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This is a replacement thermostat switch for Suburban DSI (direct spark ignition) RV water heaters, wired for 12-volt systems. It's set to a 140°F operating point, matching the factory temperature control on compatible Suburban units.
The switch uses a simple crimp connector for wiring and is a compact, direct swap for a worn or failed original.
If your Suburban water heater isn't reaching or holding temperature, a worn thermostat switch like this is a common and inexpensive fix.
