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

4.9/5 based on 4750 reviews

Lennox 619559-01 Defrost Control Board Kit – Genuine OEM Heat Pump Defrost Control Board

Lennox 619559-01 Defrost Control Board Kit – Genuine OEM Heat Pump Defrost Control Board

Low stock: 1 left

Regular price $212.00 USD
Regular price Sale price $212.00 USD
Sale Sold out
Shipping calculated at checkout.

Key Features & Specifications

  • Genuine OEM Lennox heat pump defrost control board kit

  • Controls automatic outdoor coil defrost operation

  • Supports reliable heat pump heating performance

  • Factory-compatible design for Lennox HVAC systems

  • Direct-fit replacement for residential heat pump systems

Please visit our store for pick up.

Quantity

safe & secure Checkout

Fast & Tracked Delivery
30 Day money back guarantee

Specifications

Product Details and Key Specifications:

Part Number: 619559-01
Catalog Number: 16V37
Manufacturer: Lennox (Genuine OEM)
Part Type: Defrost Control Board Kit
Application: Residential Heat Pump Systems
Function: Controls Heat Pump Defrost Operation & Outdoor System Timing
Control Type: Electronic Defrost Control Board
Installation Type: Direct OEM Replacement
Compatible Brands: Lennox
Electrical Compatibility: OEM Factory Matched
Shipping Weight: Approx. 1-3 lbs

description

Lennox 619559-01 Defrost Control Board Kit – Genuine OEM Heat Pump Defrost Control Board

The Lennox 619559-01 Defrost Control Board Kit is a genuine OEM heat pump defrost control board engineered to manage outdoor coil defrost cycles and system operation in residential HVAC heat pump systems. Designed to monitor outdoor operating conditions and control automatic defrost sequencing, this control board helps maintain efficient heating performance during cold weather operation.

Built to OEM specifications for exact compatibility and dependable long-term operation, the 619559-01 defrost control board provides reliable communication between outdoor components while protecting the heat pump system from excessive frost accumulation. Its factory-programmed design ensures proper defrost timing, compressor operation, and system efficiency in compatible Lennox heat pump systems.


Key Features and Function:

Automatic Defrost Cycle Control – Regulates outdoor coil defrost operation for heat pump efficiency
Genuine OEM Compatibility – Designed specifically for Lennox HVAC heat pump systems
Integrated System Protection – Helps prevent frost buildup and airflow restriction
Direct-Fit OEM Design – Factory-compatible wiring and mounting simplify installation


Product Details and Key Specifications:

Part Number: 619559-01
Catalog Number: 16V37
Manufacturer: Lennox (Genuine OEM)
Part Type: Defrost Control Board Kit
Application: Residential Heat Pump Systems
Function: Controls Heat Pump Defrost Operation & Outdoor System Timing
Control Type: Electronic Defrost Control Board
Installation Type: Direct OEM Replacement
Compatible Brands: Lennox
Electrical Compatibility: OEM Factory Matched
Shipping Weight: Approx. 1-3 lbs


🛠️ HVAC Depot Pro Tip: Inspect the Defrost Sensor Before Replacing the Board

A failed defrost cycle is not always caused by the control board itself. Before replacing the board, inspect the defrost sensor, outdoor coil thermistor, reversing valve operation, and low-voltage wiring for damage or corrosion. Frost buildup caused by airflow restrictions or refrigerant issues can also mimic board failure symptoms.


Cross-Reference & Compatibility:

The Lennox 619559-01 is a direct OEM replacement for the following applications:

OEM Numbers: 619559-01
Catalog Number: 16V37
Compatible Brands: Lennox
Application Type: Heat Pump Defrost Control Boards
Board Style: Electronic Defrost Control Board Kit


Extensive Model Compatibility List:

Compatible Lennox Heat Pump Series:

• XP Series Heat Pumps
• Elite Series Heat Pumps
• Merit Series Heat Pumps
• Residential Split-System Heat Pumps
• High-Efficiency Heat Pump Systems
• Outdoor Condensing Units
• Select Lennox Residential HVAC Systems
• Select Lennox Heat Pump Applications

Always verify part number, wiring configuration, sensor compatibility, and control board layout 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.

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

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
View full details

Happy Shouts From Our Thrilled Customers

YOU MAY ALSO LIKE

Explore More Products

HVAC Parts and Equipment Depot

Frequently Asked Questions

Questions? We’ve got you covered

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

We carry blower motors, fan motors, capacitors, control boards, contactors, thermostats, filters, copper lines, refrigerants, and more.

Yes, we stock OEM and compatible replacement parts for major brands including Trane, Goodman, Lennox, Carrier, Rheem, and others.

Absolutely! Bring in the part, model number, or a picture, and our team will help match you with the correct replacement.

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.

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

We sell certain refrigerants, but EPA regulations require certification for purchase of products like R-410A or R-22.

We offer both! You can shop in person or call to arrange shipping if you're out of town.