Are you having trouble with your Atwood or Dometic RV water heater? This guide will help you diagnose virtually all gas models, whether your water heater won’t ignite, won’t stay lit, or shuts down after approximately 7 seconds.

You’ll learn the complete sequence of operation and follow a step-by-step troubleshooting process as we trace the entire 12-volt DC control circuit of the gas ignition system. By understanding how each component works and what signals to expect, you’ll be able to quickly isolate the cause of the failure and make an accurate repair.

Whatever issue you are having with the gas side (minus gas system troubleshooting) will be talked about in this guide.

Note: This guide covers only the LP gas operation of Atwood and Dometic water heaters. Electric heating elements and 120-volt AC operation are not included.

Need a deeper dive into the control circuit (brown wire from and back to control board) troubleshooting?