94 limited A/C issues - JeepForum.com
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post #1 of 3 Old 05-09-2013, 07:18 PM Thread Starter
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1994 ZJ 
Join Date: Oct 2011
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94 limited A/C issues

I haven't worked with many A/C systems and what Im going through now is a first. Ive kind of been tossing money at it when I can but Im tired of it. The A/C has never worked since ive had it but was told that it worked great before I got it. Ive put a new compressor, clutch, pressure switch, cycle switch, and charged the system to where it needed to be. The clutch is now cycling and its blowing but not very cold. I can tell an improvement but not enough to say it is working. Any ideas for a next step to blow cold? Trying not to spend much more money.

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post #2 of 3 Old 05-09-2013, 07:59 PM
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1994 ZJ 
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Does the air temperature change when setting the temperature control knob between warm/cold? If not, blend door may not be working properly.
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post #3 of 3 Old 05-09-2013, 07:59 PM
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1995 ZJ 
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Its hard to tell with little information. A/C cycling can be normal but the rate of cycling vs ambient temp and blower motor speed is whats important. The hotter it is outside or the higher the blower speed selected the cycling should slow way down or not at all. Also having a set of guages and knowing how to read them is very important too. One last thing would be putting a trusted temp guage in a center vent and run A/C on MAX and check temp, adjust blower speed down to see what the coldest temp possible is. Things to try to get info on (high a low pressure readings comp on & off, discharge air temp out of panel register)

How much refrigerant have you installed, and have you checked for leaks? If the A/C seems to cycle fast then its probably a little low on refrigerant but before you start dumping more in you might try to verify that because it can also cycle from the high pressure cut out switch or a restriction too. If you put more in and cycle rate increases or comp stays off longer then you have a high pressure problem. If the cycling rate decreases or stays comp on longer you may be on the right track with adding a little more refrigerant.
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