Advance Truck Parts 3521729C1 Navistar High Pressure A/C Switch (Normally Closed)
Brand: Advance Truck Parts
SKU: 3521729C1
Availability: In Stock | Ready to Ship
Product Overview
Keep your commercial truck’s climate control system running reliably with the ATP 3521729C1 High-Pressure A/C Switch. Designed specifically for heavy-duty International / Navistar HVAC applications, this 2-pin, normally closed (N.C.) binary switch monitors R134a system pressure. It protects your A/C compressor from overpressure conditions by opening at 275 PSI and resetting/closing at 225 PSI.
Key Benefits
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Essential System Protection: Prevents catastrophic HVAC compressor failure by interrupting operation when head pressure exceeds safe operating parameters.
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Exact Fit OEM Replacement: Form-fit-function replacement built to heavy-duty fleet and vocational standards.
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Durable Construction: Built with heavy-duty metal housing and high-grade electrical contacts to withstand extreme under-hood heat and vibration.
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Fast Turnaround: Order today with Same Day Shipping available.
Technical Specifications
| Property |
Specification |
| Circuit Type |
Normally Closed (N.C.) |
| Operating Pressures |
Opens: 275 PSI |
| Connector |
2-Pin Male |
| Thread Size |
Female M10 - 1.25 Metric |
| Refrigerant Compatibility |
R134a |
| Application |
International / Navistar Heavy Duty Trucks (e.g., 9000 Series) |
| Matching Harness / Pigtail |
W094114 |
Cross Reference & OEM Part Numbers
This unit replaces the following part numbers:
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Navistar / International: 3521729C1, 3521729-C1, 2601236
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Dorman: 917-1114
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MEI / Air Source: 1489, 11-0829
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Truck Air / PTAC: PTAC1489, 14-5555
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Sensata: 40PS15-3
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Other References: 850-8406, 29-30742, 128174, 71R6235
Note: Please verify your original switch's thread size and OEM part number prior to purchasing to ensure exact fitment.
For pigtail use W094114
