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Trane / American Standard SWT01778 Reverse Flow Switch – Opens at 140°F, Closes at 125°F, 1/2" Automatic Temperature Switch

Trane / American Standard SWT01778 Reverse Flow Switch – Opens at 140°F, Closes at 125°F, 1/2" Automatic Temperature Switch

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Regular price $47.56 USD
Regular price Sale price $47.56 USD
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Key Features & Specifications

  • Genuine OEM Trane automatic reset reverse flow safety switch

  • Opens at 140°F and automatically resets at 125°F

  • Protects furnaces from overheating and reverse airflow

  • 1/2-inch mounting for direct OEM replacement

  • Compatible with Trane and American Standard gas furnaces

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Specifications

Product Details and Key Specifications:

Part Number: SWT01778

Manufacturer: Trane / American Standard

Part Type: Reverse Flow Safety Switch

Switch Type: Automatic Reset Temperature Switch

Open Temperature: 140°F

Reset Temperature: 125°F

Mounting Size: 1/2 Inch

Application: Gas Furnaces

Function: Monitors furnace temperature and opens the control circuit during reverse airflow or overheating conditions

Installation Type: Direct OEM Replacement

Compatible Brands: Trane, American Standard

Shipping Weight: Approx. 0.2 lb

description

Trane / American Standard SWT01778 Reverse Flow Switch – Opens at 140°F, Closes at 125°F, 1/2" Automatic Reset Safety Switch

The Trane / American Standard SWT01778 Reverse Flow Switch is a genuine OEM automatic reset safety switch designed to protect gas furnaces from overheating and unsafe reverse airflow conditions. This temperature-sensitive switch opens at 140°F to interrupt the control circuit when excessive heat is detected and automatically resets at 125°F once normal operating temperatures return.

Engineered to Trane OEM specifications, the SWT01778 provides dependable protection for critical furnace components by monitoring internal temperatures and helping prevent damage caused by airflow restrictions, blocked vents, or blower failures. Its 1/2-inch mounting configuration allows for a direct OEM replacement in compatible Trane and American Standard heating systems.


Key Features and Function:

Opens at 140°F – Interrupts the safety circuit when excessive temperatures are detected

Automatically Resets at 125°F – Restores normal operation after temperatures return to a safe range

Reverse Flow Protection – Helps protect the furnace from overheating caused by restricted or reversed airflow

Automatic Reset Design – No manual reset required after cooling

Genuine OEM Replacement – Manufactured for Trane and American Standard furnace applications


Product Details and Key Specifications:

Part Number: SWT01778/SWT0196

Manufacturer: Trane / American Standard

Part Type: Reverse Flow Safety Switch

Switch Type: Automatic Reset Temperature Switch

Open Temperature: 140°F

Reset Temperature: 125°F

Mounting Size: 1/2 Inch

Application: Gas Furnaces

Function: Monitors furnace temperature and opens the control circuit during reverse airflow or overheating conditions

Installation Type: Direct OEM Replacement

Compatible Brands: Trane, American Standard

Shipping Weight: Approx. 0.2 lb


🛠️ HVAC Depot Pro Tip: Replace the Cause, Not Just the Switch

If a reverse flow switch continues to trip, inspect the air filter, blower motor, evaporator coil, venting system, and heat exchanger for restrictions or airflow problems. Replacing the switch without correcting the underlying issue can result in repeated shutdowns and potential equipment damage.


Cross-Reference & Compatibility:

The SWT01778 is commonly used in compatible HVAC equipment requiring:

OEM Part Number: SWT01778

Switch Type: Automatic Reset Reverse Flow Switch

Open Temperature: 140°F

Reset Temperature: 125°F

Compatible Brands: Trane, American Standard

Always verify the part number, mounting style, temperature ratings, and electrical connections before ordering.

 

Specification

Refund policy

Refund & Return Policy

Last Updated: June 2026

At HVAC Parts & Equipment Depot, customer satisfaction is important to us. This Refund & Return Policy explains how returns, exchanges, and refunds are handled for purchases made through TopHVACParts.com.

Return Eligibility

We accept returns within 30 days of delivery.

To qualify for a return:

  • The item must be unused, uninstalled, and in its original condition.
  • The item must be returned in its original packaging.
  • Model numbers and serial numbers must match the original purchase records.
  • Proof of purchase or order confirmation is required.

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The following items are not eligible for return or refund:

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  • Items missing original packaging.
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  • Returns requested more than 30 days after delivery.

Restocking Fee

Approved returns may be subject to a 20% restocking fee.

The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.

Damaged, Defective, or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.

Email: support@tophvacparts.com
Phone: (214) 734-5222

We may request photographs and additional information to help process your claim.

If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.

Exchanges

We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.

To request an exchange, contact us at:

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Refund Process

Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.

If approved:

  • Refunds will be issued to the original payment method.
  • Processing typically takes 7–14 business days after approval.
  • Your financial institution may require additional time before the refund appears in your account.

Return Shipping

Customers are responsible for return shipping costs unless the return is the result of:

  • Our shipping error,
  • A defective product,
  • A damaged product received upon delivery.

Original shipping charges are non-refundable.

We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

Professional Installation Notice

Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.

Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

If you have questions regarding returns, refunds, or exchanges, please contact us:

HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

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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