Four Seasons 20966 A/C Condenser Fan Switch

Four Seasons 20966 Pressure Switch Overview

The Four Seasons 20966 pressure switch is a system-mounted A/C condenser fan switch built for high-side pressure control in select Toyota applications. It uses a round black male connector with 2 terminals and a 3/8 in. x 24 male thread for direct replacement service.

Compatible With 1985-1991 Toyota Corolla and 1988-1990 Toyota Pickup, this Four Seasons Pressure Switch line component is specified for condenser fan pressure control and meets or exceeds OEM requirements.

Key Features

• Four Seasons Pressure Switch, part number 20966
• A/C condenser fan switch for system-mounted high-side pressure control
• Round black connector with 2 terminals
• Male connector and male fitting with 3/8 in. x 24 thread size
• Steel construction for service replacement use
• Operate pressure points: 180 psi off, 225 psi on
• Meets or exceeds OEM specifications

Detailed Description

Four Seasons 20966 is a pressure-operated condenser fan switch used in the HVAC system to monitor high-side refrigerant pressure and trigger fan operation at the specified pressure range. This helps maintain proper condenser airflow control in vehicles that rely on a system-mounted pressure switch. It is a direct-fit service part for Toyota Corolla and Toyota Pickup applications listed below, and the part number 20966 is also referenced across multiple interchange numbers for replacement matching.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Condenser fan not cycling on at the correct pressure
• A/C system pressure control faults
• Intermittent fan operation tied to high-side pressure switching
• HVAC performance issues related to pressure switch failure
• Replacement needs for a worn or electrically inconsistent pressure switch

Installation Notes and Tips

Install the switch at the system-mounted high-side location specified for the vehicle. Verify the connector style, terminal count, and 3/8 in. x 24 male thread before installation. Confirm refrigerant system condition and electrical continuity after replacement to ensure the condenser fan responds at the correct pressure thresholds.

Fits 1985-1991 Toyota Corolla, N/A. Fits 1988-1990 Toyota Pickup, N/A. Compatible With Toyota Corolla and Toyota Pickup high-side mounted pressure switch applications.

Quality Assurance

Four Seasons identifies this pressure switch as meeting or exceeding OEM requirements, supporting OE-style service replacement for the listed Toyota applications.