How to Properly Install an HVAC Pressure Switch to Prevent Refrigerant Leaks on 2008 Dodge Viper?

During service and repair of the Refrigerant Pressure Sensor / Switch, first change the O-ring seal whenever the HVAC pressure switch is taken off as this helps stop refrigerant system leaks. Add some clean R-134a refrigerant oil to an O-ring seal and fit the O-ring which is intended for R-134a, to the discharge line opening, ensuring you use only the specified oil for the A/C compressor. After that, fit the HVAC pressure switch (2) onto the end of the A/C discharge line (1) and ensure it is tight. Next, attach (3) the wire harness connector to the HVAC pressure switch and after that, secure the negative battery cable.

OEM 2008 Dodge Viper HVAC Pressure Switch

Air Pressure Switch

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2 HVAC Pressure Switches found

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2008 Dodge Viper Check Valve Part Number: 5003461AA
$21.66 MSRP: $31.95
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Product Specifications
- Other Name: Valve Core - A/C Line, Low Side Adapter; Service Valve; HVAC Pressure Switch; A/C Trinary Switch; Pressure Switch; Service Valve; Suction Line Valve; Discharge Line Valve; Tube Assembly Valve.
- Replaces: 5011346AA
- Item Weight: 0.50 Pounds
- Item Dimensions: 0.3 x 3.8 x 4.1 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 5003461AA
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
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Fits the following 2008 Dodge Viper Submodels:
- SRT-10, SRT-10 ACR | 10 Cyl 8.3 L GAS, 10 Cyl 8.4 L GAS, 8.4L V10
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2008 Dodge Viper Pressure Switch Part Number: 5290274AB
Product Specifications
- Other Name: Switch - A/C Low Pressure Cut Off; HVAC Pressure Switch; A/C Compressor Cut-Out; Trinary Switch.; Lower Pressure Cut-Off Switch; Switch A/C Low Pressure Cut Off
- Item Weight: 0.50 Pounds
- Item Dimensions: 3.7 x 2.6 x 1.8 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 5290274AB
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
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Fits the following 2008 Dodge Viper Submodels:
- SRT-10, SRT-10 ACR | 10 Cyl 8.3 L GAS, 10 Cyl 8.4 L GAS

2008 Dodge Viper HVAC Pressure Switch Parts and Q&A

Q: How to Properly Install an HVAC Pressure Switch to Prevent Refrigerant Leaks on 2008 Dodge Viper?
A: During service and repair of the Refrigerant Pressure Sensor / Switch, first change the O-ring seal whenever the HVAC pressure switch is taken off as this helps stop refrigerant system leaks. Add some clean R-134a refrigerant oil to an O-ring seal and fit the O-ring which is intended for R-134a, to the discharge line opening, ensuring you use only the specified oil for the A/C compressor. After that, fit the HVAC pressure switch (2) onto the end of the A/C discharge line (1) and ensure it is tight. Next, attach (3) the wire harness connector to the HVAC pressure switch and after that, secure the negative battery cable.