Suburban 525006 Furnace Limit Switch – Replaces 232504 (SF Series, Green Dot, 160°/120°)

Product Overview

The Suburban 525006 Furnace Limit Switch (formerly part 232504) is a critical safety component designed for a wide range of Suburban SF series RV furnaces. This switch monitors internal furnace temperature and automatically shuts down the system if overheating occurs, protecting your furnace from damage.

This is one of the most commonly replaced limit switches in Suburban furnaces, especially in SF-25, SF-30, and SF-35 models. It is identified by a green dot color code and operates at 160°F (open) and 120°F (close).

Replacing a faulty limit switch can restore proper furnace cycling and prevent shutdown issues caused by overheating.

Key Features

• Replaces Suburban part 232504 (updated part number 525006)
• Designed for Suburban SF series furnaces
• Green dot identification for correct part matching
• Temperature rating: 160°F open / 120°F close
• Automatically shuts down furnace if overheating occurs
• Helps restore safe and reliable furnace operation
• Direct OEM replacement for proper fit and function
• Single limit switch design

Specifications

• Part Number: 525006
• Replaces: 232504
• Product Type: Furnace limit switch
• Temperature Rating:
  • Opens at 160°F
  • Closes at 120°F
• Identification: Green dot
• Configuration: Single
• Application: Suburban SF series furnaces

Compatible Furnace Models

Suburban SF Series

• SF-20
• SF-30
• SF-35

Suburban SF-F Series (Above Serial #921403895)

• SF-25F
• SF-30F
• SF-35F 

Suburban SF-Q Series

• SF-25Q
• SF-30Q
• SF-35Q

Suburban SF-FQ Series

• SF-25FQ
• SF-30FQ
• SF-35FQ

Important Compatibility Note

• SF-F models must be above Serial Number 921403895
• Confirm the green dot marking on your existing switch before ordering
• Designed specifically for the models listed above

When Should You Replace the Limit Switch?

You may need the 525006 limit switch if your furnace:

• Shuts off shortly after starting
• Cycles on and off repeatedly
• Overheats or blows cold air intermittently
• Will not stay running
• Shows signs of thermal shutdown

A faulty limit switch is one of the most common causes of furnace shutdown issues.

Why This Part Matters

• Protects your furnace from overheating damage
• Ensures safe operation of your RV heating system
• Restores proper furnace cycling and performance
• One of the most common failure points in SF series furnaces

FAQ

What part does this replace?
This replaces Suburban part 232504.

How do I identify the correct switch?
Look for the green dot color code and match the temperature rating (160°/120°).

Will this fit all SF furnaces?
It fits many SF models, but some require serial number verification—especially SF-F models.

What does a limit switch do?
It shuts down the furnace if it overheats, preventing damage and unsafe operation.

Is this a common replacement part?
Yes, this is one of the most commonly replaced Suburban furnace limit switches.