Hello, You have two switches which work off the pressure of the Freon. Both of these switches cut off the power to the compressor. One is for HIGH pressure and the other is for LOW pressure. Check for power at the compressor clutch connector harness while the controls are set and the engine is running. You may have power and a bad clutch.
When you say that the Freon pressure is good, does that mean the pressure is within the proper range? Too much Freon will make the HIGH switch cut off power and too little will make the LOW pressure switch cut off power.
The ideal amount(ozs) of Freon is what is recommended by the Manufactuer and it will provide a moderate amount of pressure of about 35psi-40psi. You can borrow pressure gauges, called Manifold gauges to measure your system at autoparts stores with loaner programs.
The low pressure side of the system is the one you use to induce the Freon to go into an empty system. You can bypass this switch by taking off the connector and putting a "U" shaped jumper into the harness and the compressor clutch should get power to LOCK up all of the time.
You can take off the switch connector at the compressor clutch and then check for power when bypassing the HIGH pressure switch if the LOW pressure switch does not make the system get power. Only, really only bypass the HIGH pressure switch with the clutch connector disconnected. The HIGH switch is there to prevent damage to all of the components from seals to lines to every piece of Freon hardware in the car. Bypassing with the A/C clutch disconnected will allow you to know if power is getting to the compressor clutch.
Finally, you can get FREE wiring and fusebox diagrams through Autozone.com. Just sign and register to their site and then you can print the documents for yourself.
Good luck with this repair and I hope my solution helps you.
SOURCE: 94 jeep cherokee ac blows cool on medium only. recent recharge freon help cool more.
could be anything overcharging the system, freon leak faulty componets like compressor or clogged lines or orfice tube or dirty evap. coil check for 12 volts comming into the blower motor with ur switch on high if ur getting 12 volts at the plug then replace ur blower motor
SOURCE: 2001 jeep cherokee sport 4.0L
Is there power to the A/C relay? Did you receive the wiring diagram i sent to you?
SOURCE: Electric fan on rad won't cycle.
just finished doing the exact task and i didnt find it to bad 1 hour, remove bullbar/bumper and i was able to remove with a 8mm socket ,angle drive and extension 1/4 drive.
make sure when you replace with new item you thoroughly clean surface before you put your new one on,relay has heat sinc and neads the car body cantact area to help absorb the heat,
If it is dirty and you dont clean it your new relay may overheat .
Also for all Chrysler jeep and dodge owners, PPPPlease stop supporting your local rip off dealer and look for alternatives , I use rockauto.com from america and are more than happy with price and delivery times 3-5 days and usually 1/3 the price unbelivable.
SOURCE: 1999 Jeep Grand Cherokee AC high pressure switch tripping.
did you add freon to your system if so how much try letting some out.
SOURCE: I am trying to replace the radiator cooling fan
here can find two documents:
- Jeep XJ Cooling-System Section 7
- Jeep XJ Cooling-System Section 7a
Also, the other sections about Jeep XJ Cherokee Service Manual
Hope thats help (remember rated this). Good luck.
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