In this guide, we take an in-depth look at the high-limit and control thermostat assembly on Suburban SW-style water heaters and how to test them.

Is your Suburban water heater not producing hot water on electric, or is it failing to operate on propane? A faulty thermostat or high-limit thermostat could be the cause.

In this guide, I’ll walk you through the troubleshooting process, explain what to look for, and show you how to identify a faulty component so you can get your water heater back up and running.