luke warm water at east unit

luke warm water at east unit

by David DeWindt
(Escondido Ca.)

We have two Takagi tankless water heaters one at the east end of the house that serves the master bath, laundry, and kitchen. The other is at the west end and services a powder bath (sink Only)a jack and jill bath with two sinks, tub/shower combo.

(And a third bath with two sinks and a shower, and a wash machine. And last a kitchenette with a sink and a dishwasher) this is a rental unit that is part of the house. The east end heater works fine but the one on the west end works fine in the rental section of the house but in the jack/jill bath and the powder bath which are all within 20' of each other, the water only gets luke warm at the sinks and tub/shower.

What I have tried to date!
1) Flushed out the unit with vinegar for an hour
2) cleaned out the incoming water filter
3) changed out the mixer valve cartridge at tub/shower
4) added a temperature/ diagnostic controller

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water heaters