Air Conditioning and Coolant
Saturn S-Series
Chevy 305
Clouds

Does adding freon go to high or low pressure side?

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2007-05-27 12:03:39
2007-05-27 12:03:39

Always to the low pressure side. The low pressure side fitting is normally near the dryer ( large silver canister).

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Charged on the low side service port. If you connect a small can of Freon to the high side with the system on, the can may explode from the high pressure introduced into it.....

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Charged on the low side service port. If you connect a small can of Freon to the high side with the system on, the can may explode from the high pressure introduced into it.....

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Yes the ac lines are under pressure. The high side is under dangerously high pressure. The Freon needs to be removed by a reclaiming machine and the pressure will be removed.

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It depends on the outside temperature but the average low side pressure should be around 35 to 40 psi and the high side should be no higher than 250 psi..........

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Take this to a professional. You have neither the tools nor the expertise to repair. If you tried to add freon to the high side, you've already cheated death once. That side has more pressure than the refill can and it may flow from the system into the can and cause it to explode.

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