Bosch Washer Er:12 Means Water Is Coming In Too Slowly

What Er:12 means

In contrast to Er:11, water is reaching the machine here, only at a trickle. The fill takes longer than the control permits, so it quits with Er:12. Bosch lists the same suspects as for the no-water error: the inlet valve, the wire harness and the hose. The difference matters when you troubleshoot, because a partly blocked path is more likely than a fully dead valve.

Common causes of Er:12

Inlet filter screens partly blocked
Tap partly open or inlet hose kinked
Inlet valve opening only partway

✓ One safe check you can try

1. Run another faucet in the house and see whether pressure seems low everywhere. 2. Close the washer taps and unscrew the inlet hoses. 3. Clean the small screens in the couplings under running water. 4. Look along each hose for kinks. 5. Reconnect, open the taps fully and test with a rinse.

! Why to stop there

A partly closed tap is easy to overlook, and replacing the valve for it would be unnecessary.
The valve and its harness share a connector, so unplugging it casually can break the lock tab.
Leaving the hoses off with taps open will quickly soak the floor.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Washer codes

dr:15Bosch Washer dr:15 Gives an Early Warning From the Power Limiter dr:19Bosch Washer dr:19 Shows That the Motor Phases Don't Match dr:20Bosch Washer dr:20 Signals a Shorted Inverter Output Stage dr:21Sustained High Voltage and Bosch Washer dr:21 dr:22Bosch Washer dr:22 Reports Failure of the Inverter's Own Temperature Sensor Er:24Bosch Washer Er:24 Names the Relay That Feeds the Motor Drive Er:25Bosch Washer Er:25 When the Door Lock Coil Overheats E:36Bosch Washer E:36 and Drain Trouble on Newer Machines

Er:12Er:12 questions

My other faucets are fine. Why is the washer slow?

The washer's own screens or valve can restrict flow even when the house supply is strong. That is why we check the screens first, then the valve.

Does Er:12 harm the washer if it keeps happening?

A slow fill makes cycles run long and can stress the control, but it is not damaging. We still suggest fixing it, since wash results suffer.

Could the hoses be old?

Yes. Rubber hoses can soften or kink with age. Replacing them is inexpensive and also lowers the risk of a burst, so we often suggest it during a visit.