Another AC question.
#1
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So, I have an '03 2.5L X Type. So I replaced the condensor, drier, compressor, orifice tube and O rings. Filled the compressor with the correct amount of Pag oil and vacuumed system. Went to charge with 134A and the compressor wouldn't kick in. I checked all the fuses and swapped out the compressor relay and nothing. I jumped the relay and the clutch kicked in but was not taking in any refrigerant. Also I noticed the fans were not on. Any ideas?
#2
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Don B (07-21-2024)
#3
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Hi italcarnut,
An old-timer trick when charging an empty system is to inject about 1/2 can (6 ounces) of refrigerant into the high-side port while holding the can upside down. This will get some liquid refrigerant into the system to quickly build sufficient pressure for the low pressure switch to re-enable the compressor clutch. Once the clutch kicks in, immediately close the high side valve on your manifold gauge set and do the rest of your charge via the low side valve/port, holdind the refrigerant cans upright or rocking them between upright and horizontal, but never tipping them upside down again. It can also help to sit the can of refrigerant in a pan of hot water to resist the can's tendency to ice up.
Don't forget to bleed the air out of the hose that connects the refrigerant can to your manifold gauges before opening the high- or low-side valves to charge the vehicle system.
Cheers,
Don
An old-timer trick when charging an empty system is to inject about 1/2 can (6 ounces) of refrigerant into the high-side port while holding the can upside down. This will get some liquid refrigerant into the system to quickly build sufficient pressure for the low pressure switch to re-enable the compressor clutch. Once the clutch kicks in, immediately close the high side valve on your manifold gauge set and do the rest of your charge via the low side valve/port, holdind the refrigerant cans upright or rocking them between upright and horizontal, but never tipping them upside down again. It can also help to sit the can of refrigerant in a pan of hot water to resist the can's tendency to ice up.
Don't forget to bleed the air out of the hose that connects the refrigerant can to your manifold gauges before opening the high- or low-side valves to charge the vehicle system.
Cheers,
Don
Last edited by Don B; 07-21-2024 at 05:06 PM.
#4
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I am charging through the low port. High side closed. I was wondering if I left some connector off. like a trinary switch or something. Where would that be located. Don, interesting idea about opening the high side to get the compressor going, however I jumped the relay and the compressor was on and still it took no refrigerant. Weird.
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I am charging through the low port. High side closed. I was wondering if I left some connector off. like a trinary switch or something. Where would that be located. Don, interesting idea about opening the high side to get the compressor going, however I jumped the relay and the compressor was on and still it took no refrigerant. Weird.
Cheers,
Don
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![](https://cimg2.ibsrv.net/gimg/www.jaguarforums.com-vbulletin/597x477/mastercool_manifold_gauges_490fb71d950ffb294262e410b699834874794eac.jpg)
If you're doing it the same as the Chris Fix video Dell posted, it should work. Notice the direction he turns the the valves on the port connector fittings to open them...
Cheers,
Don
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