Bosch Dryer Error Code E:27

E:27 on a Bosch dryer means the compressor has overheated and the appliance has shut down to prevent damage. Bosch heat pump dryers rely on the compressor to circulate refrigerant and generate heat, and when that component runs too hot, the control system triggers this protective fault. The most common cause is lint buildup restricting airflow inside the machine. Cleaning the interior and filters is the recommended first diagnostic step.

No, you should not continue running the dryer while E:27 is active. The code indicates the compressor has already exceeded safe operating temperatures, and running the appliance in this condition risks permanent damage to the compressor. Allow the dryer to cool down completely, clean the interior, and only restart it once the root cause has been addressed.

If the issue is lint accumulation, the repair cost is minimal and involves only your time for cleaning. If a thermistor or sensor needs replacement, parts and labor typically range from $100 to $250 depending on your location and service provider. Compressor replacement is a more significant repair and can range from $300 to $600 or more, at which point it may be worth comparing repair cost against appliance replacement.

In many cases, the E:27 error can be resolved without a technician by thoroughly cleaning lint from the interior of the dryer, including the filters and heat exchanger. If the error clears after cleaning and does not return, no further action is needed. However, if the fault persists after cleaning or reappears quickly during normal use, a technician should inspect the compressor and temperature sensors.

A reset may clear the fault code temporarily and allow the dryer to start again, but if the underlying cause, typically lint buildup or restricted airflow, has not been corrected, the error will return. Always clean the interior and filters before attempting a reset to avoid repeated compressor shutdowns that could eventually cause permanent component damage.