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Low refrigerant level. 2 cans is probably not enough. You can't have the system accurately charged if you don't use a gauge. Using a gauge, run the AC and you'll notice that the low pressure side drops so far that the pressure switch is kicking the system off. Watch the gauge as you add refrigerant and make sure you don't overfill it, but you do probabbly need some more.

If you originally charged the system and then changed a switch and added 2 cans, it could also be overcharged. Jump out the low pressure switch to verify wether it is that particular one that is the problem. The High side pressure on 134a is higher than r12 and it is possible that is the switch giving you problems.


2010-02-17 03:12:20
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