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OE Quality
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NGKPart #: 7100
Four Seasons 37577 HVAC Blower Control Switch - Front
142 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Selector Switch
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Not what you need? See all HVAC Blower Control Switch options
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.
| Brand | NGK |
|---|---|
| Part Number | 7100 |
| Position | Selector Switch |
| 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 |
This part fits 142 vehicles. Search below:
| 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 |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
183318343644286719672167257100AP5224AP5405AP5405DP2FGR8LQP0FR7LPP30XRC12LC4RC12PMC4
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.