Suburban 2614A Furnace Core – RP-40N – NT-40 Replacement – 40,000 BTU

Product Overview

The Suburban 2614A Furnace Core (RP-40N) is a direct replacement heating core designed for Suburban NT Series furnaces, specifically the NT-40 model. This complete furnace core assembly restores proper heating performance by replacing worn or damaged internal components.

With a 40,000 BTU output, this is one of the highest-capacity Suburban furnace cores—ideal for larger RVs or applications requiring stronger heat output. It is fully compatible with electronic ignition systems and installs as a complete internal replacement module.

Key Features & Benefits

• Direct replacement for Suburban part #2614A
• Designed for NT Series furnaces (NT-40)
• 40,000 BTU output for powerful heating performance
• Compatible with electronic ignition systems
• Complete core assembly simplifies repair and reduces diagnostic time
• Restores full furnace efficiency and reliability
• Cost-effective alternative to full furnace replacement

Compatibility

Compatible with the following Suburban furnace model:

• NT-40

Replaces:

• RP-40N Furnace Core Assembly

Product Specifications

• Part Number: 2614A
• Model: RP-40N
• BTU Rating: 40,000 BTU
• Ignition Type: Electronic Ignition
• Dimensions:
  • Height: 12-1/2 inches
  • Width: 17 inches
  • Depth: 23 inches
• Application: Suburban NT Series Furnaces

What’s Included

• (1) Suburban 2614A Furnace Core Assembly (RP-40N)

Note: Furnace cores are typically sold as a complete internal module and do not include the outer cabinet housing

Common Issues This Part Solves

• Furnace blowing cold air
• Cracked or failing heat exchanger/core
• Weak or inconsistent heat output
• Furnace short cycling or overheating
• Aging or heavily worn furnace internals

Installation Notes

• Professional installation is recommended
• Verify compatibility with NT-40 model before purchase
• Disconnect gas and power prior to servicing
• Follow all Suburban safety and installation guidelines

Why Replace the Furnace Core Instead of the Whole Furnace?

Replacing the furnace core allows you to restore your RV furnace’s heating performance while avoiding the cost and labor of replacing the entire unit. The 2614A core is designed as a self-contained module, reducing installation complexity and improving reliability.

Frequently Asked Questions (FAQ)

Q: Will this fit other NT series furnaces besides NT-40?
A: No, this core is specifically designed for the NT-40 furnace.

Q: Is this a complete furnace?
A: No, this is the internal furnace core assembly only, not a full furnace unit.

Q: Does this include the control board?
A: Yes, furnace cores commonly include major internal components, and some listings indicate the control board is included with the assembly.

Q: Can I install this myself?
A: Installation is best handled by a qualified RV technician due to gas and electrical components.