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Temperature sensor of the forced air

Brand: Thermo King
Product Code: 400974

Used: 96.00$

New: 360.00$

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We are the company «RefBelholod»
We have been working with refrigerators
CARRIER & THERMO KING for more than 10 years.


We have a large warehouse of secondary spare parts for refrigerators. Excellent quality of spare parts, all spare parts are inspected!


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To place an order, contact us in any way convenient for you. Send us a link to the spare part or its article number.


✅ Order delivery

If the spare part is in our warehouse in Minsk, we will try to quickly deliver it to any city in the CIS where there is SDEK.

If the spare parts are not in the warehouse in Minsk, we will try to find them in the UAE and send them for you, and we will also deliver from the warehouse in Moscow to any city where there is SDEK.

Discharge / Supply Air Temperature Sensor Thermo King Part 40-0974 / 41-4022

The Discharge Air Temperature Sensor Thermo King 40-0974 (Supply Air Sensor) is a highly responsive thermistor designed to continuously monitor the temperature of the air stream exiting the evaporator coil and entering the cargo space.

This sensor is absolutely critical for the safe transportation of temperature-sensitive freight, such as fresh produce, chilled meats, and pharmaceuticals. By providing real-time data to the microprocessor, the controller can actively modulate cooling capacity to prevent "top-freezing" of the cargo loaded near the evaporator chute. A failed discharge air sensor compromises the entire climate control system, risking catastrophic cargo loss. Replacing a faulty sensor immediately ensures strict temperature compliance and protects valuable loads.

This premium replacement component is listed under the primary catalog number 40-0974 and officially supersedes a massive history of previous sensor versions, including 41-4022, 40-0871, and 41-2649.

Technical Information:

  • Hardware Type: Discharge Air Temperature Sensor / Supply Air Probe
  • Primary Function: Evaporator airflow temperature monitoring; Top-freeze protection
  • Part Catalog & Cross References:
    Thermo King: 40-0974, 400974, 400-974, 40-974;
    41-4022, 414022, 414-022;
    40-0871, 400871, 400-871, 40-871;
    41-2649, 412649, 412-649;
    Factory Code: 5024D629.

Unit Compatibility:
Engineered for universal deployment across a vast range of Thermo King equipment:
SL / SLX Series: SL-100(e) to SL-400(e), SL TCI, SLX-100, SLX-200, SLX-400;
SB / SMX / Super Series: SB-100 to SB-400, SB-III (SR, Whisper), SB Classic, SMX, SMX-II (SR), Super-II;
Spectrum Series: Spectrum SB, DE, Super-II TCI, TS, TS-500 Spectrum;
TS / MD / RD Series: TS-200 to TS-600, MD-200, MD-MT, MD-11 SR, RD-II SR, UTS;
Marine & Container: CSR 40, CRR (20, 40), CF-II, LRV-8T, LRV-10, RAC-4, TA-1100, XDS SR, and more.

Catalog Number:

Thermo King: 40-0974, 41-4022, 40-0871

Delivery and Warranty:
Fast shipping options across regions. 1-month comprehensive operational warranty included. Distributed inside secure packaging to protect the sensor probe.

Is your microprocessor showing a discharge air sensor open circuit? Don't risk freezing your customer's freight! Restore precise climate control with the genuine 40-0974 sensor today.


Product Description: Buy high-precision discharge/supply air temperature sensor Thermo King 40-0974 (41-4022, 40-0871) for SL, SLX, SB, TS, SMX, and Marine units. Fast shipping.

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Price information is updated automatically, every night!


The price during the day can change several times, in such cases it is unloaded manually.

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We try to ensure that the information is always up-to-date.

We will pack it beautifully and provide it for you around the clock!

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Tags: Sensors / Thermo King SLX / SLXe / SLXi