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Air Conditioner not working

Tiny
95COROLLA
  • MEMBER
  • 1995 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 398,000 MILES
My A/C turned off the other day while I was using it. It had been operating normally up to that point. The indicator light in the On/Off button is off. I hve the Toyota Svc Manual and checked the 3 A/C relays and fuse which are located in the box on the front right side (as looking fro the front of the car). The one that is in front of the box which contains all of the other fuses for the car. I hve taken the relays out, applied a voltage source to the coil terminals and measured for continuity at the contact terminals. This part all checked out. I also performed a continuity test on the On/Off switch per the svc manual and this also checked normal. Lastly, there is one wire w/connector which comes out of the A/C Compressor which plugs into a wiring harness. I unplugged the wire and tested for voltage at the connector on the harness side and found none. I checked the resistance at the wire coming out of the compressor and it measured zero (not infinity). Is there anything else I can check? Or do I just bite the bullet and take it ito the local Toyota dealer? Tnx in advance for any help/and or suggestions you can give me.
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Monday, August 25th, 2008 AT 1:58 AM

29 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi 95COROLLA,

It sounds like the system is low on charge but to be sure here are two guides to help us fix the problem

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

and

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down these guides and report back.
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Monday, September 1st, 2008 AT 9:41 AM
Tiny
ZANYJB
  • MEMBER
  • 1 POST
Thanks for this post ( had this problem and had to recharge the system cost me $43.00 all fixed!
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Monday, April 29th, 2019 AT 2:33 PM
Tiny
GUILLEBOCCARDO
  • MEMBER
  • 1 POST
  • 1995 TOYOTA COROLLA
  • 4 CYL
  • AUTOMATIC
  • 150,000 MILES
Hello, I have a Toyota corolla 1995, the ac is not working. When I turn it on I can see the ac light turning on for seconds, then goes off. A specialist in AC told me was not the compressor nor freon nor fuse. What else could be. The fan is working good but it does not blow cold air.

Thanks for any help.
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Tuesday, April 30th, 2019 AT 1:14 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the air blend door/actuator could be stuck in the heat position and also check AC relay
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Tuesday, April 30th, 2019 AT 1:14 PM (Merged)
Tiny
JANETWO
  • MEMBER
  • 1 POST
  • 1995 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • MANUAL
  • 170,400 MILES
I infrequently use air conditioning, but last time I tried it was like the Santa Ana winds blowing on me. There is no cold. Is the unit still working, just out of fluid (or whatever makes it run)? Is the old illegal freon and do I have to convert it (have it converted) to the newer, more evironmentally friendly stuff? How much will that cost?
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Tuesday, April 30th, 2019 AT 1:14 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You need to convert over to the R134a system -R12 freon is no longer available -the cost varies with location

AC blowing warm air only and no cool air? Your A/C cooling problem could be caused by any of the following:

Your A/C system may have lost its charge of refrigerant, or the compressor may not be engaging when you turn on the A/C, or the blend air door inside the HVAC unit may be stuck in the HEAT position so no air goes through the A/C evaporator.

Start with the compressor. Does it engage when you turn on the A/C?

If so, the compressor is working and the A/C system probably contains enough refrigerant to make cold air, so the problem is inside the HVAC unit. Replace the motor that controls the blend air door (this is a difficult job and best left to a professional since it involves tearing apart the HVAC unit -- about an 8 to 10 hour job!).

If the compressor does not engage when you turn on the A/C, see if it will run by jumping the compressor clutch wire directly to the battery (use a fused jumper wire). If the compressor works when you jump it, and the A/C blows cold air, the system contains refrigerant and the fault is likely a bad A/C compressor clutch relay or a bad clutch cycling switch or pressure switch.

If the compressor does not engage when you jump it, the problem is a bad compressor clutch.

If the clutch engages but the compressor does not turn (the belt will start to slip and squeal), the compressor is loced up and you need a new compressor.

If the compressor clutch engages and turns the compressor, but the A/C still does not blow cold air, the system is probably low on refrigerant and needs to be recharged. If you Have an A/C gauge set, hook it up and see if the system has any pressure.

If it is out of refrigerant or is low, check for leaks, then have the A/C system vacuum purged to remove air. After the air is out, it can be recharged with the specified amount of refrigerant. It is important to get any air out as this will reduce cooling efficiency and may make the compressor noisy.
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Tuesday, April 30th, 2019 AT 1:14 PM (Merged)
Tiny
CAMP61993
  • MEMBER
  • 1 POST
  • 1995 TOYOTA COROLLA
  • 297,000 MILES
I just bought this car and it ran fine for 3 weeks. Now the windows quit working 1st then, ac doesn't work, fan blower quit, the speed odometer and gauges on the dash quit. Also now the wipers have slowed way down. The transmission now has gotten where it isn't shifting right. I know it is electrical just need some help on where to start locating the problem.
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
You have to realize these things have nothing to do with each other. Is the battery maintaining a full charge? Have you checked to see if there are any bad body grounds? Did you check fuses for the electrical items? Did you check the vehicle speed sensor (VSS) for the speedo issue?
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
WAQAS27
  • MEMBER
  • 11 POSTS
  • 1986 TOYOTA COROLLA
  • 170,000 MILES
I think there was some connection of A/C with the old distributor's coil -ve terminal. And as I have now not connected anything with new distributors -ve terminal, maybe that's why the A/C is not working. I need you to elaborate it. And how to connect the A/C wire to new HEI Magneto distributor?
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
This should not effect the operation of the compressor according to the wire diagram.

What is the make of the magneto?

Roy
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The ignition system has nothing in common with the AC
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
WAQAS27
  • MEMBER
  • 11 POSTS
I have the wiring diagram of A/C of my car, here the A/C amplifier pin # 5 is connected with Ignition Coil's -ve terminal, I am here uploading the snapshot. Maybe that's why now the A/C is not working? As the new HEI Magneto Distributor is now connected with A/C amplifier pin #5. Kindly elaborate.
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the AC fuse -Black wire at AC Amp where does it goes to the old distributor also see below
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
WAQAS27
  • MEMBER
  • 11 POSTS
Should I connect the previous coil's -ve terminal to the new HEI Magneto distributor black wire, coz it has only two wires on it, one is of +12V DC, and other is a black wire (maybe also used for tachometer but my car does not have RPM gauge), so maybe this black wire on new magneto HEI distributor is for A/C amplifier pin # 5?
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
WAQAS27
  • MEMBER
  • 11 POSTS
This black wire you are pointing is going to igniter, and in my car the igniter was mounted on the coil.
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Is the AC fuse okay?
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
PEPLAR
  • MEMBER
  • 3 POSTS
  • 1996 TOYOTA COROLLA
  • 130,000 MILES
Since I replaced my alternator my aircon have stopped working, it does not receive any power when I switch it on. I want to know how many wires run into the aircon unit and from where and what works with it! I have checked all the fuses and there are no hanging or loose wires anywhere?
Thank you.
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So the ac fuse was good?Also have you checked to see if there is any charge in the system with a pressure gauge?
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
WAQAS27
  • MEMBER
  • 11 POSTS
I have not checked the A/C fuse, its in the fuse box in engine compartment?
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Tuesday, April 30th, 2019 AT 1:15 PM (Merged)
Tiny
PEPLAR
  • MEMBER
  • 3 POSTS
Hi, no I have not, how do I do this since the unit doesn't turn on at all, not the unit in the engin compartment nor the display light by the controls. Other wise the normal van and heater works 100%.
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Tuesday, April 30th, 2019 AT 1:16 PM (Merged)

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