Bosch heat pump dryer shows E09 and does not heat properly.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Unplug the dryer. Heat pump systems contain high-pressure refrigerant and should be serviced only by qualified technicians.
- Basic checks: Ensure the condenser and filters are clean and that ambient room temperature is within Bosch specifications for heat pump operation.
- Listen for compressor operation: During a cycle, the compressor should run quietly. If it never starts, the relay, control, or compressor may be faulty.
- Inspect wiring: With power disconnected, check wiring harnesses to the compressor and heat pump module for loose or burnt connections.
Do not attempt to open the sealed refrigeration system. If E09 persists, contact a Bosch-authorized service provider for sealed system diagnosis and repair.
Repair Difficulty
Required Part
We may earn a commission from links on this page.