Ranger 2WD L4-2.3L (2009)
High Pressure Safety Valve HVAC: Description and Operation
A/C Pressure Relief Valve
Air Conditioning
A/C Pressure Relief Valve
NOTE: If the A/C compressor is operating within limits and the A/C pressure relief valve is venting, or if the A/C pressure relief valve is leaking around
the threads, replace the A/C pressure relief valve and O-ring. If the A/C pressure relief valve still vents after it is replaced, diagnose the refrigerant
system for a restriction.
An A/C pressure relief valve is incorporated in the compressor manifold and tube assembly to:
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relieve unusually high refrigerant system discharge pressure buildups. For specifications regarding operating pressure(s), refer to Heating and Air
Conditioning.
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prevent damage to the A/C compressor and other system components.
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avoid total refrigerant loss by closing after the excessive pressure has been relieved.
The A/C pressure relief valve is a separate component and can be replaced separately from the A/C compressor manifold and tube assembly. It is
necessary to recover the refrigerant before removing the A/C pressure relief valve.
