How to charge a home air conditioner with R22?

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How to Charge a Home AC Compressor With R-22 Step 1. Turn on the air-conditioning system. Turn the thermostat to its coolest setting. Step 2. Remove the caps covering the outside AC unit’s R-22 refrigerant valves. These are found on the pipes entering… Step 3. Screw an R-22 manifold gauge’s …

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