Red Dot 4379-RD564300 High Pressure Switch – Normally Open 300/210 PSI Fuel Injector O-Ring Kit Visible refrigerant or oil leaks

Visible refrigerant or oil leaks from compressor seals

Freightliner/OEM: ABPN83-301361

Stemco: S-21714

Verify the existing relay is the 12V intermittent-duty 4-terminal pattern (not the continuous-duty MSW-1242 / 2MR350 variant) before ordering

Red Dot 4379-RD564300 High Pressure Switch – Normally Open 300/210 PSI Fuel Injector O-Ring Kit Visible refrigerant or oil leaksBuilt for Class 8 A C service, the 2601259 pressure switch ships ready to install. This normally open pressure switch controls fan override and compressor cycling at elevated A C pressures. 1 4" female thread fitting for universal compatibility. Signs You Need a New High Pressure Switch Cooling fan not engaging at high pressure A C system pressure not regulating properly Compressor running continuously without pressure relief High pressure cutout not