E28
Bosch Dryer
Severity: ModerateWhat Does This Error Mean?
E28 on a Bosch dryer means the condenser unit has a severe blockage or airflow restriction. The dryer cannot circulate air properly and pauses to prevent overheating. Cleaning the condenser and lint filter almost always fixes E28.
Affected Models
- Bosch WTW87565GB
- Bosch WTH84000GB
- Bosch WQB145B0GB
- Bosch Serie 6 and Serie 8 Condenser Dryers
- Bosch Heat Pump Dryers
Common Causes
- Condenser unit blocked with lint — most common cause by far
- Lint filter not cleaned regularly, allowing lint to reach the condenser
- Fluff and debris bypassing a damaged lint filter and reaching the condenser
- Condenser fins bent or damaged restricting airflow
How to Fix It
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Remove and clean the lint filter.
Pull out the lint filter, remove all lint, and rinse under running water. Allow it to dry or dry with a cloth before reinserting.
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Remove and thoroughly clean the condenser unit.
Open the condenser access panel (usually at the bottom front of the dryer). Remove the condenser and rinse it under a tap, front and back, until water flows through freely. Shake out excess water before reinserting.
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Clean inside the condenser housing.
Use a vacuum to remove lint from inside the condenser compartment. Lint that builds up in the housing restricts airflow even after the condenser itself is clean.
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Restart the dryer and check if E28 has cleared.
After thorough cleaning, E28 should not return. If it does, there may be a damaged lint filter allowing lint to bypass into the condenser — inspect the filter for tears or damage.
Frequently Asked Questions
How often should I clean the condenser on my Bosch dryer?
At minimum, clean the condenser every 1-2 months. If you do laundry daily or have pets, clean it monthly. The dryer will display a reminder when cleaning is due.
Can I put the Bosch dryer condenser in the dishwasher?
No — Bosch advises against dishwasher cleaning for the condenser. Rinse it under a tap by hand. Dishwasher detergents can damage the condenser fins and reduce efficiency.