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Lennox 50L98 LB-95368A High Limit Switch Kit Primary Safety

Name: Lennox 50L98 LB-95368A High Limit Switch Kit Primary Safety
Brand: Lennox
SKU: 50L98
Price: 183.13 USD
Availability: InStock

Low stock: 1 left

$183.13 USD

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Lennox 50L98 (LB-95368A) Limit Switch Kit. Genuine OEM safety part for G24, G32, and G40 furnaces. Fixes "Limit Open" errors

Critical Safety Component: Restores the primary thermal protection required to operate your gas furnace safely.
Eliminate Fault Codes: Fixes "Limit Switch Open" errors that cause the indoor blower to run constantly while the burners stay off.
Genuine OEM Reliability: Authentic Lennox part ensures the safety "cut-out" temperature is exactly what the manufacturer intended.
Quick 10-Minute Repair: Simple two-wire, two-screw installation gets your heat back on fast.
High-Heat Durability: Engineered to withstand thousands of thermal cycles without losing calibration or "drifting" off-temp.

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Specifications

Product Details

Brand: Lennox / Allied Air
Manufacturer: Lennox Industries / Therm-O-Disc
Part #: LB-95368A
Cat #: 50L98
UPC/SKU: 662551356775 / 50L98
Weight: 0.10 Pounds
Voltage: 24 VAC Control Circuit
Trip Temperature: Factory Set (Specific to LB-95368A Specs)
Ignition Type: Compatible with HSI, Spark, and Standing Pilot Systems

description

Lennox 50L98 LB-95368A High Limit Switch Kit Primary Safety

The Lennox 50L98 Limit Kit serves as the critical "safety brain" for your furnace’s heat exchanger, constantly monitoring internal temperatures to prevent catastrophic overheating. This primary limit switch is a normally-closed safety device that automatically breaks the electrical circuit to the gas valve if temperatures exceed factory safety thresholds—usually due to a failed blower motor or a severely clogged air filter. Engineered specifically for Lennox G24, G32, and G40 series furnaces, this kit ensures that your heating system fails safely rather than allowing the heat exchanger to crack or pose a fire hazard.

Key Features

Precision OEM Part Number: A direct factory-authorized replacement for 50L98 (LB-95368A), ensuring the temperature trip point and insertion depth match your furnace's original safety specifications.
Automatic Reset Technology: Features a bimetal disc that opens on temperature rise and automatically resets once the heat exchanger cools to a safe operating level.
Critical Safety Monitoring: Provides 24/7 thermal protection, acting as the final line of defense against "rollout" conditions and heat exchanger stress.
Fixed "No Heat" Issues: Resolves common "Primary Limit Open" fault codes (often a 4-flash or steady light depending on the board) that prevent the burners from igniting.
Corrosion-Resistant Terminals: Equipped with high-conductivity 1/4" spade terminals designed to maintain a solid electrical connection in high-vibration environments.

Product Details

Brand: Lennox / Allied Air
Manufacturer: Lennox Industries / Therm-O-Disc
Part #: LB-95368A
Cat #: 50L98
UPC/SKU: 662551356775 / 50L98
Weight: 0.10 Pounds
Voltage: 24 VAC Control Circuit
Trip Temperature: Factory Set (Specific to LB-95368A Specs)
Ignition Type: Compatible with HSI, Spark, and Standing Pilot Systems

🛠️ HVAC Depot Pro Tip

Take a Picture First! Before removing the two mounting screws, photograph the orientation of the switch and the color of the two wires connected to it. Limit switches are "position sensitive" within the airflow stream; installing it upside down can lead to "nuisance tripping" where the furnace shuts off before the house is actually warm. Diagnostic Check: If you are replacing this switch because it is "open," check your air filter and indoor blower wheel first. 90% of limit switch failures are caused by restricted airflow making the switch work too hard—replacing the switch without fixing the airflow will lead to another failure within weeks.

Cross-Reference

Superseded / Legacy: 50L9801, 100072-01, 100072-03
Drawing Numbers: LB-95368A, 603411-01
Therm-O-Disc Equivalent: 60T11-311545
Other Identifiers: L150-30, L170-40 (Verify Temp Code on Face)

Model Compatibility

G24 Series (Suffixes: UH, DF)
G32 Series (Suffixes: V, UH)
G40 Series (Suffixes: UH, DF)
G41 Series (Suffixes: UF)
G51 Series (Suffixes: MPV)
ML180 Series (Suffixes: 045, 070, 090)

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.

Non-Returnable Items

The following items are not eligible for return or refund:

Installed or used parts.
Products showing signs of installation, modification, or damage caused after delivery.
Items missing original packaging.
Sale or clearance items.
Special-order or custom-order products.
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:

support@tophvacparts.com

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

Refund & Return Policy

Last Updated: June 2026

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.

Non-Returnable Items

The following items are not eligible for return or refund:

Installed or used parts.
Products showing signs of installation, modification, or damage caused after delivery.
Items missing original packaging.
Sale or clearance items.
Special-order or custom-order products.
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:

support@tophvacparts.com

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

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Can anyone buy from your store, or do I need to be a licensed contractor?

We are open to the public! Homeowners, landlords, and DIYers are all welcome—no license required.

What kinds of HVAC parts do you sell?

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Do you sell parts for specific brands like Trane, Goodman, or Lennox?

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Yes, we accept returns or exchanges within a set time period—just make sure the item is unused and in original packaging. Ask for specific terms at the counter.

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While we don't install, we can answer basic questions and refer you to trusted local HVAC technicians if needed.

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Lennox 50L98 LB-95368A High Limit Switch Kit Primary Safety