Error Code 75 indicates an “Internal Control System Fault” on your Rheem Continuous Flow Water Heater. This typically points to an issue within the internal electronic components controlling unit operations.
For safety, immediately switch off the electrical supply at the isolation switch and close all hot water taps. Due to the internal electronic nature of this fault, professional diagnosis and repair are essential. Contact Hilton Plumbing promptly to inspect and correct this issue.
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