Question about 1988 Toyota Camry

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There's no voltage to the clutch when actvated. The compressor looks to be original and have a feeling that it probably needs to be replaced.

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No voltage to the compressor clutch is usually do to insufficient refrigerant gas in the system.
There is a low (refrigerant) pressure switch in series with the A/C clutch control - if the gas pressure is too low, it inhibits clutch control.

Get the system topped up with refrigerant and checked for leaks.
A UV visible dye can be included with the refrigerant top up - leaks are then visible using a 'black light' test unit.

Posted on Jun 17, 2009


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2003 Ford Windstar AC is not working. It only blows out hot air. The blend door act. works properly(We have already tested it). There are properly freon in the Vehicle. We are at a lost. Please help

Can you tell if compressor clutch is engaged? If clutch isn't engaged only the belt pulley will be moving and the compressor clutch is not engaged. If not engaged, no ac.

Can you check for applicable hvac codes? To check codes, your-self, at the least, you need an obd2 code reader, that will check manufacturer specific codes as well as po.

I haven't looked at your wiring, you could probably check voltage and ground for compressor, hvac on.6158ef87-8677-4b29-952a-e287698970b5.jpg
In the diagram, you see applicable fuses--clutch relay-- the top wire at ac clutch is voltage--black wire is ground.

Jun 22, 2016 | 2003 Ford Windstar

1 Answer

Kia sedona AC blows warm air

First check if compressor is rotating when AC switch turned on. If no, then either clutch failure or no power to clutch. You can follow the clutch wire up to the wiring harness beneath the crossmember covering the top of the radiator, stick pin in wire, check for voltage without major disassembly. If no voltage look for blown fuse. If voltage then clutch failure, must replace entire compressor.

If compressor needs replacement, then look for root cause. Most likely the suction line has a point of constriction or collapse. If so, its often visible if you know what to look for or feel for. Regardless, do not reuse a collapsed line and do not replace it with new KIA or OEM. Its a design defect. There is only one replacement that eliminates the point of constriction. It is only sold on eBay:

You can buy a new compressor and filter dryer together at Advance Auto Parts and get a Limited Lifetime Warranty on their "Tough One" brand. While they seem to honor their warranty, somewhat is disbelief of what is says, I have gotten a defective new compressor, so be aware that their quality may not be as good as their warranty.

You can remove old compressor and install new yourself if you can find a means or mechanic to remove and capture the freon down to zero pressure and after reassembly a means to run a vacuum for an hour. Illegal federal offense to dispose of freon to atmosphere. PRESSURE MUST BE TOTALLY REMOVED TO ZERO BEFORE DISCONNECTING THE COMPRESOR HOSES. "O" ring gasket connections must be flushly seated with no visible gap, otherwise will blow out upon refilling and you will have to start the vacuum process over again.

Most auto part stores and even BigLots ($6) sell freon in 12 oz cans with pressure measuring dispensor hose for refilling your system.

May 28, 2014 | 2002 Kia Sedona

1 Answer

I ust had the water pump replaced. Now my ac has gone out. I know nothing about cars but I do know that I hear a strange noise and the front part of the ac unit was turning and now it's not. It seems...

It is unlikely that the replacement of the water pump and AC failing are related, however ensure that the V belt is correctly positioned and under tension. The AC pulley should be spinning continuously by the V belt. The AC compressor is engaged by an electrically operated clutch within/behind the pulley wheel. If the pulley wheel is not spinning but the belt is sliding over it then you have a seized AC compressor and this will most probably need replacing. If the wheel is spinning but the AC compressor is not working (no cooling) then it is the clutch that is not engaging. This could be due to a worn clutch, failed clutch actuator, broken electrical connection, failed relay, broken fuse a failed interior thermostat (the car thinks that the 'set' temperature has been reached and so switches the AC off). To check, put the AC on the lowest setting and test the voltage at the AC compressor connection. If voltage is being supplied it is likely to be a failed AC clutch. There are lots of AC clutch repair videos on youtube and these should be a great help.

Aug 22, 2011 | 1999 Mercury Mystique

1 Answer

Compressor isnt turning at all dont know if i need new one or if i need new clutch how can i tell

The pulley on the compressor is always running when your engine is running, but the only time
it compresses the freon is when the clutch engages, if the compressor's pulley was not turning,
it would have already snapped a fan belt or your serpentine belt. voltage runs from your fuse box
thru your air condition switch on your dashboard to a low pressure switch that is located at the
accumulator a long cylinder,close to the firewall under the hood or close to the condensor, front
of the car. the switch detects freon pressure in the accumulator, if there is freon pressure, the switch
will stay closed and allow voltage to go to the compressor clutch to engage it and compress the freon,
if there is no freon pressure the switch will open, and there will be no voltage to air compressor, its a
saftey switch to keep your compressor from getting damaged.its possible that the switch could be bad
it may not have voltage at the switch, or it may be open because there is insufficient freon pressure.
check and make sure there is freon in the system.check for voltage at the low pressure switch if you have freon in your system and voltage at the pressure switch, set your ac on high, pull the molex off
the switch, and jump it out with a jumper wire, if the clutch engages and your car starts to cool, just
replace the switch. if the clutch engages but does not cool, then your ac system has some blockage
in the lines. if the clutch does not engage at all then it would be the compressor clutch. good luck!

Aug 03, 2011 | Buick Century Cars & Trucks

1 Answer

We own a 2000. Chevy venture van and the ac does not work. We looked at the fuses under the hood they are good, tried to fill the refridgerant it was full, took it to have it looked at they said its a...

I feel your pain. It sounds like its the clutch on the compressor. The fuse should be either in the fuse panel or some GM vehicles also have a remote panel under the hood with the heavy amp draw fuses in them. If the fuse it blowing, it means you have a problem and it is doing what it is supposed to.
If it is the clutch, it will probably be better in the long run to buy a new a/c compressor and put it on. It would **** to pay to have the clutch replaced and then also have a bad compressor.
You could put it on yourself and have someone service it because it needs to be vacuumed down to boil off the moisture when you open the system to the air. Also replace the accumulator. they are pretty cheap. The compressors are probably $200-300 and the accumulator are $30 or so.
Having said all that, take it to a good garage and they should be able to tell you exactly what is wrong.

Aug 12, 2010 | Chevrolet Venture Cars & Trucks

1 Answer

2006 liberty air conditiopner clutch doesnt engage. It has voltage to it

yikes. You chose to describe the most expensive part of the a/c system. Looks like you need a new a/c clutch which comes on a new compressor. A recovery recycling machine can evacuate the system and allow one to replace the a/c compressor.

Jul 22, 2010 | 2002 Jeep Liberty

1 Answer

Clutch on pump not engageing .no voltage to

If it's the A/C compressor you are looking at then the system is probably too low on freon to work and the control system isn't allowing any voltage to the compressor circuit because of this problem. If the compressor was allowed to run while the system was low on freon it would cause severe damage to the compressor which then can contaminate the remainder of the system. I would suggest having a service facility hook up to the a/c system and checking the state of charge. If' it's low or empty then the leak would need to be found and repaired to restore the a/c to normal operation. You could have an electrical problem somewhere but I would say that odds are it is too low on freon to work.

Jun 08, 2010 | 2000 Volkswagen Beetle

1 Answer

Compressor clutch wont engage. sometimes on sometimes off. now just off

Trace the clutch wires from the compressor clutch to the nearest plug that you can disconnect. With the engine running, and the AC set to max, check to see if the clutch is engaged. If not, unplug the clutch wires and check the voltage going to the clutch. If the voltage is around 12 volts or more, then your clutch is shot and you will have to replace the clutch and compressor (sold as one unit). If the voltage is low or zero, then your AC is not calling for the compressor to run...a pressure or temperature sensor in your AC is out. Hope this helps.

May 19, 2010 | 1991 Pontiac Trans Sport

1 Answer

My 2002 Expedition air conditioner will sometimes blow hot air and others cold air

I would check the following possibilities:
1. Is compressor clutch working? - You need to do this when the ac is blowing hot air only - locate compressor drive pulley on engine - rubber belt wraps around it. Start engine and set to max ac. When the ac is blowing hot air, look at the center of the compressor drive pulley using a good flash light - watch it for a while, it should be spinning with the pulley - this means the compressor is engaged. If not, the compressor is not engaged. If your ac is blowing hot air, then the compressor should be engaged and running (trying to cool). If it is not engaged, then your compressor clutch is probably going out. Could be low voltage to clutch, but more likely the clutch is worn out and only working some of the time. Note: if working normally, the compressor clutch will engage and disengage in cycles- but the air should always be cold. If clutch is bad, compressor would need to be replaced (sold as one unit). This is tricky to diagnose and could take some time - you need to do it when ac is blowing hot air but set to max cooling.

2. Low on refrigerant or refrigerant has moisture in it? If your ac blows cold initially after being off for a while, then heats up, and continues to regularly cycle back and forth between hot and cool air, then the system may be low on refrigerant or the refrigerant may have moisture in it that is freezing and restricting refrigerant flow. An a/c shop can check refrigerant level and even replace refrigerant if moisture is suspected.

Could be other issues, but I would start with these.

Good luck

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1 Answer

2005 toyota Sienna

short the low pressure switch that should actvate the clutch on the compressor allowing it to take refrigerant

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