Thermo King Wireless Door Switch CargoLink Compatible 401143

$30.67

Built for Performance: The Thermo King Wireless Door Switch 401143 integrates with a Thermo King refrigeration system to automatically manage unit runtime during deliveries, supporting precise temperature control and fuel-efficient cooling for refrigerated fleets.

West Texas Thermo King, a certified Thermo King dealership, provides this Wireless Door Switch 401143 to reduce unnecessary runtime, improve cargo protection, and simplify service on reefer trailers operating across Amarillo, Lubbock, Odessa, the Permian Basin, and throughout West Texas.

Automatic Door Detection – Stops and restarts the refrigeration unit based on door position to minimize fuel consumption and wear during loading and unloading.
Wireless Convenience – Eliminates additional wiring runs and simplifies retrofit installations for transport refrigeration fleets.
Broad Temperature Tolerance – Engineered to operate reliably in extreme refrigerated and ambient conditions, maintaining consistent temperature control for cargo integrity.
Thermo King Compatibility – Pairs with Thermo King CargoLink and common control systems to support fleet telematics and event logging.
Compact, Durable Design – Low-profile sensor and magnet installation fits swing-out and roll-up doors while withstanding routine dock activity when mounted with appropriate protection.
Security & Quiet Deliveries – Supports door-event logging and ensures reduced refrigeration noise during loading for safer, less disruptive deliveries.

Product Details

Part Number	401143
Product Name	Thermo King Wireless Door Switch 401143
Typical Frequency	315 MHz
Operating Temperature Range	-40°F to +170°F
Typical Transmission Range	Up to 120 ft (subject to trailer configuration)
Recommended Mounting Gap	Maximum 0.75 in (19 mm) between sensor and magnet
Compatibility	Thermo King CargoLink and common Thermo King control systems (Precedent S-610M, S-610DE, Smart Reefer SR-4 compatible environments)
Application	Reefer trailers, refrigerated truck bodies, transport refrigeration delivery operations

Efficiency & Sustainability

The Wireless Door Switch 401143 improves fleet efficiency by reducing unnecessary runtime and lowering fuel use during frequent door openings. Integration with CargoLink and smart telematics supports data-driven maintenance and temperature-control strategies. This approach aligns with modern sustainability goals for transport refrigeration and complements CARB Evergreen efforts where applicable.

Installation & Maintenance Tips

Mount the sensor and magnet parallel with a gap no greater than 0.75 inches (19 mm). Pair the switch with the trailer coordinator or CargoLink module in the control box, confirming LED pairing signals. Protect exposed installations from forklift impact and inspect the sensor during scheduled maintenance intervals for secure mounting and reliable signaling.

Real-World Applications

The Wireless Door Switch 401143 is ideal for reefer trailers and refrigerated truck bodies that require automated door control to preserve cold chain integrity during deliveries. Fleets operating Smart Reefer SR-4 or Precedent-series equipment benefit from simplified installs and reduced idle time when doors remain open at docks.

Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.

View all Thermo King Parts

Backed by Thermo King’s engineering and supported by certified technicians at West Texas Thermo King, this component delivers lasting reliability and uptime assurance for fleet operations.

For product verification or service assistance, call (806) 376-5837.

For current warranty eligibility or OEM replacement coverage, contact us for warranty information: contact.

Frequently Asked Questions

Q: Is the Wireless Door Switch 401143 compatible with Thermo King refrigeration units?
A: Yes. The switch pairs with Thermo King control systems such as CargoLink and integrates into common Precedent and Smart Reefer environments for automated door-event control.

Q: How does the wireless door switch improve fleet efficiency?
A: It reduces unnecessary runtime and fuel use by stopping the refrigeration unit when the door opens and restarting when the door closes, improving temperature control and service intervals.

Q: What installation considerations improve longevity?
A: Mount the sensor and magnet within the recommended 0.75 in gap, secure the antenna and coordinator module in the control box, and protect externally mounted sensors from dock and forklift impact.

Q: What is the expected transmission range?
A: Typical transmission range is up to 120 feet, though actual range depends on trailer configuration and interference within the transport refrigeration environment.

Related Resources

Ask about fleet-wide parts programs through West Texas Thermo King.

Produced by a certified Thermo King dealership, West Texas Thermo King | a Division of PEAK Industrial. Servicing fleets across Amarillo, Lubbock, and Odessa.

Automatic Door Detection – Stops and restarts the refrigeration unit based on door position to minimize fuel consumption and wear during loading and unloading.
Wireless Convenience – Eliminates additional wiring runs and simplifies retrofit installations for transport refrigeration fleets.
Broad Temperature Tolerance – Engineered to operate reliably in extreme refrigerated and ambient conditions, maintaining consistent temperature control for cargo integrity.
Thermo King Compatibility – Pairs with Thermo King CargoLink and common control systems to support fleet telematics and event logging.
Compact, Durable Design – Low-profile sensor and magnet installation fits swing-out and roll-up doors while withstanding routine dock activity when mounted with appropriate protection.
Security & Quiet Deliveries – Supports door-event logging and ensures reduced refrigeration noise during loading for safer, less disruptive deliveries.