Air Conditioning problem "HELP"
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Senior User
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From: Pullman Washington
Air Conditioning problem "HELP"
So the problem is: AC on blows hot air | AC Clutch not engauging | High & Low Pressure is GOOD...
I am thinking it is one of the sensors. Not sure of the terminology for them but the one located on the Highside (Front) & Lowside (Firewall) mounted on top of the dryer can?? Or could it be the Clutch Armature??
Any input or Diagrams would be greatly appreciated.
Cheers,
Brad
I am thinking it is one of the sensors. Not sure of the terminology for them but the one located on the Highside (Front) & Lowside (Firewall) mounted on top of the dryer can?? Or could it be the Clutch Armature??
Any input or Diagrams would be greatly appreciated.
Cheers,
Brad
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Senior User
Joined: Mar 2005
Posts: 141
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From: Pullman Washington
Originally Posted by projectSHO89
How can you possibly know the the low and high side pressures are GOOD when the compressor won't engage.......
Start by identifying your vehicle FULLY.
Start by identifying your vehicle FULLY.
The pressures look good in that the high side is @ 130 & the low side is @ 115 with no pump activity. W/Pump activity I am pretty sure it would be in the correct range. The system worked flawlessly and all of the sudden the clutch does not engauge.
I know its not rocket science here and it should be easy to narrow down. I just thought someone else may have exp'd the same scenario and give me a bit of a lead. I don't like taking my chit to the shop & its definatley not my first rodeo.
After tinkering with it today I come to the same conclusions. High or lowside sensors or the clutch coil.
Thanks,
Brad
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Joined: Jan 2004
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From: St Louis
If the compressor is not operating, the pressures HAVE TO BE THE SAME on both sides. They cannot be different. I suspect your guages might just be reading a bit off compared to each other.
See the other thread I posted in last evening. If gives good starter info.
Steve
See the other thread I posted in last evening. If gives good starter info.
Steve
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From: St Louis
Fleet Mechanic
Joined: Feb 2006
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From: Lorain County, Ohio
Here's 2 quick checks to make that take no tools and about 5 minutes:
-Bump the compressor clutch with a broom stick or other siutable device. If it kicks in, the gap is too wide. If not:
- Locate the Low Side Cycling Switch on the accumulator. Jumper across the connector and see if the clutch engages. If so, the switch has failed. (The pressures you gave may not indicate a proper charge, but they are high enough to close the switch).
If both of these tests fail, check for B+ and Ground at the compressor connector. If none, work your way back through the system to see where you lose voltage..
-Bump the compressor clutch with a broom stick or other siutable device. If it kicks in, the gap is too wide. If not:
- Locate the Low Side Cycling Switch on the accumulator. Jumper across the connector and see if the clutch engages. If so, the switch has failed. (The pressures you gave may not indicate a proper charge, but they are high enough to close the switch).
If both of these tests fail, check for B+ and Ground at the compressor connector. If none, work your way back through the system to see where you lose voltage..
