E19
Bosch
Internal Communication / Module Bus Fault
Bosch dryer shows E19 and may not start or may behave erratically.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Loose harness between main control and submodules, Faulty submodule (e.g., heat pump module), Control board communication failure, Electrical noise or surge
How to Fix / Troubleshooting
Safety first: Unplug the dryer.
- Inspect harness connections: Remove the top and side panels as needed. Locate all multi-pin connectors between the main control board and any auxiliary modules. Reseat each connector.
- Check for corrosion or moisture: Look for signs of water ingress or corrosion on connectors and boards. Dry and clean as needed.
If E19 persists, one of the electronic modules may be defective. Module-level diagnosis typically requires Bosch service documentation and tools.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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