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Dan M
Dodge Dakota
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5/18/2005
15:47:24
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 Subject: no pressure when a/c clutch engages
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Message:
I just changed out my evaporator core in my 95 CC 4x4. I got it all back together and put some R134 into the system. I have solid pressure reading on the low side until the clutch engages then the pressure drops to 0 and the clutch disengages. Anyone experienced this before?
I think I didn't seal the housing well enough, when i crank up the heat, I can't feel anything in my vents but can feel mega heat in my passenger floor board and even feel a wind. What do you all use to seal up the housing?
- Dan M
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yeah
Dodge Dakota
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5/18/2005
17:20:49
| RE: no pressure when a/c clutch engages
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Message:
not enough r-134
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Big Ed
Dodge Dakota
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5/18/2005
18:01:24
| RE: no pressure when a/c clutch engages
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First off, you should of put it into a vacuum after you changed out the evap. This gets all noncondensibles and air out of the system. Then after your sure there are no leaks, ect., charge the system. If the compressor is shutting off below about 15-20 psi on the low side, your short on refrigerant. Add it till you have about a 35 psig back pressure. (suction side) A good rule is when the suction line is cold at the compressor, its about right.
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RadioMan
Dodge Dakota
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5/19/2005
14:23:35
|  RE: no pressure when a/c clutch engages
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Message:
Big Ed is correct Dan M. Anytime you open the
system (zero pressure) you must vacuum the
entire system.
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