The next section tells you how to manually engage AC compressor clutch at home. Install the bearing into the clutch rotor (if applicable) by placing the rotor on a support. No matter how high you set that regulator, it does not seem to work. From the leaking refrigerant to the bad compressor, even a tiny fault in the HVAC system can make you face difficulty with your AC. Inadequate lubrication can damage the compressor. If the AC compressor clutch engages when you tap it, try disassembling the compressor clutch and removing all fitted washers, which can extend its life by several thousand miles. You can hear this when inside the vehicle. System has freon in it. If you cant figure out how to test the relay from looking at the underhood fuse box then you will need to obtain a wiring diagram to understand the circuit then perfrom the diagnosis. Car Air Conditioner Won't Take Freon Written by H.R. It will supply the battery voltage to the compressor clutch, allowing it to engage manually. You Need a set of AC pressure gauges to do this testing. I would say it is spinning at 15 rpm's. Note that electric compressors are increasingly used, and not only on hybrid cars. Turning whenever the engine is cranked, the A/C Compressor Clutch Pulley will spin even if the AC Compressor is off. It is common when facing issues such as fan clutch stuck engaged or fan clutch hard to spin. Do I have to replace my compressor? Using a 12-volt test light, connect the alligator clip to the negative terminal on the battery. Before removing a serpentine V-ribbed belt, make sure there is a belt routing diagram handy or draw one prior to belt removal, to prevent installation problems. When I check the pressure if and the compressor is spinning is shows as low on freon but when it stops spinning it shows as overfilled. Remove the Woodruff key from the hub and place it aside for future use. As I pulled up to the pump before cutting the engine, I heard a screeching noise and the truck chassis shuddered. Since the Shaft of the AC Compressor is mated with the A/C Hub, once engaged, it begins to pump refrigerant in the system. Bad for the car to start with compressor on? Any ideas? What is the most common reason for an air conditioning compressor not to engage? AC compressor clutches receive power in a number of ways. The AC has never worked for as long as she's owned the car. That is why the clutch assembly is necessary. High pressure means that there is a load being placed on the engine by the power steering pump. Martin, When current flows through the coil windings, a magnetic field pulls the drive hub snug against the pulley. To prevent this from happening, many systems are equipped with high-pressure cutout switches. Easy. Show Less. -- Go to Insufficient Cooling Go to Step 23 13 Turn the ignition switch to the OFF position. This switch is installed in the power steering system and reports on high pressure conditions. A loose mounting can cause knocking noises from the compressor area that may be mistaken for internal compressor noise. I'm new here, please be nice reference: whrl.pl/Re3doW. As soon as I do, fuse pops. The system’s computer keeps the relay grounded but it can go on and off due to the bad switch. Disconnect the power wire to the clutch and apply 12 volts to the clutch field winding terminal. However, if the bearing is replaceable, drive the bearing out of the rotor hub with a rotor bearing removal tool. most likely the ac compresoor is dragging if the belt is slipping. The Easy Way to Use a Recharge Kit for Car AC. Observed that clutch does not engage. Also, find out whether the clutch and the pulley are spinning. If the AC Compressor is powered up, electricity engages the coil, and when this happens, it also engages the pulley. Most modern compressors have a clutch and drive pulley. Always check the compressor mounting and brackets before condemning the compressor for noise. Always use manufacturer’s tension recommendations. Wait for the AC clutch in front of the compressor body to engage and spin. Once the assembly is properly seated, install the retainer ring. If the trimmer engine runs, but the trimmer head does not spin when the throttle is engaged, the clutch may be broken. The low-pressure switch tells the car that the clutch needs to engage and disengage and will shut off the A/C compressor. The computer can turn it on when needed, then off when it has done its job. Changing the compressor clutch could be the only solution in this case. The clutch on my ac compressor doesn't engage, I can spin it freely by hand, checked both fuses and changed ac clutch - Answered by a verified Saturn Mechanic. how do i test it? It was working find but now nothin7. If the clutch is engaged and the compressor is not turning, the compressor is probably toast. Same fix. After about a year, the tapping wouldn't fix the problem. Why You Should Rather Rely On An Expert For Truck Repair. If I run the compressor right to the battery it will stay on until I unplug it. If you want to diagnose an AC compressor clutch for defects, apply these techniques: Set all air conditioning controls to the MAX before kicking off the engine. could it be the ralay? Mechanic's Assistant: What is the model/year of your Nissan? Discussion Starter • #1 • Sep 9, 2013. The A/C worked fine before the truck was parked for about 5 months. Although many of the controls used in automotive air conditioning systems are simple electromechanical switches or other devices, electronic control is now being used, as with engine management and body control computers. No, the AC clutch will not engage when the Freon is empty or low. The pulley turns whenever the engine is running, although the compressor clutch is not engaged when the air conditioning is turned off. Helm on Aug 17, 2020. Is There Honda Civic Si Automatic? In a few cases, the clutch does not engage due to a clogged refrigerant circuit. Next step is this: "Check voltage at pin 'A' of compressor clutch" Moreover, because of being passionate to learn about the recent happenings in auto industry, he doesn’t only provide great car maintenance tips, he also always updates latest trends in among car brands and share them in his own interesting viewpoint. Active 1 ... then turn the key and starter will engage and all is good. Ceramiclover 0 Ceramiclover 0 Advanced Member; Members; 0 63 posts; Saint Paul, MN; Posted March 13, 2015 … I know the compressor is suppose to spin while the AC is on and it does for a few seconds but then it stops for a bit then starts again and so on. In this step, you have to detach the connector cable from clutch oil. Is this going to be the clutch? Once you refill the Freon, check for any leakages to prevent the problem from reoccurring. If the clutch plate and hub are fastened to the shaft using a retainer such as a C-clip, remove the clip using the appropriate removal tool. An electromagnetic clutch provides the mechanical link between the pulley and the compressor input shaft whenever air conditioning is demanded. Clutch pulley wobble also indicates worn shaft bearings. Everything You Need To Know! Low-pressure conditions can indicate failures such as a clogged orifice tube, low refrigerant charge, expansion valve stuck closed, or a restriction in the high side of the A/C system. Pull out the AC fuse and examine the filament inside the fuse. Introduced in to follow this frictional surfaces with manufacturer ’ s internal.. The compressor is removed, attach a clutch and the evaporator temperature sensor inside the fuse if you find information! Leave the AC compressor clutch is one of the compressor, hoses, cold... 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