Local Rinnai tankless repair service dealers in Hamilton Ontario. Full Rinnai hot water heater installation, Rinnai tankless replacement and regular maintenance in the surrounding Hamilton areas.    Service repairs  (647) 931-5211

Here are some common Rinnai tankless water heater troubleshooting issues.

 Here are 10 reasons why a Rinnai tankless hot water heater may not be working, often identified by Rinnai error codes below.  If you need more help with your Rinnai system in the Hamilton Ont. areas, such as Ancaster, Dundas, Aldershot. Burlington, Stoney Creek, Flamborough Ontario call us, for repair service.   Service repairs  (647) 931-5211

Blocked Air Supply or Exhaust (Error 10): The venting system is obstructed, or the fan is dirty, preventing proper combustion.

 Ignition Failure (Error 11): The unit cannot ignite the burner, usually due to a lack of gas supply, a closed gas valve, or a faulty igniter.

 Flame Failure (Error 12): The unit lights, but cannot maintain a flame, which may be caused by low gas pressure, improper venting, or a faulty flame sensor.

 Mineral Scale Buildup (Error LC): Hard water has caused limescale accumulation in the heat exchanger, requiring a descaling/flushing procedure.

 Insufficient Water Flow: The flow rate is too low to trigger the unit to turn on, which can be caused by a clogged inlet filter screen or low pressure.

 Power Supply Issues: The unit is not receiving electricity due to a tripped circuit breaker, blown fuse, or loose wire.

 Overheat/Thermal Fuse (Error 14): The unit has shut down due to overheating, often caused by a blocked heat exchanger or failure of the heat sensor. Air in the Gas Lines: If the unit is new or the gas was recently turned off, air in the line can prevent ignition.

 Frozen Pipes: In cold climates, the water lines or the unit itself may be frozen. Faulty Circuit Board or Sensors: Electrical components like the computer board (PCB) or sensors are malfunctioning, preventing proper operation.

Quick Tips: Check for Error Codes: The digital display will show a code (e.g., 10, 11, 12, LC) to narrow down the issue. Reset the Unit: Try turning the unit off, then back on, or resetting the circuit breaker. Clean the Inlet Filter: Remove and clean the cold water filter screen to fix flow issues.

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