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Posted on Nov 05, 2017

96 Honda Civic Air Conditioner will not come on automatic

I hot wired the compressor clutch and charged the system. it cools fine like that. Have checked every fuse and plug that i can find with the AC system. Low preasure switch, Relay under the hood, the green light in the car for the AC switch goes on and off green but will not turn the compressor on even when the system is fully charged.

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  • jmmckean Apr 06, 2009

    The Low pressure switch is just a low preasure by the evaporator dryer. I haven't found a high pressure switch but have checked the relays to the clutch and the condensor fan. Replaced one with new. The radiator cooling fan works just fine. I took an old relay apart and put it in the compressor slot and when you mannually close it it turns the compressor on but not the condensor fan at the same time or not at all that I can tell.When I hot wire the condensor fan to the compessor hot wire everything cools and functions properly while holding the relay closed.

  • Anonymous May 11, 2010

    so does the vents blow air at least ..?

  • Anonymous May 11, 2010

    Is your low pressure switch strictly low pressure or is it a combination low/high switch? If not a combination then there is a high pressure switch somewhere which may be stuck. Also check the condenser fan relay and radiator fan relay. The computer won't let the a/c run if it can't get the cooling fans to work.

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5 Related Answers

Anonymous

  • 57 Answers
  • Posted on May 20, 2009

SOURCE: A/C compressor/pulley clutch does not disengage.

It may be a bad low pressure cut out switch. You would have to hook the system to a set of gauges and look at the pressures. The low side should cut out at aprox.20 psi. if the switch is bad the compressor will keep running and ice up. The switch is easy to replace. It screws into the dryer (big silver can} it has two wires going to it. It's a cheep fix to try at home.

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Anonymous

  • 375 Answers
  • Posted on May 18, 2008

SOURCE: can a 96 Ford Windstar Air Conditioner Compressor Pump Fit in a 98 Windstar?

The compressor is the same but it may have a different pulley and the plug may be indexed on the wrong side. If you have a set of snap ring pliers you can put your coil and pulley on that compressor or it may already be the same ones just make sure you put the plug where it is on your original compressor.

Anonymous

  • 360 Answers
  • Posted on Sep 18, 2008

SOURCE: Compressor Magnetic Clutch - 1996 Honda Accord EX

looks like fuse # 8 "heater control relay- ac clutch relay-cooling fan" fuse runs the 12 volt side " black and yellow stripe wire " pcm or ecm runs the ground side "red -blue stripe wire"- what else do you need?

Anonymous

  • 31 Answers
  • Posted on Sep 25, 2008

SOURCE: 2003 honda accord air conditioning

replace the black relay between the 2 blue relays in the fuse box. cost about 5 bucks.

A

Anonymous

  • Posted on Apr 21, 2009

SOURCE: Air condition is not cooling my car is Honda Civic 2003

Realize that auto AC is basically a refrigerator in a weird layout. It's designed to move heat from one place (the inside of your car) to some other place (the outdoors). While a complete discussion of every specific model and component is well outside the scope of this article, this should give you a start on figuring out what the problem might be and either fixing it yourself or talking intelligently to someone you can pay to fix it.Become familiar with the major components to auto air conditioning:
the compressor, which compresses and circulates the refrigerant in the system the refrigerant, (on modern cars, usually a substance called R-134a older cars have r-12 freon which is becoming increasingly more expensive and hard to find, and also requires a license to handle) which carries the heat the condenser, which changes the phase of the refrigerant and expels heat removed from the car the expansion valve (or orifice tube in some vehicles), which is somewhat of a nozzle and functions to similtaneously drop the pressure of the refrigerant liquid, meter its flow, and atomize it
the evaporator, which transfers heat to the refrigerant from the air blown across it, cooling your car
the receiver/dryer, which functions as a filter for the refrigerant/oil, removing moisture and other contaminants Understand the air conditioning process: The compressor puts the refrigerant under pressure and sends it to the condensing coils. In your car, these coils are generally in front of the radiator. Compressing a gas makes it quite hot. In the condenser, this added heat and the heat the refrigerant picked up in the evaporator is expelled to the air flowing across it from outside the car. When the refrigerant is cooled to its saturation temperature, it will change phase from a gas back into a liquid (this gives off a bundle of heat known as the "latent heat of vaporization"). The liquid then passes through the expansion valve to the evaporator, the coils inside of your car, where it loses pressure that was added to it in the compressor. This causes some of the liquid to change to a low-pressure gas as it cools the remaining liquid. This two-phase mixture enters the evaporator, and the liquid portion of the refrigerant absorbs the heat from the air across the coil and evaporates. Your car's blower circulates air across the cold evaporator and into the interior. The refrigerant goes back through the cycle again and again. Check to see if all the R-134a leaks out (meaning there's nothing in the loop to carry away heat). Leaks are easy to spot but not easy to fix without pulling things apart. Most auto-supply stores carry a fluorescent dye that can be added to the system to check for leaks, and it will have instructions for use on the can. If there's a bad enough leak, the system will have no pressure in it at all. Find one of the valve-stem-looking things and CAREFULLY (eye protection recommended) poke a pen in there to try to valve off pressure, and if there IS none, that's the problem. Make sure the compressor is turning. Start the car, turn on the AC and look under the hood. The AC compressor is generally a pumplike thing off to one side with large rubber and steel hoses going to it. It will not have a filler cap on it, but will often have one or two things that look like the valve stems on a bike tire. The pulley on the front of the compressor exists as an outer pulley and an inner hub which turns when an electric clutch is engaged. If the AC is on and the blower is on, but the center of the pulley is not turning, then the compressor's clutch is not engaging. This could be a bad fuse, a wiring problem, a broken AC switch in your dash, or the system could be low on refrigerant (most systems have a low-pressure safety cutout that will disable the compressor if there isn't enough refrigerant in the system). Look for other things that can go wrong: bad switches, bad fuses, broken wires, broken fan belt (preventing the pump from turning), or seal failure inside the compressor. Feel for any cooling at all. If the system cools, but not much, it could just be low pressure, and you can top up the refrigerant. Most auto-supply stores will have a kit to refill a system, and it will come with instructions. Do not overfill! Adding more than the recommended amount of refrigerant will NOT improve performance but actually will decrease performance. In fact, the more expensive automated equipment found at nicer shops actually monitors cooling performance real-time as it adds refrigerant, and when the performance begins to decrease it removes refrigerant until the performance peaks again.

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Related Questions:

0helpful
1answer

Air conditioning blows hot and cold air

You will need to know if the compressor is working when it blows hot air to proceed. It could be an electrical problem, a blend door problem, or the a/c clutch on the compressor.
0helpful
1answer

I removed a a/c compressor for repair a magnetic clutch.after installation and recharged with about 700gm r134a gas, high preesure 250psi, low pressure 10psi at idle speed 800rpm, turn on a/c blower speed...

You removed the AC compressor? DId you block it in like A-6 compressors or just open the system? If you did not block it in, then you are required to flush the whole system replace the R/D or dessicant and check the OT or EV. Then you add the oil or seal and add oil charge and evac it and then charge it. This is not going to be cheap. You could have just R/R the clutch without taking the compressor off.
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Problem with heating and air conditioning. The driver's side is blowing hot air and the passenger side is blowing cold air

Air Conditioner blows warm air
  1. Air conditioner system is discharged. Have the system evacuated, charged and leak tested by an MVAC certified technician, utilizing approved recovery/recycling equipment. Repair as necessary.
  2. Air conditioner compressor clutch not engaging. Check compressor clutch wiring, electrical connections and compressor clutch, and repair or replace as necessary.
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My GMC Sierra's air conditioning works great but the driver side vents will spontaneousely start blasting out hot air. The passenger side continuse to blow cold air. If iI turn the truck off and...

  1. Air conditioner system is discharged. Have the system evacuated, charged and leak tested by an MVAC certified technician, utilizing approved recovery/recycling equipment. Repair as necessary.
  2. Air conditioner compressor clutch not engaging. Check compressor clutch wiring, electrical connections and compressor clutch, and repair or replace as necessary.
1helpful
2answers

Air conditioner blows hot air inadvertantly.

possibl ac compressor clutch problem,cooling fan at rad not working so ac goes into high press mode and turns off(so it doesn,t blow system apart,built in safety)not enough r134 in system(low charge)
1helpful
1answer

2000 Civic stolen, air controls taken, then clutch fell off

Coincidence... in my opinion.

1. In your long drive, you may have set the a/c on "Max" or "recirculate" ... and set the fan on low. This can cause "freezing" the core inside the vehicle; this will create a lot of pressure in the compressor and the clutch will slip.
The "freeze" will cause the air to feel warmer; because the refrigerant is not circulating correctly.

2. Also, if there was oil or some other lubricant on the clutch, the clutch would slip, heat-up and fall apart.

3. The "fixed" a/c controls may have left the "vent" (non-circulating) control disconnected so that the inside core is unable to receive any "outside" warm air to keep the core from freezing... (possible)

Hope this helps ... comments anyone??








1helpful
1answer

If i start the car and then start air conditioner the rpm is not automatic increase but decrease what i do?

the rpm will first drop because of the compressor clutch engaging. it should normally drop and then return to normal idle once the computer compensates for the compressor kicking on.
2helpful
1answer

2001 honda civic Air conditioner will not blow cold. I went to recharge it the other day and when i put the gauge on the low side the pressure was extremely high 80psi+. Why? Is this something i can fix??

Air conditioning systems are always high-pressure systems,simply because the refrigerant used is a gas forced to become liquid.

In fact, a loss in pressure in the cooling lines means that your system will have no cooling capacity.

Your problem description points towards your compressor not engaging. There could be a switch in your car's interior/dashboard that indicates 'COOL' or A/C (or something like it) that should manually engage/disengage your a/c compressor.

In case this still does not work, your compressor clutch or the electrical system engaging this is faulty and will need the attention of a qualified service technician.

Hope this helps.
0helpful
1answer

Car ac malfunctioning

/Does the compressor kick in compressor or the compressor clutch might be shot
0helpful
1answer

Air conditioner

You might be losing A/C R134. You can buy a test kit and new R134 at a parts and the tster will tell you how much R134 you have in your system and you can recharge it at the same time if you need it --Good Luck
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