525018 Suburban Water Heater Thermostat / ECO 12V 140DEG

OEM 12‑Volt Thermostat + ECO High‑Limit Switch for Suburban RV Water Heaters

The 525018 is the OEM Suburban 12‑volt thermostat and ECO kit used on DSI‑style Suburban RV water heaters. This assembly includes the 140°F operating thermostat and the automatic high‑limit ECO safety switch, which opens on over‑temperature to protect the water heater.

The 525018 thermostat/ECO kit regulates the 12‑volt control circuit in Suburban DSI water heaters. The thermostat maintains a 140°F operating temperature, while the ECO provides an automatic high‑limit safety cutoff if the tank overheats.

Common symptoms indicating replacement:

• Burner not lighting

• Water overheating

• ECO tripping repeatedly

• Short‑cycling

• Intermittent or no hot water

This OEM kit restores proper temperature regulation and safety protection.

📐 Key Features

• OEM Suburban 12V thermostat + ECO safety switch

• 140°F operating thermostat

• Designed for DSI ignition systems

• ECO provides automatic high‑limit protection

• Direct replacement for factory assembly

• Fits multiple Suburban RV water‑heater models