In this case, you will need to have the compressor repaired or changed. Remove the mechanical fan shroud i believe they are 8mm screws that hold the shroud in and remove the serp belt. Here is what I've done, engine running, Max AC, clutch will not engage compressor: Jumpered low pressure line switch. You will damage the. Don't know offhand whether there's a sight glass; if not, a shop will have to use its magic to check the refrigerant level. Truck: 1998 ford f150 flairside 4. 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. Jumped the low side pressure switch. Dirty or clogged condenser. A/c has full freon but the compressor clutch wont engage. Try this to test: Turn on the A/C and run it until the clutch won't re-engage. Start with making sure you have AC on voltage in to it on the blue/black wire (pin #22) as well as the white wire (pin #21). The R -134 permeates through the rubber parts of the system. Turn off the engine. 20 psi. If I jumper pin 3 to pin 5 on the relay the compressor clutch will engage and blow ice cold air and 134a level reads good. The ac is not functioning --- compressor clutch can be freely turned by hand with engine. Ac compressor not working- Issue Resolved writeup inside. If it does then you will know for sure it is the clearance. There are 14 v. Anonymous. 345,000 MILES. The clutch is not getting a signal to turn on. diyfixer answered 10 years ago. The compressor will engage jamping directly to battery. 1999 F150 lariat, a/c system cools well and then suddenly cuts off when accelerating or putting any strain on the engine. there is a pressure switch you can jump to make it come on. Finally cleared codes to see if one or the other would set with the A/C switched on, and no codes set, clutch still doesn't engage. Automatic. 2. If I jumper pin 3 to pin 5 on the relay the compressor clutch will engage and blow ice cold air and 134a level reads good. AC Diagnostic did not return any codes. The oil in your AC system circulates with the refrigerant. Above 25 PSI switch goes closed and provides a path to ground. amckane January 9, 2008, 2:05am #1. At . Asked by DragonBPV2 · 8 ANSWERS. After inspecting the belt, there can only be two things left that could be happening: 1. It was not. If you get stumped tracking down a leak, and. This indicates some form of wiring problem. If the switch is bad, the jumper should allow the compressor to start. 2. Ford Senior Master Technic. 2. Check the fittings at the condenser next. 1. (1999 - 2006) E36 (1991 - 1999) E60 / E61 (2004 - 2010) Top Contributors this Month View All shawnsheridan 418 Replies. Inspect low coolant content or pressure. There is a low pressure cutoff switch on the top of the accumulator. if the switch is bad the compressor will keep running and ice up. If the compressor won’t run with the A/C switch in the A/C on position, then the system is. With Engine and A/C on take something and safely tap the compressor this should make the clutch engage. Car Questions. #1 · Jul 27, 2009. 9. There's a wiring fault up stream from the low pressure switch. Ask your friend to start the engine while you look and listen to the engine. AC clutch not getting power. It does engage if I jump it off a 12V source. clutch. sounds like a crossed wire, especially if it's ignoring your speed selection and running when the key is out. The low side port is #5 in the picture. Can't find any fuse or breaker labelled AC. The AC compressor is getting a command to turn on but is no longer able to, which would indicate that it needs replacing. The ac is not functioning --- compressor clutch can be freely turned by hand with engine not running but does not engage when controls are set to use the ac wi. . read moreAn aircon compressor WON'T engage if the pressure isn't Juuuust right. Try carefully tapping the clutch on the compressor when it should be engaged. checked wiring everything seems fine. There are 14 v in the high pressure switch and low pressure switch when AC on. unplug the electrical connector at the a/c compressor clutch. Tried using a jumper to engage the clutch and this did not work. 2. I have a 1999 ford escort and the compressor wont engage by the control I ran a jumper wire to the compressor and it worked fine blowing cold air and all, but what would stop it from working by the control. The switch on the dash lights up. No clutch coil wire present. AC worked fine all summer. It has three relays, one for a/c compressor. ). Any thing I'm missing or do I need to start looking for a broken wire somewhere?No AC. AC Compressor Replacement Video. Ford escort: low pressure switch. The clutch is not getting a signal to turn on. A. unplug the switch and install a jumper wire between the orange and dark green wire, if the compressor comes on and the pressure is ok replace the switch. Ac clutch relay | GBodyForum - 1978-1988 GM A/G-Body. 6Leng. The clutch is not getting a signal to turn on. Noticed my AC wasn't blowing cold (this was the first time I had it on this season), so I pulled over and saw that the clutch is not engaging. #airconditioning #automotiveac #compressorwon'tturnon #compressorwontengage #accompressorNo A/C? Compressor clutch not coming on? A compressor clutch that wo. AC blowing hot air, compressor won't engage, Has full AC charge 100 psi on both sides at ambient,. 0 A/C compressor won't cycle. Just blows the ambient temperature. compressor wont engage. 4 Elocker <--My son's but I still. When you turn the knob to AC theres usually a click and then the pull on the motor as the compressor kicks in. Listen for an audible click from the A/C Compressor Clutch. Restarted engine and car began blowing cold air. Procharged 2000 5 Speed BAB GT, built motor, blower cams, 10 lbs, lee blankenship tune 430/405. . 8V when AC is activated and 0V when AC button is not activated. 3. Electrical problems, dirty filters or a broken thermostat can also prevent an AC compressor from functioning. MikeLC said: On Max A/C settings the Compressor clutch doesn't even try to engage. 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. Open the hood on your S10. Ac chevy low 1999 pressure gmc air compressor truck 1500 high conditioning side yukon 2005 conditioner 2000 2003 kick systemBose yukon 2001 amplifier cts deh rpo uqa stereo interface Yukon diagram wiring gmc 2002 turn99 tahoe a/c compressor wont engage. The WK is especially finikky with pressures, as I've found out recently. You can reset it. I know that isn't my problem for 2 reasons: 1 my system is still fully charged. Add to Cart. Disconnect the clear connector from the Vehicle Control Module (VCM). Method 2: Jump-start the clutch. Able to fill. SOURCE: Temperature Control not working on 1999 Ford Explorer. Two weeks ago I noticed the AC seemed a little weak. Go back and recheck the circuit. If your Air Conditioning compressor isn't working (the clutch won't engage) then watch this video. Yes, you can add some refrigerant while the compressor is not engaged. michaelbrainardatwor. CLUTCH NOT ENGAGING - I checked the fuse, it was good but I changed it anyway, the pulley turns but the clutch is not engaging, I checked voltage at the connector located on the compressor I read 14. Problem: AC Stopped working. See more. a/c compressor will not engage. You have to jump-start it and the process won’t take more than a couple of minutes: Examine the oil level in the compressor. if your a/c has no freon it will not engauge go to walmart get a do it yourself kit and put freon in it but when you do make sure a/c is running on high and as you ad freon the compressor should start cycleing. Nope. Switch the ignition off. I can bypass the relay and get the compressor to engage and I know I charged it with enough Freon (Low pressure = 35 psi, High pressure = 190 psi) outside temp is about 85* F. Was this. It. good old ford lol, try looking at the crank sensor its located at the front of the engine tucked in right hand side of exhaust manifold and gearbox, two pin plug, i have also known these to. pressures went 60 and 250. 5 - 1997 7. I get a reading of around 8. #3, jumpered the low pressure switch with a paper clip, nothing. A/C cycle switch is located in front right side of the engine, it must close when pressure in the system. 1. Its possible to jump this switch but I'm not sure of the correct procedure. The car only has 22k miles, and I always run the A/C compressor, either with the DEF or A/C. This bypasses the pressure switch. Maybe the engagement system was weak from age…. If not, it needs to be replaced (and of course the system needs to be recharged again). #15 · Jul 31, 2013. Listen for an audible click from the A/C Compressor Clutch. 17,628 satisfied customers. May 31, 2011. Check your AC clutch. AC worked fine before now compressor clutch won't engage. If the static pressure is above 45 psi, there's likely an electrical issue. engine running. what. 77,000 MILES. Faulty high or low switches. San Juan PR. If only the pulley is turning. 5 v @ hp switch no. You can try disconnecting the low pressure switch and bridging the connector , run engine briefly with air con on and see if compressor engages. Location. read more. ASE Certified Technician. 2. Close. Transmission. I listed out all possible reasons why your Compressor Clutch will not engage so be sure to watch this video till the end so you don't miss out any factors I. After inspecting the belt, there can only be two things left that could be happening: 1. The A/C CMPRSR CLTCH relay is also in the underhood fuse block. The only way to diagnose compressor clutch air gap is with a feeler. The codes were reset. If it does not run, something is wrong with the wiring or the compressor. SOURCE: location of low pressure port of a/c system on a Here is a system overview. 1999 to 2016 Super Duty; Large Truck; Excursion - King of SUVs;. Then the clutch on the A/C compressor disengages, causing the air to lose its cool. I have code B1B71 (Circuit short to battery or Open) for my Evap temperature sensor. Compressor cycled and air got warm when driving. The low side should cut out at aprox. Of course what does happen with the switch disconnected is that the cooling fan runs at high speed whether the AC is on or not. (low pressure cut out switch). well,that click you have been hearing would be the a/c clutch kicking on. Ac compressors are protected by high pressure and low pressure switches in the system. Also you may need to swap the CCRM box underneathe the air filter plastic housing. 2003 Chevrolet Tahoe 5. Disconnect the 14-pin connector. Prior to this, the ac was not working at all. Cobra Item Part Number Description 1 19972 A/C Compressor to Condenser Discharge Line 2 19E762 A/C Charge Port Valve(High Side) 3 19D594 A/C Pressure Cut-Off Switch 4 19D742 Evaporator to. As things heat up, the gap increases, and the clutch cannot pull in the plate. I just replaced mine it was leaking out the seal on the front of the compressor it would hold Freon for about 4 weeks and stop. Low or High freon pressure (too high or too low of a pressure reading will trip an internal switch not allowing the compressor to engage, thus saving the compressor from damage) 3. 1995 Ford Escort; Ford Escort Car and Truck; Ford Car and Truck. Turn the Ignition Switch to the Run position. From the front of the car with the hood open, the switxh is in the back left corner of the engine compartment. Allentown, PA. A/c compressor wont engage. 4. 3 seconds after A/C is turned "ON. MY COMPRESSOR WON'T TURN ON WHEN I TURN ON THE SWITCH. . Instructional repair video. The compressor would then turn off when the drop in temperature was not detected by the sensor. Check for ground on the black wire. at the coil terminal connector. AC clutch wont engage. In that case the compressor would engage for about 20 sec when the engine was turned on. It can take a long time for a can to be drawn into an empty system , maybe 15 minutes or so. Relay is not the problem. 2. AC worked fine before now compressor clutch won't engage. I tried a different relay and had. as soon as we recharged it, it turned right on. #4 un-plugged the connector wire (single black wire) going to the. Step 3: Check the Condenser Fan. Keep in mind that the Clutch won't engage for a few safety reasons. Steps. Seems the relay is not being grounded by the ECM to control the AC clutch and fan relay. In this case, you will need to have the compressor repaired or changed.