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 85K35 / 85K3501 OEM Natural Gas Valve – 24V, Dual Direct Ignition, 3/4" x 3/4", Standard Opening

Lennox 85K35 / 85K3501 OEM Natural Gas Valve – 24V, Dual Direct Ignition, 3/4" x 3/4", Standard Opening

In stock

Regular price $1,238.45 USD
Regular price Sale price $1,238.45 USD
Sale Sold out
Shipping calculated at checkout.

Lennox 85K35 / 85K3501 24V Natural Gas Valve

  • Genuine Lennox OEM natural gas valve

  • Designed for dual direct ignition applications

  • 24V gas valve with standard-opening operation

  • 3/4" x 3/4" inlet and outlet connections

  • 0.62A anticipator setting

Please visit our store for pick up.

Quantity

safe & secure Checkout

Fast & Tracked Delivery
30 Day money back guarantee

Specifications

Specification

Details

Brand

Lennox

Catalog Number

85K35

Model / Part Number

85K3501

Product Type

Gas Valve

Fuel Type

Natural Gas

Voltage

24V

Ignition Application

Dual Direct Ignition

Inlet Size

3/4"

Outlet Size

3/4"

Connection Configuration

3/4" x 3/4"

Opening Type

Standard Opening

Anticipator Setting

0.62 A

Function

Burner Gas Flow Control

Application

Gas Heating Equipment

OEM Component

Yes

 

description

The Lennox 85K35, model/part 85K3501, is an OEM 24V natural gas valve designed for compatible Lennox gas-fired heating equipment using a dual direct ignition system.

This valve features 3/4" x 3/4" inlet and outlet connections, standard-opening operation, and a 0.62A anticipator setting. It controls natural gas flow to the burner assembly during the heating and ignition sequence.

Key Features & Function

  • Genuine Lennox OEM replacement component
  • Cat #: 85K35
  • Model / Part #: 85K3501
  • Natural gas application
  • 24V operation
  • Dual direct ignition application
  • 3/4" inlet
  • 3/4" outlet
  • Standard-opening gas valve
  • 0.62A anticipator setting
  • Controls natural gas flow to the burner assembly
  • Designed for compatible Lennox gas heating equipment
  • Furnace and commercial heating applications where specified

Product Details & Key Specifications

Specification

Details

Brand

Lennox

Catalog Number

85K35

Model / Part Number

85K3501

Product Type

Gas Valve

Fuel Type

Natural Gas

Voltage

24V

Ignition Application

Dual Direct Ignition

Inlet Size

3/4"

Outlet Size

3/4"

Connection Configuration

3/4" x 3/4"

Opening Type

Standard Opening

Anticipator Setting

0.62 A

Function

Burner Gas Flow Control

Application

Gas Heating Equipment

OEM Component

Yes

🛠️ HVAC Depot Pro Tip

Do not match the 85K35 / 85K3501 based only on the 24V rating and 3/4" connections. Gas valves with similar dimensions can have different ignition-control requirements, opening characteristics, electrical specifications, and fuel applications.

Verify:

Catalog Number: 85K35
Part Number: 85K3501
Fuel: Natural Gas
Voltage: 24V
Ignition: Dual Direct Ignition
Connections: 3/4" x 3/4"
Opening: Standard
Anticipator Setting: 0.62 A

Gas-valve replacement should include leak testing, inlet and manifold gas-pressure verification, ignition testing, and combustion checks according to the equipment manufacturer's procedures and applicable codes.

Equipment / Model Compatibility

The Lennox 85K35 / 85K3501 is intended for select Lennox gas-fired heating equipment requiring this specific 24V dual direct ignition natural gas valve.

Typical applications include:

  • Select Lennox gas furnaces
  • Select Lennox commercial heating equipment
  • Natural-gas heating systems
  • Dual direct ignition systems
  • Equipment requiring a 3/4" x 3/4" gas valve
  • Equipment specifically calling for 85K35
  • Equipment specifically calling for 85K3501

Always verify the complete equipment model and serial number 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.