Error Code 03 on your Rheem Continuous Flow Water Heater indicates an EZ Link communication fault. This occurs when there’s a communication failure between two units linked together for increased capacity.
First, turn off the electrical supply at the isolation switch for both units. Wait a few minutes, then switch power back on to see if the error clears. If Error Code 03 persists, professional assistance is required due to the complexity of the internal link communication. Contact Hilton Plumbing for prompt diagnosis and resolution.
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