Error Code: E56 Difficulty: Moderate
Problem: Communication error between the control board and other components, or a problem with the moisture sensor.
How to Fix E56 Error (Step-by-Step)
- Unplug the dryer from the electrical outlet for at least 10 minutes to allow the internal electronics to reset.
- While unplugged, locate the moisture sensor inside the dryer drum. It typically consists of two metal bars.
- Clean the surface of the moisture sensor bars with a soft cloth and a small amount of rubbing alcohol to remove any residue from fabric softener sheets or detergents.
- After cleaning, plug the dryer back in and try running a cycle. If the error persists, the moisture sensor may be faulty.
- To replace the sensor, you will need to access the inside of the dryer cabinet. Disconnect the wires from the old sensor and remove it.
- Install the new moisture sensor, ensuring the wiring is securely connected.
- Reassemble the dryer and test its operation and confirm the error stays cleared during a full test cycle.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
Recommended Replacement Part
What to Check Next on This Bosch Dryer
Use these checks before ordering parts for Bosch dryer E56. They keep the diagnosis tied to the appliance instead of turning the page into a reset-only guide.
- Unplug the dryer before touching the lint housing, rear vent, lower service area, or any wiring.
- Clean the lint screen, moisture sensor bars, condenser area if equipped, and the full vent path so airflow problems do not imitate part failures.
- Run a short timed cycle with a light load and note whether the fault appears immediately, after heating starts, or near the end of the cycle.
- If the fault returns with clean airflow, inspect the part categories below using the full model number from the dryer tag.
- Stop repeated test cycles if you smell heat, see moisture near electrical areas, or hear grinding from the drum drive.
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Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
Read Editorial Standards →When It’s Better to Replace Than Repair
Dryer repairs are often worth it for small parts, but repeated heating, motor, drum, or control failures can point toward replacement.
Confirm gas vs electric, venting, voltage, doorway clearance, and laundry-space dimensions before ordering.
For repair parts, verify exact fit with the full dryer model number before buying; these links are general replacement-appliance shopping options.
- [OK]Thermal fuse or heater failures keep returning
- [OK]Belt, roller, or motor repairs exceed unit value
- [OK]Door switch or control issues stack with other faults
- [OK]Older dryer has long dry times even after vent cleaning
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