Four Seasons 37639 HVAC Blower Control Switch

OE Quality 60-Day Returns

Selector Switch

Four Seasons 37639 HVAC Blower Control Switch

Brand	Four Seasons 96355
Center Electrode Core Material	Copper
Center Electrode Tip Material	Ruthenium
Electrical Terminal Type	Non-Removable Nut
Ground Configuration	Standard
Ground Electrode Core Material	Nickel
Ground Electrode Quantity	1
Ground Electrode Tip Design	Dual Fine Electrode - High Ignitability
Hex Size	5/8
Insulator Height	50.50
Manufacturer Heat Range	5
Part Number	LFR5AHX
Pre-Gap Size	.044
Reach	26.5
Resistance	5000
Seat Type	Flat
Stock Number	96355
Thread Diameter	14.00
Product line	Selector Switch
Fits	—97 vehicles

Selector switch. Controls blower speed with a square male connector.

5 terminals. Provides a direct electrical interface for HVAC blower control.

Blower control switch. Built for selector-style HVAC operation.

Cross-references Four Seasons 37639, 1S1405 and 1571147 for the same application. See all 8.

$32.54Free shipping

In stock · usually ships same day before 1pm CST

Step 1 — Confirm fitment

Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

Step 2 — Quantity

Free shipping to the continental U.S.

Free returns within 60 days if it doesn't fit when fitment is verified.

Not what you need? See all HVAC Blower Control Switch options

HVAC Blower Control Switch for Classic GM Applications

Restore blower speed selection with this Four Seasons Selector Switch, part number 37639. This HVAC blower control switch uses a 5-terminal, male, square connector layout for direct replacement in supported vehicles, including Chevrolet Camaro, Pontiac Firebird, and other GM platforms listed below.

Key Features

Four Seasons Selector Switch product line
HVAC blower control switch / blower selector switch
Male connector with square connector shape
5-terminal electrical design
Direct-fit replacement for select GM HVAC controls
Part number 37639 for ordering and cross-reference

Detailed Product Overview

Four Seasons 37639 is a blower selector switch used in HVAC control systems to route blower motor speed commands through the dash control assembly. It is specified as a blower-type switch with a male, square connector and five terminals, making it a practical replacement for worn or intermittent HVAC controls in compatible vehicles. This part cross-references A10239 and SW1456 for the same application. The Four Seasons Selector Switch line focuses on replacement HVAC electrical components for vehicles that need accurate control input at the dash.

Compatible With 1982-1992 Chevrolet Camaro, N/A; 1982-1992 Pontiac Firebird, N/A; 1989-1991 Oldsmobile Delta 88, N/A; 1988-1990 Chevrolet Caprice, N/A; 1988 Oldsmobile Cutlass Calais, N/A; 1986-1988 Pontiac Fiero, N/A; 1985-1987 Oldsmobile Calais, N/A; 1985 Chevrolet Citation II, N/A; 1982-1985 Chevrolet S10, N/A; 1983-1985 Chevrolet S10 Blazer, N/A; 1982-1985 GMC S15, N/A; 1983-1985 GMC S15 Jimmy, N/A.

Common Issues This Part Addresses

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

Installation Notes and Tips

Verify connector style, terminal count, and vehicle application before installation. This part uses a male, square 5-terminal configuration, so compare the existing switch and harness connector on the vehicle before purchase. For fitment-based searches, this part is commonly sought as a 1982-1992 Chevrolet Camaro blower control switch, a 1982-1992 Pontiac Firebird HVAC selector switch, and a Four Seasons 37639 replacement for select GM HVAC systems.

Quality Assurance

Four Seasons supplies HVAC replacement components for automotive repair applications, and this selector switch is cataloged for specific GM fitments to support accurate part matching. Confirm the vehicle year, make, model, and HVAC control configuration against the listed applications before ordering.

This part fits 97 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Position	Notes
1992	Chevrolet	Camaro	N/A	Selector Switch
1992	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1992	Pontiac	Firebird	N/A	Selector Switch
1992	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1991	Chevrolet	Camaro	N/A	Selector Switch
1991	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1991	Oldsmobile	Delta 88	N/A	Selector Switch
1991	Oldsmobile	Delta 88	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1991	Pontiac	Firebird	N/A	Selector Switch
1991	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1990	Chevrolet	Camaro	N/A	Selector Switch
1990	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1990	Chevrolet	Caprice	N/A	Selector Switch
1990	Chevrolet	Caprice	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1990	Oldsmobile	Delta 88	N/A	Selector Switch
1990	Oldsmobile	Delta 88	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1990	Pontiac	Firebird	N/A	Selector Switch
1990	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1989	Chevrolet	Camaro	N/A	Selector Switch
1989	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1989	Chevrolet	Caprice	N/A	Selector Switch
1989	Chevrolet	Caprice	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1989	Oldsmobile	Delta 88	N/A	Selector Switch
1989	Oldsmobile	Delta 88	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1989	Pontiac	Firebird	N/A	Selector Switch
1989	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1988	Chevrolet	Camaro	N/A	Selector Switch
1988	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1988	Chevrolet	Caprice	N/A	Selector Switch
1988	Chevrolet	Caprice	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1988	Oldsmobile	Cutlass Calais	N/A	Selector Switch
1988	Oldsmobile	Cutlass Calais	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1988	Pontiac	Fiero	N/A	Selector Switch
1988	Pontiac	Fiero	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1988	Pontiac	Firebird	N/A	Selector Switch
1988	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1987	Chevrolet	Camaro	N/A	Selector Switch
1987	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1987	Oldsmobile	Calais	N/A	Selector Switch
1987	Oldsmobile	Calais	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1987	Pontiac	Fiero	N/A	Selector Switch
1987	Pontiac	Fiero	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1987	Pontiac	Firebird	N/A	Selector Switch
1987	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1986	Chevrolet	Camaro	N/A	Selector Switch
1986	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1986	Oldsmobile	Calais	N/A	Selector Switch
1986	Oldsmobile	Calais	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1986	Pontiac	Fiero	N/A	Selector Switch
1986	Pontiac	Fiero	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1986	Pontiac	Firebird	N/A	Selector Switch
1986	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1985	Chevrolet	Camaro	N/A	Selector Switch
1985	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1985	Chevrolet	Citation II	N/A	Selector Switch
1985	Chevrolet	Citation II	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1985	Chevrolet	S10	N/A	Selector Switch
1985	Chevrolet	S10	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1985	Chevrolet	S10 Blazer	N/A	Selector Switch
1985	Chevrolet	S10 Blazer	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1985	GMC	S15	N/A	Selector Switch
1985	GMC	S15	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1985	GMC	S15 Jimmy	N/A	Blower Motor Switch; Selector Switch
1985	Oldsmobile	Calais	N/A	Selector Switch
1985	Oldsmobile	Calais	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1985	Pontiac	Firebird	N/A	Selector Switch
1985	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1984	Chevrolet	Camaro	N/A	Selector Switch
1984	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1984	Chevrolet	S10	N/A	Selector Switch
1984	Chevrolet	S10	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1984	Chevrolet	S10 Blazer	N/A	Selector Switch
1984	Chevrolet	S10 Blazer	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1984	GMC	S15	N/A	Selector Switch
1984	GMC	S15	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1984	GMC	S15 Jimmy	N/A	Blower Motor Switch; Selector Switch
1984	Pontiac	Firebird	N/A	Selector Switch
1984	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1983	Chevrolet	Camaro	N/A	Selector Switch
1983	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1983	Chevrolet	S10	N/A	Selector Switch
1983	Chevrolet	S10	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1983	Chevrolet	S10 Blazer	N/A	Selector Switch
1983	Chevrolet	S10 Blazer	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1983	GMC	S15	N/A	Selector Switch
1983	GMC	S15	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1983	GMC	S15 Jimmy	N/A	Blower Motor Switch; Selector Switch
1983	Pontiac	Firebird	N/A	Selector Switch
1983	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1982	Chevrolet	Camaro	N/A	Selector Switch
1982	Chevrolet	Camaro	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1982	Chevrolet	S10	N/A	Selector Switch
1982	Chevrolet	S10	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1982	GMC	S15	N/A	Selector Switch
1982	GMC	S15	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1982	Pontiac	Firebird	N/A	Selector Switch
1982	Pontiac	Firebird	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
No rows match your filter.

Directly replaces or cross-references 8 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Four Seasons — 376391S14051571147160154501606877716068778A10239SW1456

Will it fit your vehicle?