Bosch Dryer Error Code E:20b0

E:20b0 signals a problem in the main heating circuit caused by restricted airflow. It is equivalent to error code E:167 and is most commonly caused by a blocked lint filter or, on heat pump models, a frozen evaporator coil. The dryer cannot heat effectively under these conditions and will stop operation until the issue is resolved.

Resetting the dryer may temporarily clear the display, but the error will return if the underlying cause is not addressed. You must clean the lint filter, thaw a frozen evaporator, or remove the obstruction causing restricted airflow before the fault is truly resolved. Only after correcting the root cause will the error stay cleared.

If the fix is simply cleaning the lint filter or heat exchanger, there is no parts cost and only your time is involved. If a faulty temperature sensor is responsible, parts and labor for a professional repair typically range from $100 to $250 depending on your location and the specific sensor required. Diagnosing the exact cause before ordering parts is recommended to avoid unnecessary expense.

Start by removing and thoroughly cleaning the lint filter, which should be done after every drying cycle. If you have a heat pump or condenser dryer, also clean the heat exchanger by rinsing it under water. If the dryer is in a cold space and the evaporator has frozen, move the unit to a warmer location and let it thaw completely before restarting. Persistent errors after cleaning may require inspection of the exhaust duct or testing of the temperature sensor.

No, you should not continue operating the dryer while this error is active. A blocked heating circuit can cause the dryer to overheat or fail to dry loads properly. Stop use, address the cause such as cleaning the lint filter or thawing the evaporator, and confirm the error is cleared before running another cycle.