AC issue
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New Member
Joined: May 2017
Posts: 8
From: Timmins, Ontario, Canada
AC issue
On my 2007, my AC compressor isn't cycling. I have a gauge and the system has pressure, I've checked the fuses and they are good.
the fan on the condenser turns on when the AC button is pressed, but the clutch doesn't cycle at all. The low and high pressure lines don't get cold or hot.
not sure where to go from here. I know on other vehicles I had, we could jumper the compressor and it would kick in.
Options?
the fan on the condenser turns on when the AC button is pressed, but the clutch doesn't cycle at all. The low and high pressure lines don't get cold or hot.
not sure where to go from here. I know on other vehicles I had, we could jumper the compressor and it would kick in.
Options?
Member
Joined: Apr 2012
Posts: 1,095
From: Hebron, In
You said you read the pressure but did not state what it was on the low side. If it is low then the compressor will not cycle. If also could be other things like the compressor relay or a fuse. Pressure is the first thing to check.
There have also been some people that have had too much clearance on the compressor clutch and it would not engage. Removing a washer / spacer fixed their problem.
There have also been some people that have had too much clearance on the compressor clutch and it would not engage. Removing a washer / spacer fixed their problem.
Member
Joined: Sep 2015
Posts: 1,128
From: Digging in your fridge
High mileage?
Test for power at the compressor (if no power check for clutch relay problem)
Test field coil resistance (open circuit is bad)
Check air gap between clutch plate and pulley face (gap increases as parts wear, too much gap and the electromagnet can't pull it in)
Test for power at the compressor (if no power check for clutch relay problem)
Test field coil resistance (open circuit is bad)
Check air gap between clutch plate and pulley face (gap increases as parts wear, too much gap and the electromagnet can't pull it in)
Thread Starter
|
New Member
Joined: May 2017
Posts: 8
From: Timmins, Ontario, Canada
High mileage?
Test for power at the compressor (if no power check for clutch relay problem)
Test field coil resistance (open circuit is bad)
Check air gap between clutch plate and pulley face (gap increases as parts wear, too much gap and the electromagnet can't pull it in)
Test for power at the compressor (if no power check for clutch relay problem)
Test field coil resistance (open circuit is bad)
Check air gap between clutch plate and pulley face (gap increases as parts wear, too much gap and the electromagnet can't pull it in)
Member
Joined: Sep 2015
Posts: 1,128
From: Digging in your fridge
the fan on the condenser turns on when the AC button is pressed
There are two fans for the radiator/condenser....are you saying only one of the fans turns on when you try to run the AC?
Both fans are supposed to run.
Thread Starter
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New Member
Joined: May 2017
Posts: 8
From: Timmins, Ontario, Canada
Unsure, but the the AC button is depressed, a fan turns on within 1 second. The cooling fan does indeed work as well
Member
Joined: Sep 2015
Posts: 1,128
From: Digging in your fridge
3 fans must turn on when you turn on the AC:
The blower fan in the dash HVAC housing
Two fans on the radiator
If any of these fans do not operate when you turn on the AC, that's a problem.
If all 3 fans operate when you turn on the AC, that's good.
Return to reply #3 and test control circuits for the compressor clutch.
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