Resetting a Rheem Performance water heater depends on whether you have a gas or electric model. For electric Rheem water heaters, you can perform a reset by shutting off the dedicated circuit breaker, removing the upper and lower access panels, and firmly pressing the red reset button on the high-limit thermostat switch until you hear a click. For gas Rheem water heaters equipped with electronic control modules or Honeywell gas valves, a reset is typically achieved by turning the control knob to the "Off" position, waiting five minutes for any lingering gas to clear, and then turning it back to the "Pilot" or "On" position while following manual ignition steps.
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