Question about 1990 Honda Civic

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AC Compressor clutch won't engage, AC button is on, fan is in the 4 position, the temp control is all the way in the cold position, and the vent slider is on recurrculation. I';m trying to refill it with freon (R134a), but, not even teh condensor fan is turning on. All fuses that I can find check good. Thanks Jerry

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Hi BE SHURE TO CHECK THE FREON GAS YOU ARE FILING IS COMPATIBLE WITH THE R12 IN THE SISTEM.THE R12 IS THE ORIGINAL FREON GAS THAT MODEL CAME WITH.IF THE AC SISTEM IS EMPTY THE AC COMPRESOR WILL NOT OPERATE UNTIL IT HAVES SOME GAS PRESURE SO WHEN YOU FILL THE SISTEM WITH THE FIRST BOTLE OF FREON IT WILL AUTOMATICALY START TO OPERATE ON AND OFF UNTILL THE SISTEM IS FULLY CHARGE

Posted on Oct 03, 2009

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I have a 98 bonneville se. the blower fan only comes on when the knob is all the way up and it ONLY blows heat and absolutely no cold also the air only blows out the defroster and the floor


How did you test the A/C system ? Hook up gauge manifold , test A/C pressures ? Manual or automatic climate control ? The blower motor only working on high means the blower motor resistor is bad ! Did you hook up a scan tool an check high an low pressure switchs inputs to the PCM - engine computer . Does the A/C compressor clutch engage ? turning on the compressor ? Moving the mode switch does nothing . Doesn't move from floor to vent to defrost ? Probably the mode door actuator ! Don't think the HVAC control panel is bad . Just a few little things . Pushing the A/C button on the control panel just send a electrical signal to the PCM , the PCM will energize the A/C clutch relay , turning on the compressor .

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May 19, 2017 | 1998 Pontiac Bonneville

1 Answer

The A/C will not turn off on my 2006 Kia Sedona EX. Air blows cold, but no matter where you set the control knobs for A/C system or fan controls the A/C stays on. Even with knob in the OFF position.


Looking under the hood in engine compartment with engine running A/C off , the compressor is engaged ? If so , the A/C compressor clutch relay is stuck closed energizing the compressor clutch all the time . Now if your talking about the blower inside the car running all the time , air blowing out of the vents . The A/C isn't engaged . Could be blower motor relay stuck or the control module is bad .

Jun 21, 2016 | 2006 Kia Sedona

1 Answer

2001 Honda Passport/Isuzu Rodeo a/c not getting cold, fan in grill not turning, there is plenty of freon and inside controls/fan working fine. Is there a fuse for the other fan?


Yes there is a fuse for the other fan, generally inside the engine bay as apposed to inside the vehicle. I would think it is more likely to be the clutch on your compressor unit that is not engaging when you press the AC button. In this case the fuse on the AC button is responsible and this is also found inside the engine bay. Check either of these fuses and you should get the AC working. If not then there may be insufficient pressure in your AC system or your compressor unit needs changing out.

Mar 13, 2013 | 2001 Isuzu Rodeo

1 Answer

Ac vent blower


proceed according and fix it. God bless you
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 locked 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

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Oct 05, 2012 | 2001 Oldsmobile Aurora

2 Answers

Ac won't get cold anymore power to compressor but won't click on clutch won't engage possible problems are compressor or evaporator what do you think?


Has the Freon been checked with a gauge to see if there is enough Freon to allow the system to work. Low or no Freon will not allow the compressor to engage. The low pressure switch is most likely activated due to low freon, and will cause this condition.

Aug 19, 2011 | 2001 Jeep Grand Cherokee

1 Answer

Ac won't turn on?


Your compressor clutch is not engaged that was why AC is not on. The clutch is controlled by several sensors: coolant temp, refrigerant pressure, compressor speed sensor, evaporator temp sensor... First to make sure your Clutch is working then start tracing back to these other sensors. Look at the compressor, there is a plug of electrical wire on it. One prong is for speed sensor feedback, the others are for power connectors to turn on the clutch. Jump wires to power to clutch to check if it is working. That is just the beginning of AC troubleshooting. Good luck.

Aug 12, 2009 | 2001 Mercedes-Benz S-Class

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

1 Answer

When starting the car the AC Compressor wont come on right away


HI. Here is a complete check list that will help you trouble shot thsi issue. You will find the problem in one or more of these areas stated below.

1. Check Drive Belts - The air conditioner utilizes a drive belt that supplies power to rotate the compressor, which is basically a refrigerant pump. If the belt fails the compressor has nothing to drive it, inspect and replace as needed to restore operation. 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 system is low on refrigerant it could cycle on and off, making a ticking noise. If the compressor clutch is not turning proceed to next step.

3. Inspect for Refrigerant Leaks - If the system has a large leak and no refrigerant remains it will not activate. First test system for a static pressure charge, with the engine off attach an ac gauge to the low side pressure port and check the state of charge. Depending on outside temperature there should be between 50 psi and 80 psi. (Cool and warm). A refrigerant leak detector is needed to inspect for leak, but if you do not have a leak detector there is an alternative method. The air conditioner system is designed to run with oil suspended in the refrigerant to lubricate the system. Check for oily residue outside the system by inspecting all hoses, compressor, condenser, evaporator or receiver drier and replace any component that has failed.

4. Inspect Fuses - Check under dash panel and under hood power distribution center. Replace failed fuses as needed, recheck system. If the new fuse fails when reinstalled a short circuit is present and requires diagnosing with a wiring schematic, follow circuits to locate short, repair as needed and recheck system.

5. Check Temperature Control Vents - The vents inside your car are controlled by a cable, electrical servo or vacuum servo. If the temperature blend 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, insect for a vacuum leak or a shorted motor in the servo, repair the leak or replace the servo motor.

Nov 18, 2008 | 2001 Volkswagen Jetta TDI

1 Answer

Ac not working


if you by passed the relay and clutch engaged then this shows that pump works ??but was it getting cold on and around the restrictor valve where the pipes enter the cab is normally a valve block but american monsters use a valve in the pipe for cooling and if its not getting cold their or blowing cold inside cab then system needs re-gassing with R 134 gas if its an older system with R 12 gas then it will need to have adaptors fitted to valve connections and refilled with R134 gas.The main cause of A/C system loosing gas is porosity in the rubber flexible pipes also the back seal on the pump.Or just regass and put a leak stopper in the system

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1 Answer

Climate control


when the ac blows warm you need to stop and see if the compressor clutch is working (pass side front lower of engine),set the temp to max cold turn the vents to blow out the center area turn the fan speed on 3 or 4 and tell use what it does

Aug 18, 2008 | 2000 Volvo S80

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