Error Code E01 on your Rheem Heat Pump (551270 in R134a) indicates a system fault that may involve sensors, electrical components, or controls. This can temporarily halt normal heating operation, potentially leaving you without sufficient hot water.
Immediately turn off the power supply at the isolation switch and ensure all hot water taps are closed. Wait for a few minutes before restarting the system to see if the error clears. If Error E01 reappears, it indicates a persistent fault requiring professional diagnosis and repair. Contact Hilton Plumbing promptly to arrange inspection and servicing.
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