Four Seasons 36663 A/C Condenser Fan Switch

Four Seasons 36663 Pressure Switch Overview

The Four Seasons Pressure Switch 36663 is a system-mounted A/C condenser fan switch built for pressure-based fan control in the HVAC system. It uses a 2-terminal male connector, a 3/8 in. x 24 fitting thread size, and a plastic/metal construction to meet OEM-level requirements.

Compatible With Chevrolet Lumina, Lumina APV, Corsica, Celebrity, Cavalier; Oldsmobile Silhouette, Cutlass, Cutlass Supreme, Cutlass Ciera, Firenza; Pontiac Trans Sport, 6000, Grand Prix; and Buick Century and Regal applications that use a hi-side mounted pressure switch.

Key Features

• Four Seasons Pressure Switch line for HVAC pressure control
• Part number 36663 for direct catalog identification
• System-mounted, hi-side condenser fan switch design
• 2-terminal male connector with harness connector 37227
• 3/8 in. x 24 fitting thread size
• Closed fan operation with 125 psi off and 190 psi on settings
• Plastic and metal construction
• Meets or exceeds OEM requirements

Detailed Description

Four Seasons 36663 is an A/C condenser fan pressure switch used to monitor refrigerant pressure and trigger fan operation at the specified pressure thresholds. This pressure switch is built for system-mounted hi-side applications and is listed for a wide range of GM vehicles, including Chevrolet Lumina and Corsica, Oldsmobile Cutlass and Silhouette, and Pontiac Grand Prix and Trans Sport. If you are replacing a failed HVAC pressure switch on a Chevrolet Celebrity or Buick Regal, this part number 36663 provides the correct style and connector configuration for the listed applications.

This part cross-references Hayden 5045 and Walker Exhaust 33976 for the same application.

What It Helps Fix

• A/C condenser fan not cycling on at the correct pressure
• Intermittent compressor or fan control caused by a faulty pressure switch
• HVAC pressure signal loss at the hi-side circuit
• Incorrect fan engagement due to worn switch contacts
• Replacement needs on vehicles with a system-mounted pressure switch

Installation Notes and Tips

Verify the connector style, terminal count, and fitting thread size before installation. Confirm the vehicle uses a hi-side mounted pressure switch and compare the original switch location and pressure settings to the specifications for Four Seasons 36663. Inspect the harness connector and refrigerant system condition during replacement to help ensure proper fan control after installation.

Quality Assurance

Four Seasons lists this pressure switch as meeting or exceeding OEM requirements, making it a direct-spec replacement option for the covered applications. The Four Seasons Pressure Switch 36663 is built for HVAC service where accurate pressure-based condenser fan operation is required.