Question about Bosch AquaStar Indoor Natural Gas Tankless Water Heater with Vent Hood #125
I have same problem , bosch said 300.00 dollar to replace control panel my unit has been doing this sinces installation over 4yrs. If you call bosch be prepaired to be put on hold a long.......long.... time.
A2 error code.
Posted on Jan 04, 2010
1/ check overheat stat 2/ check fan esp the little flexie hose rear fan area for pinhole 3/check diaphrapm valve 4/ check micro switch best of luck
Posted on Oct 31, 2009
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Posted on Jan 02, 2017
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