Four Seasons 20690 A/C Power Module

Four Seasons 20690 A/C Power Module

Four Seasons 20690 is an A/C power module for Automatic Temperature Control (ATC) HVAC systems. It is built with a black female connector layout, blade terminals, and an aluminum/plastic housing for direct replacement service in supported vehicles.

Compatible With 1997-1999 Buick LeSabre, 1997-1999 Oldsmobile 88, 1997-1999 Oldsmobile LSS, 1997-1999 Pontiac Bonneville, and 1997-1998 Oldsmobile Regency applications that use automatic climate control. Four Seasons 20690 meets or exceeds OEM requirements and is a direct-fit power module for variable-speed HVAC control.

Key Features

• Brand: Four Seasons Power Module line
• Part number: 20690
• A.T.C. A/C power module for automatic temperature control systems
• Variable-speed operation for HVAC blower control
• Black female connectors with square/oval connector shape
• Blade terminal design with 3 & 1 terminal layout
• Aluminum/plastic housing construction
• Meets or exceeds OEM specifications

Product Details

The Four Seasons Power Module line focuses on HVAC electrical control components that manage blower motor output in automatic climate control systems. This Four Seasons 20690 module is specified for vehicles equipped with ATC, where the HVAC system relies on electronic power control rather than a simple manual switch. It cross-references ACD158684 and 158684 for the same application.

Use this part number 20690 when servicing automatic A/C systems in Buick LeSabre, Oldsmobile 88, Oldsmobile LSS, Pontiac Bonneville, and Oldsmobile Regency models listed in the fitment data. The connector style, terminal layout, and variable-speed design support a direct replacement for the original HVAC power module.

What It Helps Solve

• Blower motor that does not respond correctly to automatic climate control commands
• Intermittent HVAC fan operation
• Loss of variable blower speed control
• Automatic A/C system electrical control faults
• Replacement needs for a failed HVAC power module

Installation Notes and Tips

Verify that the vehicle is equipped with Automatic Temperature Control before ordering. Match the connector shape, terminal type, and housing style to the original module before installation. Confirm the application by year, make, and model, especially on 1997-1999 Buick LeSabre and 1997-1999 Pontiac Bonneville vehicles, where automatic A/C equipment is required.

Inspect the HVAC connector and related wiring for heat damage or corrosion before installing the new module. A damaged blower motor or wiring fault can affect module performance, so the full circuit should be checked during diagnosis.

Quality Assurance

Four Seasons lists this module as meeting or exceeding OEM requirements, making it a direct replacement option for supported ATC-equipped vehicles. Part number 20690 is built for the specified HVAC control application and follows the original connector and terminal configuration.