Bosch Washer Error Codes — Complete Error Code Diagnosis Guide

Seven Bosch washer codes are covered, and they follow the cycle from the moment the door shuts. E27 and E43 are the lock — an interlock that failed against a lock motor that will not drive. E13 and E17 are the fill: a supply turned off, a kinked AquaStop hose or a clogged valve screen against a valve or pressure sensor that has stopped reporting. E18 is the drain, usually a clogged pump filter. E02 is the EcoSilence drive motor, including carbon-brush wear on models that have them. E04 is a water leak, at the door boot, a hose connection, or the tub seal.

The pairs in that list are what the guides work hardest to separate, because each pair has a cheap member and an expensive one. E13 and E17 both end in an unfilled tub, so the check order runs tap, hose, then the four inlet-valve screens before any valve is bought. E27 and E43 both leave the door unusable, and the difference is whether the mechanism fails to latch or the motor fails to turn. E18 starts at the filter cap, which is also where the water still in the drum has to come out.

E04 is the code that should stop a cycle rather than start a part search: a tub-seal leak reaches the bearing, and every additional wash makes the eventual repair larger. The door boot is homeowner-reachable, the tub seal is not. Carbon brushes and the motor control module are line-voltage work behind a panel that also carries water. There is no gas and no refrigerant in this index. EasyBear repairs Bosch washers across Sacramento and the Bay Area.