Water Heater Error Codes and Repair Guides
Water-heater fault-code guides for tankless and tank units, including ignition, flow, sensor, overheat, and reset checks.
Common water heater fault patterns
- Ignition, pilot, gas valve, flame sensor, flow, thermistor, and overheat errors.
- Tankless venting, condensate, descaling, recirculation, and freeze-protection faults.
- Tank water-heater control, element, thermostat, and pressure-related problems.
Water heater repair decision checks
- Confirm unit type, fuel type, and model family before buying ignition or control parts.
- Check water flow, scale, venting, and power supply before replacing boards.
- Use repair quotes for gas, combustion, venting, or repeated safety shutdowns.
-
State Water Heater Error Codes - Gas, Electric, and Hybrid
Updated:State water-heater error-code guide for gas, electric, and heat-pump models, including LED flashes, display faults, sensors, and elements.
-
Rheem Water Heater Error Codes - LED, EcoNet, Tankless
Updated:Rheem water heater error-code guide for LED flashes, EcoNet display codes, tankless faults, descaling clues, sensor checks, and element faults.
-
Rheem Tankless Control Board Replacement
Updated:Rheem tankless control-board guide for PCB faults, power checks, sensors, flame signal, fan wiring, and exact board matching before replacement.
-
Bradford White Water Heater Error Code 4 - Ignition Lockout Fix
Updated:Bradford White code 4 means ignition lockout. Check gas pressure, igniter, flame sensor, venting, condensate, and control wiring.