switch and jump the molex with a wire or paperclip,

if the compressor comes on and the ac starts to cool, you will just need

to replace the low pressure switch, if the clutch does not come on,

check the low switch molex to see if there is 12vlts there. good luck!

Jun 28, 2011 | Buick Regal Cars & Trucks

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Got a 1999 Buick Century, AC stopped working so I filled up the FreOn and it didn't make a difference. Checked all Fuze's and Relays (to the best of my ability) still no change. There are no knobs, it...


Can't see filling with freon without compressor turning. Put jumper wire on high/low pressure switch harness to see if clutch engages. If so, bad high/low switch. If not,check power to high/low harness via fuse,relay, or dash control.Battery voltage applied to compressor if accessible will also engage compressor clutch and read your low side with your fill gauge. 30-35lbs is good

Aug 12, 2010 | Buick Century Cars & Trucks

1 Answer

Electric fans don't run, but checks Ok. Air condition not working. compressure checks Ok,but clutch not engageing but can jump wire clutch to engage. All fuses checks good,


FIRST IS CHECK ENGINE LIGHT ON....YOU SHOULD BE ABLE TO UNPLUG THE ECT... ELECTRONIC COOLING TEMP SENSOR.....A TWO WIRE SENSOR THAT TELLS THE COMPUTER THE TEMP OF MOTOR....WHEN THE MOTOR TEMP GETS HIGH THE COMPUTER GROUNDS THE COOLING FAN RELAY TO TURN FANS ON..IF FANS DON'T RUN WITH SENSOR UNPLUGGED THE GET A SMALL PIECE OF WIRE AND FOR A SHORT TIME SHORT THE TWO WIRES ON THE PLUG FOR SENSOR...IF IT DOES COME ON REPLACE SENSOR IF IT DOES NOT COME ON SUSPECT COMPUTER...ONLY IF ALL FUSES ARE OK LET ME KNOW

Sep 03, 2009 | 1994 Buick Century

2 Answers

Ok hear we go agian 2000 ford taurs 3.0 lit no a/c when i jump the compressor with a jumper wire. it works fine and i checked the high side swtich it works fine and the low side works ok to.


There are 3 likely problems:
  1. system could be air locked; when recharged, its possible more air than refrigerant was pumped into the system
  2. clogged or bad expansion valve
  3. AC clutch is bad; although it will engage when you jump it, the clutch could still be bad preventing it from engaging when you turn on the AC
Hope this answers your question. Best of luck.
Greg

Jul 31, 2009 | 2000 Ford Taurus

2 Answers

1996 Buick LeSabre AC Stopped Working


The first thing to check is if there is enough gas. The compressor will not work when the gas is low. There is a small inspection glass on the line. This needs to be clear. If you see streaks or bubbles means the gas is low. Never mind the pressure or wiring for now, Add one can of gas and this should get that first part done.

Jun 29, 2009 | 1996 Buick LeSabre

1 Answer

A/C clutch will not engage automatically


FIRST THOUGHT, I WOULD REWIRE THE LOOP EXACTLY LIKE IT CAME ORIGINALLY. NEXT YOU NEED TO CHECK THE LOW PRESSURE SWITCH LOCATED ON THE DRYER. YOU CAN DO THIS BY UNPLUGING THE SWITCH AD JUMPING THE TWO WIRES ON THE HARNESS. IF THE COMPRESSOR COMES ON, I WOULD SUSPECT THE LOW PRESSURE SWITCH TO BE BAD. LET ME KNOW IF THIS HELPS.

Jul 02, 2008 | 1996 Ford Explorer

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