Four Seasons 37577 HVAC Blower Control Switch - Front

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Selector Switch

Four Seasons 37577 HVAC Blower Control Switch - Front

Brand	Four Seasons 7100
Center Electrode Core Material	Copper
Center Electrode Tip Material	Platinum
Electrical Terminal Type	Non-Removable Nut
Ground Configuration	Standard
Ground Electrode Core Material	Nickel
Ground Electrode Quantity	1
Ground Electrode Tip Design	Trapezoid
Hex Size	5/8
Insulator Height	50.50
Manufacturer Heat Range	6
Part Number	ZFR6FGP
Pre-Gap Size	.040
Reach	.75
Resistance	5000
Seat Type	Flat
Stock Number	7100
Thread Diameter	14.00
Product line	Selector Switch
Fits	—142 vehicles

OE direct replacement. Meets OEM requirements for dependable HVAC blower control.

Selector switch. Controls blower speed with a simple, rectangular connector design.

Five terminals. Male connector layout supports a straightforward electrical connection.

Cross-references Four Seasons 37577, 155652 and 16230771 for the same application. See all 7.

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HVAC Blower Control Switch Overview

The Four Seasons Selector Switch 37577 is an HVAC blower control switch built for direct replacement in select Jeep, Chevrolet, Dodge, GMC, Oldsmobile, and Isuzu applications. It is a male, rectangular connector design with 5 terminals and meets or exceeds OEM requirements for the listed vehicles.

Use this selector switch when the blower speed control no longer responds correctly or the HVAC system needs a replacement blower switch for restored cabin airflow control. Four Seasons 37577 is part of the Selector Switch line, focused on replacement HVAC electrical components for common service applications.

Key Features

HVAC blower control switch / selector switch for listed applications
Male rectangular connector for direct-fit electrical connection
5-terminal design
Meets or exceeds OEM specifications
Four Seasons part number 37577
Cross-references ACD155652 and SW1462 for the same application

Application Details

Compatible With 1997-2004 Jeep TJ and 1997-2004 Jeep Wrangler as a selector switch. It also fits 1998-2003 Dodge Ram 3500 Van, 1999-2003 Dodge Ram 2500 Van, 1998-1998 Dodge B1500, B2500, and B3500, plus select Chevrolet Blazer, Chevrolet S10, GMC Jimmy, GMC Sonoma, Oldsmobile Bravada, and Isuzu Hombre models listed in the fitment data. Four Seasons 37577 is a practical replacement for HVAC blower control service on vehicles with AC, heater blower, auxiliary blower, or ATC-specific configurations where noted.

Common Problems This Part Can Address

Blower fan speeds that do not change with the dash control
Intermittent HVAC blower operation
No cabin airflow from the heater or A/C system
Worn or damaged blower selector switch contacts
Electrical connection issues at the HVAC control panel

Installation Notes

Verify the vehicle year, make, model, and HVAC configuration before ordering. Fitment varies by trim and equipment, including AC, ATC, auxiliary blower, digital instrument panel, and federal emissions notes on certain applications. Confirm the connector shape, terminal count, and switch style against the original part before installation. Fits 1997-2004 Jeep Wrangler, N/A; Fits 1997-2004 Jeep TJ, N/A; Fits 2002-2003 Chevrolet Blazer, Front; Fits 1998-2003 Dodge Ram 3500 Van, N/A; Fits 1999-2003 Dodge Ram 2500 Van, N/A; Fits 1998-1999 Isuzu Hombre, N/A.

Quality Assurance

Four Seasons lists this selector switch as meeting or exceeding OEM specifications for the stated applications. Part number 37577 is engineered as an OE-style HVAC replacement component for service use.

This part fits 142 vehicles

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

Year	Make	Model	Liters	Cylinders	Position	Notes
2004	Jeep	TJ	—	—	N/A	Selector Switch
2004	Jeep	TJ	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2004	Jeep	Wrangler	—	—	N/A	Selector Switch
2004	Jeep	Wrangler	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003	Chevrolet	Blazer	—	—	Front	Blower Motor Switch; w/ AC and Heater Blower; Selector Switch
2003	Chevrolet	Blazer	—	—	Front	w/ AC and Heater Blower; Selector Switch
2003	Dodge	Ram 1500 Van	3.9L	V6	N/A	Blower Motor Switch; Module; Selector Switch
2003	Dodge	Ram 1500 Van	3.9L	V6	N/A	Module; Selector Switch
2003	Dodge	Ram 1500 Van	5.2L	V8	N/A	Selector Switch
2003	Dodge	Ram 1500 Van	5.2L	V8	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003	Dodge	Ram 1500 Van	5.9L	V8	N/A	Selector Switch
2003	Dodge	Ram 1500 Van	5.9L	V8	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003	Dodge	Ram 2500 Van	—	—	N/A	Selector Switch
2003	Dodge	Ram 2500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003	Dodge	Ram 3500 Van	—	—	N/A	Selector Switch
2003	Dodge	Ram 3500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003	GMC	Sonoma	—	—	N/A	Selector Switch
2003	GMC	Sonoma	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003	Jeep	TJ	—	—	N/A	Selector Switch
2003	Jeep	TJ	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003	Jeep	Wrangler	—	—	N/A	Selector Switch
2003	Jeep	Wrangler	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003	Oldsmobile	Bravada	—	—	N/A	Selector Switch
2003	Oldsmobile	Bravada	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002	Chevrolet	Blazer	—	—	Front	Blower Motor Switch; w/ AC and Heater Blower; Selector Switch
2002	Chevrolet	Blazer	—	—	Front	w/ AC and Heater Blower; Selector Switch
2002	Chevrolet	S10	—	—	N/A	Selector Switch
2002	Chevrolet	S10	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002	Dodge	Ram 1500 Van	—	—	N/A	Selector Switch
2002	Dodge	Ram 1500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002	Dodge	Ram 2500 Van	—	—	N/A	Selector Switch
2002	Dodge	Ram 2500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002	Dodge	Ram 3500 Van	—	—	N/A	Selector Switch
2002	Dodge	Ram 3500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002	GMC	Sonoma	—	—	N/A	Selector Switch
2002	GMC	Sonoma	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002	Jeep	TJ	—	—	N/A	Selector Switch
2002	Jeep	TJ	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002	Jeep	Wrangler	—	—	N/A	Selector Switch
2002	Jeep	Wrangler	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002	Oldsmobile	Bravada	—	—	N/A	Selector Switch
2002	Oldsmobile	Bravada	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2001	Chevrolet	Blazer	—	—	Front	Blower Motor Switch; Module; Selector Switch
2001	Chevrolet	Blazer	—	—	Front	Module; Selector Switch
2001	Chevrolet	S10	—	—	N/A	Blower Motor Switch; Module; Selector Switch
2001	Chevrolet	S10	—	—	N/A	Module; Selector Switch
2001	Dodge	Ram 1500 Van	—	—	N/A	Blower Motor Switch; Module; Selector Switch
2001	Dodge	Ram 1500 Van	—	—	N/A	Module; Selector Switch
2001	Dodge	Ram 2500 Van	—	—	N/A	Selector Switch
2001	Dodge	Ram 2500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2001	Dodge	Ram 3500 Van	—	—	N/A	Selector Switch
2001	Dodge	Ram 3500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2001	GMC	Jimmy	—	—	N/A	Blower Motor Switch; w/o ATC (Automatic Temperature Control); Selector Switch
2001	GMC	Jimmy	—	—	N/A	ATC relay connector incompatible with HVAC blower motor resistor harness.; Selector Switch
2001	GMC	Sonoma	—	—	N/A	Selector Switch
2001	GMC	Sonoma	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2001	Jeep	TJ	—	—	N/A	Selector Switch
2001	Jeep	TJ	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2001	Jeep	Wrangler	—	—	N/A	Selector Switch
2001	Jeep	Wrangler	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2001	Oldsmobile	Bravada	—	—	N/A	Selector Switch
2001	Oldsmobile	Bravada	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000	Chevrolet	Blazer	—	—	Front	Blower Motor Switch; w/ Auxiliary Blower; Selector Switch
2000	Chevrolet	Blazer	—	—	Front	w/ Auxiliary Blower; Selector Switch
2000	Chevrolet	S10	—	—	N/A	Selector Switch
2000	Chevrolet	S10	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000	Dodge	Ram 1500 Van	—	—	N/A	Blower Motor Switch; Module; Selector Switch
2000	Dodge	Ram 1500 Van	—	—	N/A	Module; Selector Switch
2000	Dodge	Ram 2500 Van	—	—	N/A	Selector Switch
2000	Dodge	Ram 2500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000	Dodge	Ram 3500 Van	—	—	N/A	Selector Switch
2000	Dodge	Ram 3500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000	GMC	Jimmy	—	—	N/A	Selector Switch
2000	GMC	Jimmy	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000	GMC	Sonoma	—	—	N/A	Blower Control Switch; with Air Conditioning; Selector Switch
2000	GMC	Sonoma	—	—	N/A	Compatible with vehicles equipped with air conditioning.; Selector Switch
2000	Jeep	TJ	—	—	N/A	Selector Switch
2000	Jeep	TJ	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000	Jeep	Wrangler	—	—	N/A	Selector Switch
2000	Jeep	Wrangler	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000	Oldsmobile	Bravada	—	—	N/A	Blower Motor Switch; Federal Emissions; Selector Switch
2000	Oldsmobile	Bravada	—	—	N/A	Federal Emissions; Selector Switch
1999	Chevrolet	Blazer	—	—	Front	Blower Motor Switch; Module; Selector Switch
1999	Chevrolet	Blazer	—	—	Front	Module; Selector Switch
1999	Chevrolet	S10	—	—	N/A	Selector Switch
1999	Chevrolet	S10	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	Dodge	Ram 1500 Van	3.9L	V6	N/A	Blower Motor Switch; Module; Selector Switch
1999	Dodge	Ram 1500 Van	3.9L	V6	N/A	Module; Selector Switch
1999	Dodge	Ram 1500 Van	5.2L	V8	N/A	Selector Switch
1999	Dodge	Ram 1500 Van	5.2L	V8	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	Dodge	Ram 1500 Van	5.9L	V8	N/A	Selector Switch
1999	Dodge	Ram 1500 Van	5.9L	V8	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	Dodge	Ram 2500 Van	—	—	N/A	Selector Switch
1999	Dodge	Ram 2500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	Dodge	Ram 3500 Van	—	—	N/A	Selector Switch
1999	Dodge	Ram 3500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	GMC	Jimmy	—	—	N/A	Selector Switch
1999	GMC	Jimmy	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	GMC	Sonoma	—	—	N/A	Selector Switch
1999	GMC	Sonoma	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	Isuzu	Hombre	—	—	N/A	Selector Switch
1999	Isuzu	Hombre	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	Jeep	TJ	—	—	N/A	Selector Switch
1999	Jeep	TJ	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	Jeep	Wrangler	—	—	N/A	Selector Switch
1999	Jeep	Wrangler	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	Oldsmobile	Bravada	—	—	N/A	Blower Motor Switch with Automatic Temperature Control (ATC); Selector Switch
1999	Oldsmobile	Bravada	—	—	N/A	Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Selector Switch
1998	Chevrolet	Blazer	—	—	Front	Blower Motor Switch; w/ AC and Heater Blower; Selector Switch
1998	Chevrolet	Blazer	—	—	Front	w/ AC and Heater Blower; Selector Switch
1998	Chevrolet	S10	—	—	N/A	Selector Switch
1998	Chevrolet	S10	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	Dodge	B1500	—	—	N/A	Selector Switch
1998	Dodge	B1500	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	Dodge	B2500	—	—	N/A	Selector Switch
1998	Dodge	B2500	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	Dodge	B3500	—	—	N/A	Selector Switch
1998	Dodge	B3500	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	Dodge	Ram 1500 Van	—	—	N/A	Blower Control Switch; with Air Conditioning; Selector Switch
1998	Dodge	Ram 1500 Van	—	—	N/A	Compatible with vehicles equipped with air conditioning.; Selector Switch
1998	Dodge	Ram 2500 Van	—	—	N/A	Blower Motor Switch with Automatic Temperature Control (ATC); Selector Switch
1998	Dodge	Ram 2500 Van	—	—	N/A	Compatible with HVAC systems featuring Automatic Temperature Control (ATC).; Selector Switch
1998	Dodge	Ram 3500 Van	—	—	N/A	Selector Switch
1998	Dodge	Ram 3500 Van	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	GMC	Jimmy	—	—	N/A	Blower Motor Switch; w/ Digital Instrument Panel; Selector Switch
1998	GMC	Jimmy	—	—	N/A	w/ Digital Instrument Panel; Selector Switch
1998	GMC	Sonoma	—	—	N/A	Selector Switch
1998	GMC	Sonoma	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	Isuzu	Hombre	4.3L	V6	N/A	Blower Control Switch; with Air Conditioning; Selector Switch
1998	Isuzu	Hombre	4.3L	V6	N/A	Compatible with vehicles equipped with air conditioning.; Selector Switch
1998	Isuzu	Hombre	2.2L	L4	N/A	Selector Switch
1998	Isuzu	Hombre	2.2L	L4	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	Jeep	TJ	—	—	N/A	Selector Switch
1998	Jeep	TJ	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	Jeep	Wrangler	—	—	N/A	Selector Switch
1998	Jeep	Wrangler	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	Oldsmobile	Bravada	—	—	N/A	Selector Switch
1998	Oldsmobile	Bravada	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1997	Jeep	TJ	—	—	N/A	Selector Switch
1997	Jeep	TJ	—	—	N/A	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1997	Jeep	Wrangler	—	—	N/A	Selector Switch
1997	Jeep	Wrangler	—	—	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 7 part numbers

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

Four Seasons — 3757715565216230771A10177ACD155652SW1462SW2252

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