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Four Seasons 36668 HVAC Cut-Off SwitchOE Quality 60-Day Returns
Part #: ES2012S

Four Seasons 36668 HVAC Cut-Off Switch

Pressure Switch
66 vehicles fit this part
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Pressure Switch
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Four Seasons 36668 Pressure Switch Overview

Four Seasons 36668 is a system-mounted HVAC low cut-out pressure switch for A/C systems that use a 7/16 in. x 20 female thread connection and a round male 2-terminal connector. This black pressure switch meets or exceeds OEM requirements and is built for direct replacement service on select Buick, Cadillac, and Oldsmobile applications.

Use this Four Seasons Pressure Switch when you need a low pressure A/C cut-off switch for vehicles such as the Buick Riviera, Cadillac DeVille, and Oldsmobile Toronado. The Four Seasons 36668 is also cross-referenced to common aftermarket numbers for the same application.

Key Features

  • Low cut-out HVAC pressure switch for A/C system protection
  • System-mounted design for direct installation on the HVAC system
  • Black housing with round male connector and 2 terminals
  • Female fitting thread size: 7/16 in. x 20
  • Meets or exceeds OEM specifications
  • Four Seasons Pressure Switch line for replacement HVAC service

Detailed Product Description

Four Seasons 36668 is a pressure-operated HVAC cut-off switch used to monitor low refrigerant pressure and signal the A/C system when pressure drops below the operating threshold. Its open contact configuration, round connector shape, and system-mounted layout make it a direct-fit replacement for select GM vehicles that require a low pressure A/C cut-off switch. This part number is commonly searched as Four Seasons 36668 pressure switch, HVAC cut-off switch 36668, and low pressure A/C switch for Buick Riviera, Cadillac DeVille, and Oldsmobile Toronado applications.

This part cross-references Hayden 5066 and UAC SW1135C for the same application.

What It Helps Address

  • A/C compressor cycling caused by low refrigerant pressure
  • HVAC system shutdown from a failed low pressure cut-off switch
  • Intermittent A/C operation related to pressure switch contact issues
  • Incorrect pressure signal to the HVAC control circuit
  • Replacement needs on select Buick, Cadillac, and Oldsmobile A/C systems

Installation Notes and Tips

Install the switch on the HVAC system at the original mounting location and verify the connector style, thread size, and terminal count before installation. Confirm the vehicle uses a low pressure A/C cut-off switch with a 7/16 in. x 20 female fitting and round male connector. For fitment verification, this part is listed for 1986-1993 Buick Riviera, 1987-1993 Cadillac DeVille, and 1986-1992 Oldsmobile Toronado, along with additional Cadillac and Buick applications in the same model years.

  • Fits 1986-1993 Buick Riviera, N/A
  • Fits 1987-1993 Cadillac DeVille, N/A
  • Fits 1986-1992 Oldsmobile Toronado, N/A
  • Fits 1986-1993 Cadillac Eldorado, N/A
  • Fits 1986-1993 Cadillac Fleetwood, N/A
  • Fits 1986-1993 Cadillac Seville, N/A
  • Fits 1987-1992 Cadillac Brougham, N/A
  • Fits 1988-1991 Buick Reatta, N/A
  • Fits 1989-1993 Cadillac Commercial Chassis, N/A

Quality Assurance

Four Seasons manufactures this pressure switch to meet or exceed OEM specifications for HVAC service applications. The Four Seasons Pressure Switch line is built for replacement use in systems that require accurate low pressure cut-off control.

BrandMoog
Part NumberES2012S
PositionPressure Switch
Length5.5

This part fits 66 vehicles. Search below:

YearMakeModelSubmodelPositionNotes
1993BuickRivieraN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1993CadillacCommercial ChassisBroughamN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1993CadillacDeVilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1993CadillacEldoradoN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1993CadillacFleetwoodN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1993CadillacSevilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1992BuickRivieraN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1992CadillacBroughamN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1992CadillacCommercial ChassisBroughamN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1992CadillacDeVilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1992CadillacEldoradoN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1992CadillacFleetwoodN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1992CadillacSevilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1992OldsmobileToronadoN/ALow Pressure A/C System Mounted Liquid Line - HVAC Cut-Off Switch; Pressure Switch
1991BuickReattaN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1991BuickRivieraN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1991CadillacBroughamN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1991CadillacDeVilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1991CadillacEldoradoN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1991CadillacFleetwoodN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1991CadillacSevilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1991OldsmobileToronadoN/ALow Pressure A/C System Mounted Liquid Line - HVAC Cut-Off Switch; Pressure Switch
1990BuickReattaN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1990BuickRivieraN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1990CadillacBroughamN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1990CadillacCommercial ChassisN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1990CadillacDeVilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1990CadillacEldoradoN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1990CadillacFleetwoodN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1990CadillacSevilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1990OldsmobileToronadoN/ALow Pressure A/C System Mounted Liquid Line - HVAC Cut-Off Switch; Pressure Switch
1989BuickReattaN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989BuickRivieraN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989CadillacBroughamN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989CadillacCommercial ChassisN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989CadillacDeVilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989CadillacEldoradoN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989CadillacFleetwoodN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989CadillacFleetwoodBaseN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989CadillacFleetwoodd'EleganceN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989CadillacFleetwood60 SpecialN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989CadillacFleetwoodBrougham Commercial ChassisN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989CadillacSevilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1989OldsmobileToronadoN/ALow Pressure A/C System Mounted Liquid Line - HVAC Cut-Off Switch; Pressure Switch
1988BuickReattaN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1988BuickRivieraN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1988CadillacBroughamN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1988CadillacDeVilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1988CadillacEldoradoN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1988CadillacFleetwoodN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1988CadillacSevilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1988OldsmobileToronadoN/ALow Pressure A/C System Mounted Liquid Line - HVAC Cut-Off Switch; Pressure Switch
1987BuickRivieraN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1987CadillacBroughamN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1987CadillacDeVilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1987CadillacEldoradoN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1987CadillacFleetwoodN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1987CadillacSevilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1987OldsmobileToronadoN/ALow Pressure A/C System Mounted Liquid Line - HVAC Cut-Off Switch; Pressure Switch
1986BuickRivieraN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1986CadillacEldoradoN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1986CadillacFleetwoodBaseN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1986CadillacFleetwood75N/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1986CadillacFleetwood75 FormalN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1986CadillacSevilleN/AMount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
1986OldsmobileToronadoN/ALow Pressure A/C System Mounted Liquid Line - HVAC Cut-Off 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:

03-8890226023006269-1123310258388902425-101145848145A60115203760052126122AC531-2896C2Z3281BAS81015C6TZ-3281AE-6226-TUE5TZ-3281BE6226E7TZ-3281AE9TZ-3281AES2012SF1TZ-3281AJSA1025MES2012SR230222S2012ZZL1-32-366

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

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