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Lennox 73W20 Limit Switch L175-30F 175°F Open-on-Rise 5" OAL

Lennox 73W20 Limit Switch L175-30F 175°F Open-on-Rise 5" OAL

Low stock: 2 left

Regular price $65.00 USD
Regular price Sale price $65.00 USD
Sale Sold out
Shipping calculated at checkout.

Key Features & Specifications

  • Genuine Lennox OEM L175-30F limit switch ensures system safety and reliability.

  • Actuates (opens circuit) at 175°F and automatically resets at 145°F.

  • Durable metal construction designed for longevity in industrial HVAC environments.

  • STILT surface mount design with standard screw terminals for easy installation.

  • Essential safety device compatible with a wide range of Lennox, Armstrong, and Ducane furnaces.

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Specifications

Feature Specification
Model Number L175-30F
Switch Action Open On Rise
Opening Temperature 175°F
Reset Temperature 145°F
Overall Length (OAL) 5 inches
Mounting Type STILT (Surface Mount)
Terminal Type Screw
Reset Type Automatic

description

 Lennox 73W20 Limit Switch L175-30F 175°F Open-on-Rise 5" OAL

The Lennox 73W20 is a genuine OEM limit control switch (L175-30F) designed for use in Lennox, Armstrong, and Allied Air furnaces. This critical safety component monitors the temperature within the heating system and automatically interrupts the electrical circuit if the temperature exceeds a safe limit, preventing overheating and potential damage to the heat exchanger. 

Key Features:

  • Safety Assurance: Designed to open the circuit precisely at 175°F to protect the furnace from dangerous overheating conditions.
  • Automatic Operation: Features an automatic reset function, allowing the system to resume operation once the temperature drops to the safe threshold of 145°F.
  • Durable Construction: Built with rugged metal materials to withstand the demanding thermal environment of a furnace.
  • Direct OEM Fit: Engineered for direct compatibility with numerous Lennox HVAC systems, simplifying installation and ensuring proper functionality. 

Product Details:

  • Feature: Specification
  • Model Number: L175-30F
  • Switch Action: Open On Rise
  • Opening Temperature: 175°F
  • Reset Temperature:145°F
  • Overall Length (OAL): 5 inches
  • Mounting Type:   STILT (Surface Mount)
  • Terminal Type: Screw
  • Reset Type: Automatic

🛠️ HVAC Depot Pro Tip:

A faulty limit switch is a common cause of a furnace that cycles on and off repeatedly ("short cycling"). If your furnace is short cycling, use a multimeter to test continuity on this switch after the furnace has been running for a few minutes. If it opens prematurely (below 175°F), the switch is defective and requires replacement. 

Cross-Reference:

  • Manufacturer: Lennox / Armstrong / Allied Air
  • Drawing/X Numbers: 102857-07
  • Legacy Numbers: 73W2001, 68J28, 68J2801, R102857-07 

Model Compatibility:

This safety switch fits numerous popular Lennox models, including: 

  • EL195UH045XE36B-01
  • ML193UH045XP36B-59
  • LRP13GXK36-072-01
  • Various G-series and residential air handler units

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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