[SOLVED] Tankless water heater flush Easy descaling method Fix error code LC Rinnai RL75i

This is the fix for error code LC and some others. Flush your Rinnai, Noritz, Bosch, Rheem tankless water heater with distilled white vinegar each year if you have soft water or every 6 months for hard water. If your water heater displays an error code, it could be a result of lime scale. If you find that it takes longer to heat water, turns off and on mid-shower, or doesn't turn on at all, its is likely time to do a vinegar flush. Also, when you start to see lime scale buildup on your faucets or shower heads, it's time to flush your tankless water heater.

You'll need:
(1) gallon distilled white vinegar
(1) 5 gallon bucket
(1) submersible utility pump
(2) 3 or 6 foot washing machine hoses

1 hour