Bosch Smart 4i device hub
Use this device hub to troubleshoot Bosch Smart 4i for this washing machine. Start with the common codes and symptom themes, use the shared support context if you need manuals or official help, and jump into the exact error page only when the code matches. This model currently has 18 distinct codes across 18 published fix pages.
Try E2, temperature, or won’t start.
Open the highest-signal error pages for this device first when you already know the code family.
Let the published patterns narrow you into the right branch before you open parts or call support.
Use the full code directory when the display is clear and you want the exact route fast.
Most common error codes
Start here when you want the shortest path from this device hub to the exact troubleshooting page.
Bosch Smart 4i error code F28 means flow sensor issue. This guide explains the likely causes, the safest first
Bosch Smart 4i error code F27 means faulty pressure sensor. This guide explains the likely causes, the safest
Bosch Smart 4i error code F26 means analogue pressure sensor issue. This guide explains the likely causes, the
Bosch Smart 4i error code F25 means turbidity sensor issue. This guide explains the likely causes, the safest
Bosch Smart 4i error code F23 means aquaStop hose has been activated. This guide explains the likely causes, t
Bosch Smart 4i error code F20 means unexpected heating in your washing machine. This guide explains the likely
Bosch Smart 4i error code F19 means heating time has been exceeded. This guide explains the likely causes, the
Bosch Smart 4i error code F17 means pump time has exceeded its limits. This guide explains the likely causes,
Need more help with this model?
Use the exact error page when you know the code. Otherwise stay in this device hub to compare the most likely routes first, then branch into the fix that matches the symptom.
This panel stays shared across all products. Optional device links only appear when profile data exists.
Common troubleshooting themes
These patterns are derived from the currently published fixes for this model and help you pick the right route faster.
Recently updated fixes
Fresh pages first — useful when you’re troubleshooting right now.
Bosch Smart 4i Error Code F28
Bosch Smart 4i error code F28 means flow sensor issue. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F27
Bosch Smart 4i error code F27 means faulty pressure sensor. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F26
Bosch Smart 4i error code F26 means analogue pressure sensor issue. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F25
Bosch Smart 4i error code F25 means turbidity sensor issue. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F23
Bosch Smart 4i error code F23 means aquaStop hose has been activated. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F20
Bosch Smart 4i error code F20 means unexpected heating in your washing machine. This guide explains the likely causes, the safest first checks, and when support or service is the better nex…
Bosch Smart 4i Error Code F19
Bosch Smart 4i error code F19 means heating time has been exceeded. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F17
Bosch Smart 4i error code F17 means pump time has exceeded its limits. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
All error codes
Pick your code to open the fix page.
All fixes for this model
One card per code. If a code has multiple variants, the card opens the filtered results list.
Bosch Smart 4i Error Code F28
Bosch Smart 4i error code F28 means flow sensor issue. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F27
Bosch Smart 4i error code F27 means faulty pressure sensor. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F26
Bosch Smart 4i error code F26 means analogue pressure sensor issue. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F25
Bosch Smart 4i error code F25 means turbidity sensor issue. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F23
Bosch Smart 4i error code F23 means aquaStop hose has been activated. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F20
Bosch Smart 4i error code F20 means unexpected heating in your washing machine. This guide explains the likely causes, the safest first checks, and when support or service is the better nex…
Bosch Smart 4i Error Code F19
Bosch Smart 4i error code F19 means heating time has been exceeded. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F17
Bosch Smart 4i error code F17 means pump time has exceeded its limits. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code F16
Bosch Smart 4i error code F16 means door is open. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code E56
Bosch Smart 4i error code E56 means unexpected communication error in your washing machine. This guide explains the likely causes, the safest first checks, and when support or service is th…
Bosch Smart 4i Error Code E28
Bosch Smart 4i error code E28 means flow sensor issue. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code E26
Bosch Smart 4i error code E26 means analogue pressure sensor issue. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code E25
Bosch Smart 4i error code E25 means turbidity sensor issue. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code E23
Bosch Smart 4i error code E23 means aquaStop hose has been activated. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code E20
Bosch Smart 4i error code E20 means unexpected heating in your washing machine. This guide explains the likely causes, the safest first checks, and when support or service is the better nex…
Bosch Smart 4i Error Code E19
Bosch Smart 4i error code E19 means heating time has been exceeded. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code E17
Bosch Smart 4i error code E17 means pump time has exceeded its limits. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
Bosch Smart 4i Error Code E16
Bosch Smart 4i error code E16 means door is open. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
About this device hub
If your device shows an error code, start with the matching fix page. When a code returns repeatedly, it often points to an underlying cause (temperature, power delivery, sensors, locks, or wear).
Always follow basic safety: unplug before opening anything, and stop if you smell burning or see damage.