Air Con Pressure Switch - NRF 38900

The NRF Air Con Pressure Switch 38900 is engineered to meet or exceed high industry standards for ...

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NRF Pressure Switch VW,AUDI,FORD 38900 1H0959139A,1H0959139B,7M3959139 Air Conditioning Pressure Switch,Pressure Switch, air conditioning 7238088

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Product Information

Full details

The NRF Air Con Pressure Switch 38900 is an essential component for automotive technicians and DIY mechanics looking to restore or maintain efficient vehicle climate control systems. Engineered to meet or exceed industry standards, this switch ensures that your air conditioning system operates at the correct pressure levels for optimal cooling performance. While it is a durable and reliable aftermarket solution, users should verify their vehicle's specific thread compatibility and refrigerant type before installation to ensure a perfect fit.

All features

Model Part Number	38900
Brand	NRF

Extended Product Information

FAQs

Is this switch compatible with R12 refrigerant?

No, the NRF 38900 is specifically designed for R 134a refrigerant systems.

Can I install this without emptying the AC system?

Generally, no. Removing the pressure switch usually results in the release of pressurized refrigerant, which requires specialized recovery equipment.

What does the 7/16-20 thread specification mean?

This refers to the diameter and thread count of the connector, ensuring it matches the AC port on your vehicle.

Does this switch come with a warranty?

NRF components are manufactured to high standards; please consult your point of purchase for specific warranty coverage terms.

How do I know if my pressure switch is bad?

Common symptoms include the AC clutch failing to engage, the compressor cycling too frequently, or the AC only working intermittently.

Troubleshooting

AC compressor fails to engage

Check if the switch is receiving 12V power and verify that the system refrigerant charge is within the manufacturer's specified range.

Visible refrigerant leak at the switch base

Ensure the provided gasket or seal was installed correctly and the switch is tightened to the recommended torque specifications.

Pros and Cons

Pros

Meets or exceeds industry performance standards
Includes essential gaskets and seals for immediate installation
Broad compatibility with diverse vehicle makes and models
Reliable regulation of system pressure to protect the compressor

Cons

Specific to 7/16-20 thread connections
Requires professional AC evacuation tools to install safely
Limited to R 134a refrigerant systems only

Setup, Compatibility & Care

Installation

Ensure the vehicle's AC system has been properly evacuated by a certified professional to avoid refrigerant release.
Locate the existing pressure switch on the high or low-pressure side of the AC lines.
Disconnect the electrical connector and unscrew the old unit using a flare nut wrench.
Apply the included new gaskets or seals to the NRF 38900.
Screw the new switch into place until snug; do not overtighten, as this may damage the threads.
Reconnect the electrical harness and have the system recharged by a technician.

Care

Keep the electrical terminals free of corrosion by applying a small amount of dielectric grease. Periodically inspect the area around the switch during routine engine maintenance for any signs of refrigerant seepage.