SOURCE: reset keeps triping
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/250SXTechSupport/Troubleshoot/tabid/563/Default.aspx
click on this link and it has the troubleshooting in strucktions for the unit . hopt that it helps you out.
SOURCE: BOSCH AQUASTAR 2400ES NATURAL GAS TANKLESS HOT WATER HEATER
Q.
FA - Gas leakage error, gas valve circuit not closing properly
A.
Q.
EA - No flame ionization detected with water flow
A.
Q.
C1 - Fan rotation too low on startup
A.
SOURCE: I had our 1600ng Bosch water heater installed a
on the front of the water heater down at the bottom there is a thermostat (usualy a blue knob) turning it clockwise will increase the tempature of your water
(good Luck)
SOURCE: powerstar 115 tankless tripping reset
I don't have specific suggestion for tankless tripping breaker or if that is a circuit breaker problem or a tankless problem.
1) Move wires to another same-size breaker and see if problem persists.
2) Compare amp draw on tankless label with wire size and breaker size amp rating.
For example 30 amp breaker using 10ga wire is rated for 80% of listed amps or 24 amps.
3) If you are drawing full 30 amps, then 30 amp breaker is getting hot. Breaker trips with heat. Older breakers can trip more easily.
http://waterheatertimer.org/How-to-replace-circuit-breaker.html
4) Before calling service technician, open following link for Bosch troubleshooting steps.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
5) Be sure to read manual for yearly maintenance requirements.
6) Add a tempering tank for incoming cold water problem.
http://waterheatertimer.org/Tempering-tank.html
7) All gas tankless brands can be repaired by homeowner for $330.
http://waterheatertimer.org/How-to-install-gas-water-heater.html
SOURCE: I have a powerstar ae115
You've done the required first-step troubleshooting and maintenance.
If thermal cutout keeps tripping, and unit is actually reaching 185, then something is wrong with wiring, temperature sensor, gas valve, or PC board. Or combination of factors.
Call service technician, and open following link for some Bosch tankless resources including Bosch contact information:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
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