I was looking at the AC on a '95 850. The AC just quit yesterday. Seems to have freon in the system but the compressor will not kick on. I tried bumping the the front of the compressor, serving it a little, and even jumped the low pressure switch connector at the wire plug near the firewall. No action at all. It is MCC.
Any suggestions?
Is the AC fried on this Volvo 850?
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rspi
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Is the AC fried on this Volvo 850?
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
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Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
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Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
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jblackburn
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What's the low-side pressure with compressor not running?
Could be a bad relay, or it may just need the compressor shimmed.
Could be a bad relay, or it may just need the compressor shimmed.
'98 S70 T5
2016 Chevy Cruze Premier
A learning experience is one of those things that says, "You know that thing you just did? Don't do that."
mercuic: Long live the tractor motor!
2016 Chevy Cruze Premier
A learning experience is one of those things that says, "You know that thing you just did? Don't do that."
mercuic: Long live the tractor motor!
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rspi
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My gauge is wacky but no freon would go in.
The clutch gap seemed real close. Likely good. I'm going to check for power at the low pressure switch.
I checked several relays, swapped a few around and back.
The clutch gap seemed real close. Likely good. I'm going to check for power at the low pressure switch.
I checked several relays, swapped a few around and back.
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
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Ozark Lee
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Hot wire the compressor wire to the + battery terminal and see if it kicks on then. If not, check the clutch wire for resistance to ground, if it reads an open circuit the compressor clutch is fried.
...Lee
...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
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rspi
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Thanks guys.
I know of 2 wires coming off the compressor, the one in the white sleeve and the other smaller one. Are you saying that I should put 12v on the one in the white sleeve?
How do I check the clutch wire for resistance? Is that the small wire or the one in the white sleeve? Should the other wire be connected to it's plug?
I know of 2 wires coming off the compressor, the one in the white sleeve and the other smaller one. Are you saying that I should put 12v on the one in the white sleeve?
How do I check the clutch wire for resistance? Is that the small wire or the one in the white sleeve? Should the other wire be connected to it's plug?
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
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abscate
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Robert - one wire is a temp sensor and will end at a pot stuck somewhere on the AC compressor. The other wire will disappear into the guts of the compressor at the clutch. Thats the one to put 12 volts on. I would make up a fused (30Amp) test wire to do this in case you short it while testing. You can label it VOLVO AC CLUTCH TEST TOOL and sell it on ebay for 35 USD when done.
Empty Nester
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A Captain in a Sea of Estrogen
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northernlights
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The high pressure switch (near the dryer) will also keep the clutch from engaging. I don't know if that is normally open or closed.rspi wrote:My gauge is wacky but no freon would go in.
The clutch gap seemed real close. Likely good. I'm going to check for power at the low pressure switch.
I checked several relays, swapped a few around and back.
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rspi
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I guess I can compare it to my car side by side since they are both '95's.
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
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