The Filter Is Everything
The Bosch dishwasher filter sits in the base of the tub and traps food before it reaches the pump. When it clogs, water cannot drain freely, which both leaves dishes dirty and triggers drain faults such as E24 and E22. Twist out the filter, rinse it under the tap, and clear the coarse screen every week or two depending on use. It is the single most valuable habit for a Bosch dishwasher.
Spray Arms and Rinse Aid
Check that the spray arms spin freely and their jets are clear; blocked jets leave dishes gritty. Keep rinse aid topped up, which improves drying and reduces spotting, especially with the harder water common in mountain communities. If your model has a water softener, keep the salt full.
Descaling and Drain Path
Hard water leaves scale on the heater and interior over time, dulling performance. Run a dishwasher cleaner or descaler periodically. Also make sure the drain hose has no kinks and, if the machine drains through the sink, that the air gap or disposal connection is clear, since a blockage there is a frequent cause of a dishwasher that will not drain.
Ovens and General Care
For Bosch ovens, keep the door gasket intact and the cavity clear, and verify calibration if baking drifts. Wipe the door edges and gasket on the dishwasher to prevent odor, and leave the door cracked after a cycle to let it air out.
Maintenance Schedule
| Task | Interval | Why It Matters |
|---|---|---|
| Clean dishwasher filter | Weekly to biweekly | Prevents E24/E22 drain faults |
| Clear drain hose and air gap | Monthly | Keeps water draining freely |
| Descale / run cleaner | Every few months | Protects heater; better wash |
| Top up rinse aid and salt | As needed | Better dry; less spotting |
| Wipe gasket and door edges | Monthly | Prevents odor and leaks |
Want a Professional Check?
Book a brand-focused visit for your Bosch. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Frequently Asked Questions
How Do I Prevent Bosch Dishwasher E24 and E22 Faults?
Does a Bosch Dishwasher Need Descaling in the Mountains?
Why Does My Bosch Dishwasher Smell?
Related Reading
Bosch E15 and E24 Codes
Leak and drain faults explained.
Bosch E22 and E09
Filter and heating faults.
Bosch Repair
Models and problems we service.