Bosch Washer Error Code Er:12

Er:12 means the washer was unable to fill with water within the time limit set by the control board. The machine stopped the cycle automatically to protect internal components from running dry. The fault points to the water inlet valve, the supply hoses, or the wiring harness connected to the valve. Service tests P8, P9, and P13 are used to isolate the specific cause.

You should not attempt to run wash cycles while Er:12 is active. The washer has halted the cycle because it detected insufficient water, and forcing operation without adequate water in the drum can damage the pump, motor bearings, and other components. Resolve the fill issue before resuming normal use.

Resetting the washer may temporarily clear the error code from the display, but the code will return as soon as the machine attempts to fill again if the underlying problem has not been corrected. A reset is useful for confirming a repair was successful, but it is not a fix on its own. Address the root cause in the fill circuit before relying on a reset to resume normal operation.

Some causes of Er:12 are straightforward to address without professional help. Check that the water supply shutoff valves behind the washer are fully open, and inspect the inlet hoses for kinks or a clogged filter screen at the valve connection. If these checks do not resolve the error, testing the inlet valve solenoid and wiring harness requires a multimeter and some comfort with appliance diagnostics, so a technician may be appropriate at that point.

Repair cost depends on the failed component. If only the supply hose needs replacement or a clogged screen needs cleaning, costs are minimal, typically under $30 for parts. A replacement water inlet valve usually runs between $40 and $120 for the part alone, plus labor if a technician performs the work. Control board replacement, if required, is the most expensive outcome and can range from $150 to $350 or more for parts.