Beeman
New Member
Hello All ..... hoping someone here can provide some insight maybe someone has had the same issue. Have a Bosch WH17 electric tankless hot water heater. Unit is approx 9 yrs old and has worked perfectly until recently when it stopped heating the water. I have replaced pretty much all components including circuit board, flow sensor, temperature sensor and both elements. The issue now is that the unit heats the water perfectly but when flow is shut off the primary element stays on and trips the thermal overload every time. Thinking maybe it was a bad circuit board, I switched the old one back in and had same result. Any ideas ? ... thanks
