Four Seasons 36669 A/C Condenser Fan Switch

Four Seasons 36669 A/C Condenser Fan Switch

The Four Seasons Pressure Switch 36669 is a system-mounted A/C condenser fan switch built for pressure-based fan control in select GM applications. It uses a 2-terminal male connector with a red connector body and a 3/8 in. x 24 fitting thread size for a direct-style service replacement.

Compatible with Chevrolet Corvette, Camaro, Lumina, Cavalier, Cadillac Cimarron, Pontiac Firebird, Oldsmobile Firenza, and Buick Skylark applications listed below, this Four Seasons 36669 pressure switch meets or exceeds OEM requirements and is built from plastic and metal materials.

Key Features

• Pressure-style A/C condenser fan switch for system-mounted applications
• 2-terminal male connector with red connector color
• 3/8 in. x 24 fitting thread size
• Closed fan operation
• Operate pressure range: 185 psi off, 250 psi on
• Meets or exceeds OEM specifications
• Four Seasons Pressure Switch line replacement part number 36669

Product Details

The Four Seasons Pressure Switch line is built for HVAC service work where accurate pressure signaling is needed to control condenser fan operation. Part number 36669 is a hi-side mounted pressure switch that helps maintain proper A/C system response by switching at the specified pressure thresholds. This part cross-references DENSO Auto Parts 5047 for the same application.

Fits 1985-1993 Chevrolet Corvette, N/A; Fits 1985-1992 Chevrolet Camaro, N/A; Fits 1990 Chevrolet Lumina, N/A; Fits 1985-1986 Chevrolet Cavalier, N/A; Fits 1985-1987 Cadillac Cimarron, N/A; Fits 1985-1992 Pontiac Firebird, N/A; Fits 1985-1986 Oldsmobile Firenza, N/A; Fits 1985 Buick Skylark, N/A.

What It Helps Solve

• Condenser fan not cycling on at the correct pressure
• A/C system pressure control faults
• Intermittent fan operation tied to a worn pressure switch
• Loss of proper hi-side fan activation in serviceable HVAC systems
• Replacement needs for a failed system-mounted pressure switch

Installation Notes

Verify connector style, thread size, and pressure calibration before installation. This switch uses a male 2-terminal harness connection and a 3/8 in. x 24 fitting thread size, so matching the original electrical connector and mounting location is important for proper service fitment. Confirm the vehicle’s A/C condenser fan switch application against the listed fitment before replacement.

Quality Assurance

Four Seasons lists this part as meeting or exceeding OEM requirements, making it a service-grade replacement for pressure-controlled condenser fan operation in the covered Chevrolet, Pontiac, Cadillac, Oldsmobile, and Buick applications.