230849 Suburban RV Furnace Limit Switch L175

The 230849 Suburban RV Furnace Limit Switch is the OEM high‑limit safety switch used in several Suburban RV furnaces, (NT-20SE) It protects the furnace from overheating by opening the circuit when the heat exchanger reaches its rated temperature threshold, then automatically resets once temperatures return to a safe range. The product page you have open identifies the part clearly as a Suburban limit switch and confirms its active status in your Shopify catalog.

🔧 What this limit switch does

This switch is part of the furnace’s safety chain and ensures the heat exchanger never exceeds safe operating temperatures. It works by:

• Monitoring the heat exchanger temperature

• Opening the circuit if temperatures exceed its rated limit

• Automatically resetting when temperatures drop

• Preventing overheating, short‑cycling, and heat‑exchanger damage

• Working in sequence with the sail switch, ignition board, and thermostat

A failing limit switch often causes intermittent heating, furnace shutdowns, or blower‑only operation.

🧰 Key Features

• OEM Suburban auto‑reset limit switch

• Direct‑fit replacement for compatible Suburban RV furnaces

• Restores proper furnace safety and cycling behavior

• Matches OEM wiring and mounting footprint

• Designed for high‑heat RV furnace compartments