We have a noritz tankless water heater that we installed & it stayed on all evening, provided hot water etc. Decided to move the display & turned off. Now when we go to turn it on, it will flash FF on the display for about 5 seconds & then turn off
Water Heaters - Noritz - 6.3 Gallon Residential Tankless Water Heater - N-063S
Answers & Comments
Check the wiring connections for your remote. The FF is related to communication problems with the remote. You should also reset the unit by disconnecting electricity, waiting 20 seconds, and then reconnecting electricity to the heater.