Error Code 11 on your Rheem Continuous Flow Gas Water Heater (874, 876 Series A12-A26) indicates a failure to ignite, a lack of gas supply, or the appliance failing to detect the flame after ignition attempts. This is a common issue often linked to gas supply problems or ignition system faults.
Firstly, safely check that your gas supply is turned on and gas isolation valves are fully open. If the gas supply is normal, but the issue persists, switch off power to the appliance at the isolation switch, and close all hot water taps. Because Error Code 11 involves gas and ignition components, it’s important to have the unit professionally inspected and serviced. Contact Hilton Plumbing to safely diagnose and resolve this issue.
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