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The exact psi level of R-134a refrigerant varies depending on the temperature. At 70°F (21°C), the pressure is approximately 75 psi for the low side and around 150 psi for the high side in a typical air conditioning system. Always refer to the pressure-temperature chart specific to R-134a for accurate readings at different temperatures.

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3w ago

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What is the correct charge for a refrigerant 134a refrigerator freezer?

25-40 psi


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Could be you are low of R-134a. You can check the PSI level on the lowside with a gauge and if you are you can add R-134a. Any automotive store and some discount stores will have R-134a and gauges. Also you can check out the videos on the link below with show how to add R-134a to you car, and where to find the lowside port.


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You will add the R-134a thru your low side port. You will need a gauge to check the PSI level when filling. (You do not need the Manifold gauge set). There are a lot of all in one products you can purchase that have the R-134a and oil included in them. Some will even come with a reusable gauge.


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