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Air conditioning clutch engaging on and off frequently

When heater in defrost position clutch engaging on and off frequently causing low idle

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Posted on Jan 02, 2017

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SOURCE: 2003 honda accord air conditioning

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

Posted on Sep 25, 2008

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SOURCE: heater system not putting out hot air

with the engine idling you water temp might not get hot enough to open your thermostat that lets hot water go through your heater core. I would first have the easiest thing changed. the thermostat could be you main problem.I hope this helps you.

Posted on Nov 26, 2008

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SOURCE: Low engine idle speed when the air conditioning is running

the ac idle assist may be defective, if it's electric check the fuses if it's vachum operated check for vac. leaks. Also lube cables sometimes they stick Use wd-40 on the cables sparingly don't want dirt to stick to the cable.

Posted on May 30, 2009

  • 1 Answer

SOURCE: air conditioning clutch

I have the same problem with my Durango AC. I called the dealer and they do have clutch for my compressor available. I wonder how big of a job it can be. I got my A/C Charged thinking I am low on compressor gas only to find out after 135 dollars that it is my clutch that is not engaging. Cost of new compressor and labor factor added to it get to be a scary sum of money for 1998 model. Any one knows how to replace this clutch? Is it the front bold that is holding the entire clutch? Help amin

Posted on Jun 16, 2009

  • 226 Answers

SOURCE: Air stopped blowing through vents, only blows through defroster

Make sure all your vacuum hoses are connected on the engine side. There is a vacuum ball mounted close to or on the fender wall. Make sure that the hose is connected to the vacuum ball. Question: Has the engine started to run rough lately? And do you hear a hissing sound or whistle from the dash area?

Posted on Aug 17, 2009

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1 Answer

2005 linclon towncar - why will the ac clutch not engage


check the pressures in the system, if they are low it will not engage, it could be a bad connection for the compressor, check the compressor clutch air gap and clutch condition as this can cause a problem.

Aug 27, 2014 | 2005 Lincoln Town Car

1 Answer

Engine quits when ac turned on compressor unplugged


Knowing make model and year would help. Most newer vehicles, 2000 and newer, will adjust the idle control up to compensate for the compressor engaging. Possible there is an issue in the idle air control valve or electrical circuit.

Mar 14, 2017 | 2003 Ford Focus

1 Answer

I havepower to clutch relay ramps up eng.but compressor doesnt engage tryed taping on clutch but no engagements. 2009 nissan sentra exe


-Are you talking about air conditioning compressor?
-If so. Here there are few thing cause not to engage.
1. Freon is too low. (Or none at all)
2. Compressor itself is bad.


Mai Lor

Oct 10, 2013 | Cars & Trucks

1 Answer

I have a 94 thunderbird that overheats when idling with heater/defroster on. Water pump and thermostat have both been replaced in last six months. Any thoughts on what might be causing the problem?


Its very unusual for an overheating problem to be affected by the heater being used.
Have you tried running the engine with the HVAC control off to see if it still happens ?
The heater pulls coolant thru a mini-radiator which would actually help cool the engine. The defrost mode just adds the compressor to dry the air blowing on the windshield.
If the engine overheats at idle or low speeds the most common cause is low air flow thru the radiator.

Feb 08, 2013 | 1994 Ford Thunderbird

1 Answer

Mazda tribute,when the defrost in on my idle go to high


air conditioner has a clutch when the clutch is engaged there will be more of a load put on the motor causing the idle to compensate for the load

Apr 30, 2012 | 2003 Mazda Tribute

1 Answer

How do i keep the air conditioner from coming on


Well, you have PART of the facts. The whole truth is that the air conditioning does NOT come on if you have the heat turned on and you are using any mode OTHER than DEFROST or A/C. You may not realize it, but you WANT the air to come on when you are using the defrost mode. The reason for this is because the cold coils of the A/C evaporator causes moisture in the air to condense and the moisture then is able to collect and run out the drain tube at the bottom of the A/C housing which empties outside the car. So the air goes through the A/C coils first to be dried, then through the heater core to be heated.

Without this feature in wet weather conditions, the heater would simply heat the moisture and blow it onto your windshield and into the rest of the vehicle. This will cause your windshield to fog up WORSE than if you did not use the defrosters. This will also cause your side and rear windows to fog up as well. You have probably noticed the side windows fogging also when you are using the floor heat. Have you noticed that when you put the mode selector in the defrost position to clear the windshield, that the side and rear windows will also clear? This is because the A/C is DRYING the air inside the car.

Another part that you are probably not aware of is that if the outside air temperature is below 35 Deg. F the air conditioner compressor will not run at all - no matter WHAT mode you have it in. It won't even run in the A/C mode. This is for two reasons:
1. It protects your A/C system from operating at too low of a temperature which can cause freezing of the A/C components and damage to the system.
2. If the outside air is already cool, there will not be much moisure in it to begin with and whatever moisture there is will still condense on the A/C evaporator coils as it passes through it simply because it is cold.

You may be experiencing the A/C clutch cycling on and off in the cooler weather with the defrost on. This is NORMAL. However, if it is causing the engine to surge dramatically when it cycles, then the problem is NOT that the A/C is causing undue stress on the engine, but rather that the Idle Air Control valve (IAC) is not reacting to this change like it should. The IAC is supposed to raise the engine RPM a slight amount just as the compressor engages to lessen the affects of the extra load that is placed on the engine. Some "surging feeling" cannot be avoided, however, if it is severe, then it needs to be checked out.

Nov 17, 2011 | 2000 Ford Taurus

2 Answers

When I turn on the defrost or the air conditioner, my 2001 blazer seems to lose a lot of power- it feels almost like it's about to stall completely. And also, my air conditioner doesn't blow cold air. The...


A Faulty Idle Control Solinoid Will Cause this, Its Purpose is to Raise the Idle when the A/C -Defrost is turned on due to the Extra Load the A/C Compressor puts on the Engine.

Jun 14, 2010 | 2001 Chevrolet Blazer

1 Answer

Knocking when engine gets hot and car stopped


The fan clutch can make a knocking noise when it tries to engage. At idle it will have a rhythm to it when it tries to engage. You will have an over heating condition and the air conditioning may not work properly.

The fix is to replace the fan clutch and reprogram the engine control module.

Mar 14, 2010 | 2003 Chevrolet TrailBlazer

3 Answers

2000 ford taurs a/c dont work it blows cold when i power up the compressor.its running 45 lbs on my gage on the low side.


Hi...
Perform the following basic Checks and Information
1. Check Drive Belts,If belt is intact proceed to the next step.
2. Check for Compressor Clutch Engagement - Turn the air conditioner to the "on" position and set controls to the coldest setting. Start the engine and allow to idle. Then open the hood and inspect the clutch at the front of the compressor, is it turning? "Engaged" if so, the system has enough refrigerant to activate. If the system is low on refrigerant it will not work properly. In this case an air conditioner recharge kit is needed to recharge the system. If the compressor clutch is not turning proceed to next step.
3. Inspect for Refrigerant Leaks
4. Check under dash panel and under hood power distribution center
5. Check Temperature Control Vents - The vents inside your car are controlled by a cable, electrical servo or vacuum servo. If the vent door is not functioning properly it will cause warm air from the heater to exit the vents. To check this start the car and allow the engine idle, next turn the blower motor speed on low, switch the temperature control from warm to cold while your ear is close to the vents. You should hear the door move inside the heater box as it swings from open to close. If not, inspect for a vacuum leak or a shorted motor in the servo, repair the leak or replace the servo motor.
Thanks
Smith

Jul 31, 2009 | 2000 Ford Taurus

2 Answers

Air conditioning clutch will not stay engaged


sounds like its a little low on coolant.

Jun 18, 2009 | 2003 Ford Mustang

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