Clutch

1998 Dodge Ram AC clutch won't engage

1998 Dodge Ram AC clutch won't engage
  • 1516
  • Eric Burns

One of the most common problems is a low refrigerant charge, the low pressure switch prevents the AC clutch from engaging when the system is low on refrigerant. Definitely check the fuses before replacing anything else. ... Another fuse is under the hood on the drivers side titled "A/C Clutch".

  1. What would cause an AC clutch to not engage?
  2. What should I do if AC compressor clutch is not engaging?
  3. How do I manually engage my AC compressor?
  4. Can you spray WD40 on AC clutch?
  5. How do I know if my AC clutch relay is bad?
  6. Can I bypass AC low pressure switch?
  7. How do you jump a low pressure switch on AC 3 wire?
  8. Will AC clutch engage if low on Freon?
  9. Should AC clutch spin freely?
  10. How long should AC clutch stay engaged?

What would cause an AC clutch to not engage?

If the clutch doesn't engage, the problem could be a blown fuse, an open in the wire to the clutch coil, a bad clutch coil, a poor ground, or a low pressure lockout. ... In some vehicles the compressor clutch relay is turned on and off by the low pressure switch and the evaporator temperature sensor.

What should I do if AC compressor clutch is not engaging?

If the compressor clutch doesn't engage; that usually means there's an electrical or mechanical problem with the compressor. If the AC is not blowing cool air into the car, you may want to do a visual inspection of the AC compressor clutch, and determine if you can see what might be causing the clutch to not engage.

How do I manually engage my AC compressor?

How to Manually Engage an A/C Compressor

  1. Check the compressor oil level. Add more oil if necessary. ...
  2. Locate the single wire connector near the front of the compressor and unplug it.
  3. Hook one end of the fused jumper wire to the compressor side of the wire connector. Hook the other end of the jumper wire to the positive terminal of the battery.

Can you spray WD40 on AC clutch?

The AC clutch is an electromagnetic clutch. So spraying WD40 on it will not help at all. It may be an electrical problem (high or low pressure switch) that is preventing the clutch from engaging.

How do I know if my AC clutch relay is bad?

Signs of a Bad or Failing AC Compressor Relay

  1. Inconsistent cooling. The AC compressor is powered by the relay. ...
  2. AC compressor is not turning on. One of the most obvious signs that the AC relay may have a problem is that the compressor is not coming on at all. ...
  3. No cold air.

Can I bypass AC low pressure switch?

Under normal conditions the pressure switch doesn't cycle the compressor. ... In your case, if your system is working properly, you should be able to bypass the switch temporarily until you can replace it.

How do you jump a low pressure switch on AC 3 wire?

How To Jump 3 Wire Ac Pressure Switch In Simple Steps

  1. Reset PCM Fuse. You have to get rid of the PCM fuse to start the repairing procedure. ...
  2. Jump AC Relay. Connect the wires according to the numbers printed on it. ...
  3. Connect The Charging Connectors. It is essential to remove power before starting the process. ...
  4. Open Gas Valves.

Will AC clutch engage if low on Freon?

That's why car makers install a low pressure switch–to prevent the compressor from running if the system is low on refrigerant. ... But if the system is too low on refrigerant, the clutch will never engage. Some DIYers then hotwire the low pressure switch to force the compressor clutch to engage while they recharge.

Should AC clutch spin freely?

Most AC clutches are designed to spin freely when disengaged, and also with the pulley and compressor when those are engaged. If the clutch spins freely at all times, and the compressor never comes on, then it may not be engaging and therefore needs to be replaced.

How long should AC clutch stay engaged?

At idle, it will stay on for about 3 seconds, then disengage for about 3 seconds and repeat this constantly.

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