Suburban | Replacement Furnace Core for SF-20F/SF-20FQ | 2606A | RP-20FQ

Restore your Suburban RV furnace to factory operation without the hassle of replacing the whole unit using the Suburban Replacement Furnace Core (Part #2606A / Model RP-20FQ). Instead of removing and repairing individual furnace components, simply slide this complete core module into your existing cabinet — getting you back to reliable heat with significantly less labor and cost than a full furnace replacement.

Why Replace the Core Instead of the Whole Furnace?

When a Suburban furnace fails, you have two options: replace individual components piece by piece (often diagnosing one fault, fixing it, then finding another), or replace the entire furnace including the cabinet. The furnace core is the third — and often best — option:

• Faster installation than rebuilding a furnace component by component
• Lower cost than buying a complete new furnace with cabinet
• Reuses your existing cabinet — no cutting, no resealing, no removing the entire unit from the wall
• Restores like-new operation — you get a fresh blower, burner, controls, and heat exchanger

Compatibility

The 2606A is designed to fit seamlessly into SF-20F and SF-20FQ series furnaces. Confirm your existing furnace series before ordering.

Wrong Series? Check the Gas Line

The key visual difference between this furnace core and the 2605A core (for SF-20 / SF-20Q series) is the gas line connection location:

• SF-20F / SF-20FQ (this 2606A core): gas line connects near the front (cabin side)
• SF-20 / SF-20Q (2605A core): gas line connects near the rear (exterior wall side)

Look at where your existing gas line enters the furnace cabinet — that tells you which core you need.

20,000 BTU of Reliable Heat

The replacement core delivers the same 20,000 BTU heating capacity as the original furnace — keeping your rig comfortable in cool weather just as the OEM unit did.

Includes the Furnace Control Board

Importantly, the 2606A core includes the furnace control board — so if your existing furnace fault is in the controls (a common failure point), this replacement takes care of it without a separate purchase.

Please note: The furnace core does not include the cabinet assembly — it slides into your existing cabinet.

⚠️ Professional Installation Recommended

Suburban gas appliances should be installed and serviced by a qualified service technician. Improperly installed gas furnaces are a fire and carbon monoxide risk.

Key Features

• Complete furnace core replacement — slides into existing cabinet
• 20,000 BTU heating capacity
• Includes the furnace control board
• Fits Suburban SF-20F and SF-20FQ series furnaces
• Cost-effective alternative to a full furnace replacement
• Time-saving installation compared to component-by-component repair
• Cabinet assembly not included (reuses your existing cabinet)
• Backed by a 2-year limited manufacturer warranty

Specifications

• Brand: Suburban
• Part Number: 2606A (Model RP-20FQ)
• Type: Replacement RV Furnace Core (includes control board)
• BTU Level: 20,000 BTU
• Compatibility: Suburban SF-20F and SF-20FQ series furnaces
• Includes Cabinet: No (reuses existing cabinet)
• Includes Control Board: Yes
• Dimensions: 12" W x 20" D x 7.5" H
• Warranty: 2-year limited manufacturer warranty