Suburban Mfg 525018 Thermostat Limit Switch DSI 12V 140°F

The Suburban Manufacturing 525018 is a replacement limit thermostat designed for Direct Spark Ignition (DSI) furnaces operating on 12-volt systems. This safety component monitors temperature and automatically shuts off the furnace if it exceeds safe operating limits, protecting your RV heating system from overheating.

Key Features:

• 140°F temperature limit setting for reliable overheat protection
• Designed specifically for Suburban DSI furnace models
• 12-volt DC operation for RV and mobile applications
• Direct replacement part for worn or faulty limit switches
• Factory OEM component ensures proper fit and function

This optional limit thermostat is an essential safety device that helps prevent damage to your furnace and RV. When the internal temperature reaches 140°F, the switch opens the circuit to stop burner operation. Once temperatures return to safe levels, normal operation resumes. Easy to install as a direct replacement for your existing limit switch.