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Trane / American Standard SWT01275 Thermal Limit Switch - 135°F Open / 105°F Close (3" Insert)

Trane / American Standard SWT01275 Thermal Limit Switch - 135°F Open / 105°F Close (3" Insert)

Low stock: 4 left

Regular price $50.36 USD
Regular price Sale price $50.36 USD
Sale Sold out
Shipping calculated at checkout.

Quick Feature Highlights

  • Genuine Trane / American Standard OEM

  • Automatic Reset Functionality

  • Precision 135°F Trip Threshold

  • Durable 3" Insert Design

  • Standard 120V / 24V Control Compatibility

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Specifications

Product Details & Specification

  • Part Type: Thermal Limit Switch
  • Brand: Trane / American Standard (Therm-O-Disc)
  • Opening Temp: 135°F (Open on Temperature Rise)
  • Closing Temp: 105°F (Close on Temperature Drop)
  • Circuit: Normally Closed (N/C), SPST
  • Insert Length: 3 Inches
  • Voltage/Current: 120V AC (5.8 FLA / 34.8 LRA)
  • Terminal Type: 1/4" Quick Connect
  • Reset Type: Automatic

description

Trane / American Standard SWT01275 Thermal Limit Switch - 135°F Open / 105°F Close (3" Insert) 


The Trane and American Standard SWT01275 is a genuine OEM high-temperature thermal limit switch designed as a critical safety component for residential and light commercial gas furnaces. This automatic-reset switch monitors the internal temperature of the heat exchanger or blower compartment, providing a "Normally Closed" (N/C) circuit that breaks upon reaching its 135°F threshold. This safety interlock prevents system overheating and potential damage by interrupting the ignition sequence or blower operation if temperatures exceed factory-safe limits. 


Key Features

  • Automatic Reset Safety: Designed to automatically reset the circuit once temperatures drop below the closing threshold (105°F), restoring normal system operation without manual intervention.
  • Precision Calibration: Factory-set to open at 135°F and close at 105°F (L135-30F rating), ensuring accurate thermal protection.
  • OEM Fit & Finish: Features a standard 3-inch insert length for precise placement within the airflow path of Trane and American Standard units.
  • High Life Cycle: Rated for up to 100,000 switching cycles, providing long-term reliability in demanding HVAC environments.
  • SPST Configuration: Single-Pole, Single-Throw (SPST) normally closed logic for seamless integration with modern furnace control boards. 


Product Details & Specification

  • Part Type: Thermal Limit Switch
  • Brand: Trane / American Standard (Therm-O-Disc)
  • Opening Temp: 135°F (Open on Temperature Rise)
  • Closing Temp: 105°F (Close on Temperature Drop)
  • Circuit: Normally Closed (N/C), SPST
  • Insert Length: 3 Inches
  • Voltage/Current: 120V AC (5.8 FLA / 34.8 LRA)
  • Terminal Type: 1/4" Quick Connect
  • Reset Type: Automatic


🛠️ HVAC Depot Pro Tip

A tripped SWT01275 limit switch is almost always a symptom of a larger airflow issue rather than a faulty part. Before replacing, check for a dirty air filter, blocked return grilles, or a failing blower motor. If the switch "pops" frequently, it can weaken over time; however, replacing it without fixing the underlying airflow restriction will likely result in the new part tripping immediately.


Cross-Reference

  • Superseded Part:

    There are no older Trane part numbers for this specific switch, though it is often searched as SWT1275.
  • Legacy / Manufacturing Numbers:

    C340056P13, 36T01B3, 42283, A1730, P13
  • Rating ID:

    L135-30F (indicating 135°F trip and 30°F differential). 


Model Compatibility

This limit switch is compatible with various Trane and American Standard high-efficiency furnaces and packaged units. Below are common compatible model prefixes; always verify the exact fit with your unit's data plate. 


Trane Models:

  • ADD Models: ADD060C936F0, ADD100R9V5F1, ADD100R9V5F2, ADD100R9V5F3, ADD1D120A9H51BA
  • CDB Models: CDB060A936D0, CDB060A936D1, CDB060A936D3, CDB1A060A9361AA
  • ADE Models: ADE1A060A9361AA, ADE1A060A9361AB
  • 4YCC/4YCY Models: 4YCC4036A1090AA, 4YCY4048C1115AA, 4YCZ6048C1115AA 


American Standard Models:

  • ADC Models: ADC060C936C1, ADC100C960A1
  • AUD Models: AUD2B080ACV32AA, AUD2D120B9V5VAA, AUD2D120H9V5VAA
  • ADD Models: ADD1A060A9361AA, ADD1A060A9361AB
  • FCAC Models: FCAC100A50A0, FCAC100A50D1 

Specification

Refund policy

Our refund and returns policy lasts 30 days. If 30 days have passed since your purchase, we can’t offer you a full refund or exchange. Please note there will be a 20% Re-stocking fee of product price.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Model and serial number must match what is on the invoice and correct box information.
Exclusions:
•    Part with obvious signs of use of installation.
•    Original box was destroyed or could not be located by purchaser.
•    Any item not in its original condition, is damaged or missing parts for reasons not due to our error.
•    Any item that is returned more than 30 days after delivery
Part installation
HVAC Parts and Equipment Depot recommend this parts will be installed by a licensed professional contractor. HVAC Parts and Equipment Depot assumes no liability for any injuries or damages arising from the user information or products. 
Sale items
Only regular priced items may be refunded. Sale items cannot be refunded. Special Order items cannot be refunded. 
Exchanges
We only replace items if they are defective or damaged from Manufactory. If you need to exchange it for the same item, send us an email at hvacpartsstore@gmail.com and send your item to: HVAC Parts & Equipment Depot 1135 E Plano Parkway Suite 8 Plano Tx 75189.
Refunds
To complete your return, we require a receipt or proof of purchase within 30 days or less.
Once your return is received and inspected by management team, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 7-14 Business days. HVAC Parts and Equipment Depot or its employees are not responsible for damaged items from manufactory.
Shipping returns
To return your product, you should mail your product to:
HVAC Parts & Equipment Depot
1135 E Plano Parkway Suite 8 Plano Tx 75074.
Customer will be responsible for paying for shipping. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.
Depending on where you live, the time it may take for your exchanged product to reach you may vary.
If you are returning more expensive items, you may consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item without a valid tracking number provided by your choice of delivery method.
Late or missing refunds
If you haven’t received a refund yet, first check your bank account again. This process takes approximately 7-14 business days depending on your Bank.
Then contact your credit card company, it may take some time before your refund is officially posted.
Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact us at hvacpartsstore@gmail.com
Special Orders
Special orders should be picked up within 30 Days of purchase day. Your items will be considered abandoned and will be returned to manufacturer. There will be a 100% Re-stocking fee for abandoned items. 

Need help?
Contact us via email hvacpartsstore@gmail.com or Phone 214-734-5222 for questions related to refunds and returns.
Thank you for choosing HVAC Parts & Equipment Depot.

Michel & Siso are very knowledgeable and explain everything to where I could understand! Amazing experience! Thank you will always come here for any AC needs. Trustworthy and excellent customer service.

Celest G.
Verified Customer
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