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Four Seasons 36664 A/C Clutch Cycle SwitchOE Quality 60-Day Returns
Part #: 36664

Four Seasons 36664 A/C Clutch Cycle Switch

Pressure Switch
148 vehicles fit this part
Select your vehicle to confirm fitment
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Pressure Switch
Fitment: Buick, Chevrolet, GMC, Oldsmobile, and Pontiac, Blazer, C1500, C1500 Suburban, C2500, C2500 Suburban, C35, C3500, Jimmy, K1500, K1500 Suburban, K2500, K2500 Suburban, K3500, Lumina APV, R1500 Suburban, R2500, R2500 Suburban, R3500, Regal, Silhouette, Trans Sport, V1500 Suburban, V2500 Suburban, V3500, and Yukon
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Four Seasons 36664 A/C Clutch Cycle Switch

The Four Seasons Pressure Switch line includes this A/C clutch cycle switch for system-mounted HVAC control. Part number 36664 is a 12-volt, two-terminal pressure switch with a round connector, black housing, and Weather Pack protection for service in demanding underhood conditions.

Key Features

  • Four Seasons Pressure Switch line, part number 36664
  • A/C clutch cycle switch with system mount design
  • 12-volt operation with 2 male pin terminals
  • Round connector shape and female 7/16 in. x 20 fitting thread
  • Black plastic and metal construction
  • Weather Pack sealed connection
  • Meets or exceeds OEM requirements
  • Cycling style with low-off at 30 psi and low-on at 49 psi

Product Details

This pressure switch is built for R12 refrigerant air conditioning compressor cut-out applications and is listed across a wide range of GM trucks and SUVs, including Chevrolet Blazer, C1500, K1500, and GMC Jimmy, Yukon, and related Suburban models. It is also referenced for Buick Regal and select 1992 minivan applications such as Chevrolet Lumina APV, Oldsmobile Silhouette, and Pontiac Trans Sport. The Four Seasons 36664 is a direct-fit style HVAC switch for vehicles that require a cycling pressure control point in the A/C system.

This part cross-references UAC SW9938C and Hayden 5039 for the same application.

Common Issues This Part Addresses

  • A/C compressor cycling too frequently or not cycling at the correct pressure
  • Compressor cut-out behavior caused by a failed pressure switch
  • Loss of cabin cooling from incorrect system pressure signal
  • Intermittent A/C operation related to worn switch contacts or connector issues
  • HVAC control faults on R12 refrigerant systems

Installation Notes and Tips

Verify the fitting thread size, connector shape, terminal style, and pressure settings before installation. This switch uses a female 7/16 in. x 20 thread, a round connector, and male pin terminals, so matching the original HVAC connector and mounting location is important. Confirm refrigerant system requirements and vehicle application details for Chevrolet C1500, GMC K2500, and similar GM platforms before replacing the original part.

Quality Assurance

Four Seasons lists this pressure switch as meeting or exceeding OEM requirements. The 36664 part number is supported by multiple interchange references, which helps confirm application matching for service work on 1989-1993 Chevrolet and GMC trucks and SUVs.

BrandFour Seasons
Part Number36664
PositionPressure Switch
ColorBlack
Connector ShapeRound
DescriptionSwitch-pressure /system mount
Fitting GenderFemale
Fitting Thread Size7/16 in. x 20
Item Included A Desc24650
Item Included A Qty.1
MaterialPlastic / metal
Meets / Exceeds OEM?Yes
Mnt Sys LocSystem mount
Number of Terminals2
Open (at 0 psi.)?Yes
Operate Psi Low Off30
Operate Psi Low On49
StyleCycling
Terminal GenderMale
Terminal TypePin
TypePressure
Voltage12
Weather Pack?Yes

This part fits 148 vehicles. Search below:

YearMakeModelBody TypeLitersCylindersPositionNotes
1993BuickRegalSedan3.8LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1993BuickRegalCoupe3.8LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1993BuickRegalSedan3.1LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1993BuickRegalCoupe3.1LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1993ChevroletBlazerN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletC1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletC1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletC2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletC2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletC35N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletC3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletK1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletK1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletK2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletK2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993ChevroletK3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCC1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCC1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCC2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCC2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCC3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCK1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCK1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCK2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCK2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCK3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1993GMCYukonN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992BuickRegalSedan3.8LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1992BuickRegalCoupe3.8LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1992BuickRegalSedan3.1LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1992BuickRegalCoupe3.1LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1992ChevroletBlazerN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletC1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletC1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletC2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletC2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletC35N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletC3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletK1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletK1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletK2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletK2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletK3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992ChevroletLumina APVN/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1992GMCC1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992GMCC1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992GMCC2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992GMCC2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992GMCC3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992GMCK1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992GMCK1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992GMCK2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992GMCK2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992GMCK3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992GMCYukonN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1992OldsmobileSilhouetteN/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1992PontiacTrans SportN/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1991BuickRegalSedan3.8LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1991BuickRegalCoupe3.8LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1991BuickRegalSedan3.1LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1991BuickRegalCoupe3.1LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1991ChevroletBlazerN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletC1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletC2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletC35N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletC3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletK1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletK2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletK3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletR1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletR2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletR3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletV1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletV2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991ChevroletV3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCC1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCC2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCC3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCJimmyN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCK1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCK2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCK3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCR1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCR2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCR3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCV1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCV2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1991GMCV3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990BuickRegalSedan3.8LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1990BuickRegalCoupe3.8LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1990BuickRegalSedan3.1LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1990BuickRegalCoupe3.1LV6N/AFitment Note: Compatible with various models and years, verify compatibility with your vehicle before purchasing.; Pressure Switch
1990ChevroletBlazerN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletC1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletC2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletC35N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletC3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletK1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletK2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletK3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletR1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletR2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletR3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletV1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletV2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990ChevroletV3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCC1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCC2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCC3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCJimmyN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCK1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCK2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCK3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCR1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCR2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCR3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCV1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCV2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1990GMCV3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletBlazerN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletC1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletC2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletC35N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletC3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletK1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletK2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletK3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletR1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletR2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletR2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletR3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletV1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletV2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989ChevroletV3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCC1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCC2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCC3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCJimmyN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCK1500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCK2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCK3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCR1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCR2500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCR2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCR3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCV1500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCV2500 SuburbanN/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure Switch
1989GMCV3500N/ACompatible with R12 refrigerant air conditioning compressor cut-out switch.; Pressure 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:

01478028110215110216111209081112091111136664V1413142114231424152628152639152647171143117115912074142074392074682090820911211585212585221000222816229902229300333096605320533990366644040935039524514365245143752451440524578535245785457521701816707468711066713666485202A8385AC8341ACD152647B404093E807322HS585MT0204SW1132SW2647SW2647CSW9938C

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

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