ac just quit
Parked my 06 last night everything seemed fine now ac won't work today. Compressor clutch not engaging. Tried to put a can of freon in but without the compressor running no luck. Used to be able to bypass the low pressure switch on my old trucks but could not figure how to make it happen on this one????
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check fuses ?
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Checked the main fuse box under the hood can find no problems there. Of course none of the fuses are labeled as being for the ac so I checked them all.
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check fuses...prob not it though...its the clutch assembly, compressor is fine but you cant get parts to fix clutch. put in the new 440.00 compressor and it will work.
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surely there must be someway to test the compressor clutch assembly. On Chevy's you could put a jumper on the low pressure switch to make the clutch energize. Could not figure out how to make it happen on my Dodge. Is there possibly an in-line fuse to the compressor???
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you can try taking something and slapping the end of the clutch to try and get it to engage. if it does it will stay engaged till it cycles off then it wont re-engage. slapping it on the end will pull it up to the magnet. mine was so worn it wouldnt pull it up to the weak magnet.
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I will give that a try today. Did you change the dryer when you changed the compressor?
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You may have a leak in the system. When mine quit, I found that the serpentine belt had worn a hole in the line running from the front cooler to the compressor. The symptom was compressor clutch would not engage.
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mine did the same thing it was the coil in the clutch burned up could not figure out ho to jump it without suplying power to the coil . checked the power on the pigtail showed no power but it is controled by the computer and i guess it was kiling the power to the bad coil made me think it was something like a fuse or switch changed the clutch coil out and works fine but that burned up in 6 weeks so i got a compreser from dodge for like $330 and been working for 2 years
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just finished my sig wanted to see it in action, not to start brand war but dont buy a valair
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I guess I need to bite the bullet and change the compressor and see if that works. Also realized today that the clock on the radio is gaining time. I wonder if there is something electrical malfunctioning that could cause both problems. It a shsme but the local dealer shop isn't capable of fixing a flat much less something like this and the out of town dealership I used in Houston is now closed.
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have the dealer run a diag on it, mine turned out to be the tipm (module), it needed to be reset, They charged me $200.00 (I don't see how hey can sleep at night!) but thats cheaper than a compressor.
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on my 06 it did the same thing and a week later started working on and off. Come to find out it was the clutch that was bad. New ac compressor.
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I would not change the compressor until I had it checked... when ever you break the seal on AC parts, you better be sure.
I had the same problem on a chevy, and it was the low pressure switch. Check the electrical connections going to the compressor. Let me look in my dealer manual... |
1 Attachment(s)
Check this out...
A/C PRESSURE TRANSDUCER DESCRIPTION The A/C pressure transducer is a switch that is installed on a fitting located on the refrigerant discharge line between the compressor and the condenser in the front corner of the engine compartment. An internally threaded hex fitting on the transducer connects it to the externally threaded Schrader-type fitting on the discharge line. A rubber O-ring seals the connection between the transducer and the discharge line fitting. Three terminals within a molded plastic connector receptacle on the top of the transducer connect it to the vehicle electrical system through a wire lead and connector of the headlamp and dash wire harness. The A/C pressure transducer cannot be adjusted or repaired and, if faulty or damaged, it must be replaced. OPERATION The A/C pressure transducer monitors the pressures in the high side of the refrigerant system through its connection to a fitting on the discharge line. The transducer will change its internal resistance in response to the pressures it monitors. The Powertrain Control Module (PCM) or the Engine Control Module (ECM) depending on engine application, provides a five volt reference signal and a sensor ground to the transducer, then monitors the output voltage of the transducer on a sensor return circuit to determine refrigerant pressure. The PCM/ ECM is programmed to respond to this and other sensor inputs by controlling the operation of the air conditioning compressor clutch and the radiator cooling fan to help optimize air conditioning system performance and to protect the system components from damage. The A/C pressure transducer input to the PCM/ECM will also prevent the air conditioning compressor clutch from engaging when ambient temperatures are below about 10° C (50° F) due to the pressure/temperature relationship of the refrigerant. The Schrader-type valve in the discharge line fitting permits the A/C pressure transducer to be removed or installed without disturbing the refrigerant in the system. The A/C pressure transducer is diagnosed using a DRBIIIt scan tool. Refer to the appropriate diagnostic information. DIAGNOSIS AND TESTING - A/C PRESSURE TRANSDUCER The A/C pressure transducer is tested using a DRBIIIt scan tool. Refer to the appropriate diagnostic information. Before testing the A/C pressure transducer, be certain that the transducer wire harness connection is clean of corrosion and properly connected. For the air conditioning system to operate, an A/C pressure transducer voltage reading between 0.451 and 4.519 volts is required. Voltages outside this range indicate a low or high refrigerant system pressure condition to the Powertrain Control Module (PCM) or Engine Control Module (ECM) depending on engine application. The PCM/ECM is programmed to respond to a low or high refrigerant system pressure by suppressing operation of the compressor. Refer to the A/C Pressure Transducer Voltage chart for the possible conditions indicated by the transducer voltage reading. REMOVAL NOTE: Note: It is not necessary to discharge the refrigerant system to replace the A/C pressure transducer. (1) Disconnect and isolate the battery negative cable. (2) Disconnect the wire harness connector from the A/C pressure transducer. (3) Remove the A/C pressure transducer from the fitting on the discharge line (Fig. 15). (4) Remove the O-ring seal from the A/C pressure transducer fitting and discard. INSTALLATION NOTE: Replace the O-ring seal before installing the A/C pressure transducer. (1) Lubricate a new rubber O-ring seal with clean refrigerant oil and install it on the A/C pressure transducer fitting. Use only the specified O-rings as they are made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle. (2) Install and tighten the A/C pressure transducer onto the discharge line fitting. The transducer should be hand-tightened securely onto the discharge line fitting. (3) Connect the wire harness connector to the A/C pressure transducer. Look at #5, it shows the wire and the plug... hope this is it... Attachment 74769 Hope this helps a little. I can give you more if you need it... |
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