Four Seasons 37643 HVAC Blower Control Switch
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Four Seasons
 Selector Switch

Four Seasons 37643 HVAC Blower Control Switch

Brand Four Seasons TD4649W
Color Black
Inside Diameter 3.98
Item Grade Standard Replacement
Material Rubber
Outside Diameter 5.67
Position(s) Front Upper
Shape Round
Thickness 0.28
Universal Or Specific Fit Specific
Width 5.67
Product line Selector Switch
Fits —12 vehicles

Vehicle-specific fit. Blower control switch made for a direct, application-matched replacement.

Selector switch. Controls blower speed with a simple, reliable switching action.

Plastic housing. Lightweight construction with a rectangular female connector and blade terminals.

Cross-references Four Seasons 37643, Monroe Shocks & Struts 210243 and 1S8778 for the same application. See all 7.

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Four Seasons 37643 HVAC Blower Control Switch

The Four Seasons Selector Switch 37643 is a vehicle-specific HVAC blower control switch built for 12-volt systems with a 20-amp amperage rating. It uses a rectangular female connector with 6 blade terminals and a non-illuminated plastic housing for direct replacement service.

Compatible With 2004-2007 Chevrolet Aveo and 2006-2007 Chevrolet Aveo5, this blower switch is a direct-fit solution for restoring cabin fan speed control. The Four Seasons Selector Switch line focuses on replacement HVAC electrical components for specific vehicle applications.

Key Features

  • Part number 37643 HVAC blower control switch
  • Vehicle-specific fitment for select Chevrolet Aveo and Aveo5 models
  • 12-volt electrical design with 20-amp amperage rating
  • 6-terminal blade connection with rectangular female connector
  • Plastic housing, non-illuminated design
  • Selector switch / blower switch configuration

Detailed Description

Four Seasons 37643 is an HVAC blower control switch used to manage blower motor speed selection in the vehicle’s climate control system. It is specified for select 2004-2007 Chevrolet Aveo and 2006-2007 Chevrolet Aveo5 models, making it a direct replacement for applications that require the same connector style, terminal count, and electrical rating. If you are searching for a Chevrolet Aveo blower control switch or a Four Seasons 37643 replacement, this part matches the listed vehicle-specific configuration.

This part cross-references 1S8778 and 210243 for the same application.

What It Helps Fix

  • Blower fan speeds that do not respond correctly
  • Intermittent HVAC fan operation
  • Loss of one or more blower speed settings
  • Worn or damaged selector switch contacts
  • Electrical connection issues at the HVAC control panel

Installation Notes and Tips

Verify connector shape, terminal count, and amperage rating before installation. Confirm vehicle year, make, and model against the listed fitment for the Chevrolet Aveo and Chevrolet Aveo5. Because this is a vehicle-specific HVAC blower control switch, matching the original switch layout is important for proper operation.

Quality Assurance

Four Seasons manufactures replacement HVAC electrical components for specific vehicle applications, and this selector switch is built to the listed electrical and connector specifications for direct-fit service.

Related reading

This part fits 12 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2007ChevroletAveoN/ASelector Switch
2007ChevroletAveoN/APrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2007ChevroletAveo5N/ASelector Switch
2007ChevroletAveo5N/APrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2006ChevroletAveoN/ASelector Switch
2006ChevroletAveoN/APrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2006ChevroletAveo5N/ASelector Switch
2006ChevroletAveo5N/APrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2005ChevroletAveoN/ASelector Switch
2005ChevroletAveoN/APrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2004ChevroletAveoN/ASelector Switch
2004ChevroletAveoN/APrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
Directly replaces or cross-references 7 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 37643Monroe Shocks & Struts — 2102431S8778155053296618807A10243SW6255