27% off
New arrival

Thermo King Slim‑Line 3‑Wire Reefer Door Switch Kit, 401135


Sale price $17.99 Regular price $24.50
Shipping calculated at checkout.

Pickup available at Wall

Usually ready in 24 hours

Description

This Genuine OEM Thermo King Slim‑Line 3‑Wire Door Switch Kit (Part Number: 401135 / 40-1135) is an essential protection component designed to optimize cargo climate security across transport refrigeration units (TRUs). Engineered for intensive over-the-road hauling operations, this automatic safety switch instantly senses when a trailer or cargo bay door is opened and triggers the microprocessor to shut down or idle the refrigeration unit. By stopping the reefer fans from blowing during loading cycles, it blocks warm, humid ambient air from invading the food or medical containment zone. Swapping out a degraded or shorted door sensor prevents expensive fuel waste, prevents evaporator coil frost accumulation, and lowers the risk of catastrophic cargo temp alerts and costly emergency call-out service bills. [1, 2]
⭐ Key Features & Benefits
  • Automated Cold Chain Guard: Shuts down or idles fans instantly upon door openings to prevent temperature spikes and protect thermal integrity. [1]
  • Ultra-Rugged Slim‑Line Design: Built with a space-saving profile to easily fit trailer door frames without obstructing heavy pallet loading. [1, 2]
  • 3‑Wire Electrical Architecture: Offers clean, steady telemetry signals directly to modern Thermo King microprocessors for zero-delay operations. [1, 2]
  • Mitigates Fuel Waste: Eliminates unnecessary fuel burn from running high-velocity cooling systems while bay doors are wide open. [1]
  • Genuine OEM Reliability: Authentic original manufacturing standards ensure exceptional resistance to continuous physical impacts and severe highway vibrations. [1]
🔧 Uses / Applications
  • Commercial Reefer Cargo Protection: Installed on trailer rear and side doors to maintain precise temperatures for perishables or pharmaceuticals.
  • Multi-Temp System Regulation: Coordinates individual zone cooling loops inside multi-temperature trailer setups like the Spectrum series.
  • Fleet Preventive PM Cycles: Replaces broken mechanical contact switches or damaged wiring lines to eliminate persistent system alarm codes.
  • High-Margin Liquidator Surplus: Highly sought-after maintenance kit for heavy-duty truck centers, fleet managers, and commercial cargo equipment liquidators. [1, 2]
📊 Technical Specifications
Specification Detail
Part Type Slim-Line Door Switch Kit (3-Wire Configuration)
Position Trailer / Cargo Bay Door Frame Placement
Part Number 401135 / 40-1135 (Interchangeable with Kit 700307)
Material Heavy-Duty Chemical-Resistant Molded Composite & Hardware
Fitment Thermo King Advancer (A360/A400/A500), SB, SLXi, SLXe, & V-Series Units
Condition Brand New
Installation Direct-Fit Mechanical Mount with Included Magnet & Hardware
🔄 Cross‑Reference / Interchange Table
Manufacturer Equivalent Part Number
Thermo King (OEM) 401135 / 40-1135 / 40-1135A
Thermo King Kit Alternate 700307 / 700-307
Historical Interchange 04-7198 / 40-684 / 40-774 / 718365
Additional Notes Kit Includes: Full 3-wire contact switch block, matching magnet trigger assembly, and standard mounting screws.

Disclosure Policy

This product was acquired by Freeman Liquidators from a sale of merchandise subject to a commercial insurance loss. Freeman Liquidators is a secondary seller of products, is not affiliated with or sponsored by the manufacturer of the products and is not a manufacturer authorized seller of the products. Sale of this product by Freeman Liquidators is not subject to the policies of the manufacturer. Any warranty offered by the manufacturer is not available to you as the purchaser.

All products are NEVER USED but external packaging will have damage. Some items may be placed into other packaging to ensure safe shipping. All items are opened for inspection prior to shipment to ensure the best quality of products. Freeman Liquidators guarantees your satisfaction. If you are not completely satisfied with a purchased product, within 30 days from the date of purchase, return the product in its packaging and Freeman Liquidators will fully refund your money.

Delivery and Shipping

Shipping is automatically calculated at checkout.

In store pickup is sometimes the only option. These products are noted as such in our listings.

Some items have been set up so that they require a shipping quote.  Please fill out the appropriate form on the product's page and we will respond within 24-48 hours with a freight quote.  

What we ship is by best carrier, some products prepaid and others not, due to our large variances in product lines, physical sizes and weight.

At checkout you will be prompted for shipping alternatives dependent on these parameters. Products which fit standardized packaging may also have calculated shipping costs by weight and volume on our website.

In all cases our staff audits for the best shipping cost and if necessary will contact our customer with recommendations.

Freight/Palleted items that are not accepted by the recipient or are sent back to us due to undeliverable address may be refunded, but the return shipping fees will be deducted from the overall amount of refund.

All returned items are subject to a 10% handling fee.

Thermo King Slim‑Line 3‑Wire Reefer Door Switch Kit, 401135

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Discover
  • Google Pay
  • iDEAL Wero
  • Mastercard
  • PayPal
  • Satispay
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.