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If there is not a pressure tap on the suction line(the larger pipe comming off of the compressor) you need to install a piercing valve with a 1/4" flare for the refrigerant hose and charge. Depending on the age of the window unit it might be worth buying a new one.

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16y ago

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Can you recharge a window AC unit with refrigerant?

No, you cannot recharge a window AC unit with refrigerant yourself. It requires a professional HVAC technician to safely and properly recharge the refrigerant in an AC unit.


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The recommended recharge window for a window AC unit to ensure optimal performance is typically every 2-3 years.


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Can you use the ac recharge kit sold at walmart to recharge a window ac unit?

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How to measure a window for an AC unit?

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What are the necessary steps for installing a window AC unit using the window AC installation kit?

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How do I properly install a window AC unit in my home?

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Does a window AC unit have to be installed in a window?

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