Question about Bosch PowerStar AE125 AE125 Whole House Electric Tankless Water Heater...
Heating water can peculate chemicals out of water, such as metals and organics.
Especially above 138 degrees.
Have well water tested.
Turn down thermostat temperature.
Or reasonably harmless well-water bacteria can react with anode rod, or other reaction in softener, to produce colored water, and smells.
Different water can produce different sludges, brown, red, gray, black, yellow.
The sludge can also combine with deteriorating pipe flakes to clog water flow.
Sludge can accumulate over years in low spots in pipes, or at elbows and constrictions.
Have plumber flush pipes.
Or run new pipes.
Also delime tankless yearly, and flush with white vinegar as shown in product manual, and treat bacteria with H2O2 hydrogen peroxide.
Posted on Oct 30, 2012
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Posted on Jan 02, 2017
the circuit board is gone bad, try this, with power off reset the overload on the heater.Turn power back on and turn on water to the unit. with no taps open hold the pipe near the left element for a few minutes. it will most likely getting verry hot and trip the overload.(this is done with no water running and power on to the unit).you may even hear the water in the left elemnet start to boil or sizle. the reason for this is the triacs on the cir board are bad.I have troubleshoot this troblem many times. the design is bad and their in now a new unit (redesign) out . bosch knows their junk and wont cover them beyond 1 yr. one way around it is call tech at bosch and tell them its leaking. the u will get one of the new designs. Also applies to the AE125, Rp27pt
Posted on Mar 07, 2012
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