Nortiz Tankless Fan Noise Question

by Jon
(Jenkintown, PA, USA)

Noritz tankless installed 11 month ago. Great unit. Hot water excellent. Temp control exact when water temp measured.

In the last two weeks Fan motor started to make loud noise sounds like hi revs. with two speeds. Never did this before as unit fan was very quiet. The fan also runs for an extended period of time after burner shut down even if the hot water was just on for a few seconds.

Tech rep advises my plumber to remove fan and clean. Unit was descaled by plumber with no change. Have descale filter which apparently works well since no scale came out of the clean procedure after 11 months.

There was an amount of soot in the bottom of the unit cabinet which was cleaned out.

Plumber will order fan so as not to have to disassemble unit twice.

Any suggestions.


Thanks,