Four Seasons 36490 HVAC Cut-Off Switch

Four Seasons 36490 Pressure Switch Overview

Four Seasons 36490 is a system-mounted HVAC cut-off pressure switch for 12-volt air conditioning systems. It uses a female 10mm x 1.25 threaded fitting, a 2-pin pin terminal connection, and a weather-pack style connector for secure electrical contact in demanding underhood conditions.

Built as a high cut-out pressure switch, this Four Seasons Pressure Switch line component helps control A/C system operation by responding to high-side pressure thresholds. It meets or exceeds OEM requirements and is listed for Chrysler Town & Country, Dodge Caravan, Dodge Grand Caravan, Plymouth Grand Voyager, and Plymouth Voyager applications.

Key Features

• Four Seasons Pressure Switch part number 36490
• HVAC cut-off switch for system-mounted A/C pressure control
• High cut-out style with closed compressor open/closed state
• Female connector and female 10mm x 1.25 fitting thread
• 2-terminal pin design with weather-pack connection
• Plastic and metal construction in gray finish
• Meets or exceeds OEM specifications

Detailed Description

Four Seasons 36490 is a pressure-operated HVAC cut-off switch used in high-pressure A/C system control. It is designed for 12-volt vehicles and mounts directly in the system, with a female threaded port and pin-style electrical terminals for a direct replacement-style installation. The switch is specified as closed and set for high cut-out operation at 435 psi, with high-on operation at 300 psi.

This part number 36490 is listed for 1993-1995 Chrysler Town & Country, 1993-1995 Dodge Caravan, 1993-1995 Dodge Grand Caravan, 1993-1995 Plymouth Grand Voyager, and 1993-1995 Plymouth Voyager. If you are replacing a Chrysler Town & Country A/C pressure switch or a Dodge Caravan HVAC cut-off switch, verify connector style, thread size, and pressure calibration before installation.

This part cross-references Karlyn 50237 for the same application.

Common Issues This Part Can Address

• A/C compressor shutdown caused by high system pressure
• Intermittent compressor cycling from a failing pressure switch
• Loss of HVAC cut-off function in system-mounted applications
• Electrical connection problems at the pressure switch terminal
• Incorrect pressure response in the high-side A/C circuit

Installation Notes and Tips

Confirm the original switch uses a 10mm x 1.25 female thread, a 2-pin pin terminal layout, and a system-mounted configuration before replacement. Inspect the connector for corrosion or heat damage and verify the A/C system pressure condition before installing the new switch. On Chrysler Town & Country, Dodge Caravan, Dodge Grand Caravan, Plymouth Grand Voyager, and Plymouth Voyager models, match the pressure rating and connector style to the original part for proper operation.

Quality Assurance

Four Seasons 36490 is manufactured to meet or exceed OEM specifications for fit and function in supported HVAC applications. The Four Seasons Pressure Switch line is built for direct replacement use in vehicle air conditioning systems where accurate pressure control is required.