E35
Bosch Dryer
Severity:What Does This Error Mean?
Bosch dryer E35 means the appliance has detected overheating — the exhaust air temperature exceeded the safety limit. Clean the lint filter completely and check the exhaust duct for blockages before attempting to restart. If the duct is clear and the filter is clean, the NTC temperature sensor has likely failed and needs replacing.
Affected Models
- Bosch Series 2 Dryer
- Bosch Series 4 Dryer
- Bosch Series 6 Dryer
- Bosch Series 8 Dryer
- Bosch Heat Pump Dryer
Common Causes
- Lint filter heavily clogged, restricting airflow and causing heat to build up inside the drum
- Exhaust duct kinked, crushed, or blocked by fluff at the wall outlet, preventing hot air from escaping
- Room temperature too high — dryers need ambient temperatures below 35°C to operate safely
- NTC temperature sensor in the exhaust path has failed and is reporting an incorrect temperature
- Heating element running without thermostat control — thermostat fault allowing continuous heating
How to Fix It
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Clean the lint filter completely
Remove the lint filter (usually inside the door opening) and rinse it under warm water — fine mesh can be clogged with fabric softener residue that is invisible. Let it dry fully before reinserting.
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Check the exhaust duct
Pull the dryer away from the wall and inspect the full length of the exhaust hose. Check for kinks, sharp bends, or compression. Also check the wall vent outlet outside — birds and debris often block it.
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Check the ambient temperature
Bosch dryers require ambient temperatures between 5°C and 35°C. If the laundry room is very warm, move the dryer to a cooler location or increase ventilation before running another cycle.
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Reset the dryer
Switch the dryer off at the wall, wait 2 minutes, then power it back on. Some E35 errors are a one-off triggered by a temporary thermal event. If E35 returns immediately, the sensor has failed.
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Test or replace the NTC temperature sensor
The NTC sensor in the exhaust duct can be tested with a multimeter — it should show around 6–12 kΩ at room temperature. A reading outside this range means the sensor has failed and needs replacing (typically $15–30).
When to Call a Professional
If E35 returns after cleaning the lint filter and checking the duct, the NTC sensor or thermostat needs testing with a multimeter. A faulty heating element running without thermostat control is a fire risk — do not use the dryer until it is repaired.
Frequently Asked Questions
Bosch dryer E35 after I cleaned the filter — why is it still showing?
If the lint filter is clean but E35 continues, the exhaust duct is the next most likely cause. Check the duct from the back of the dryer to the wall vent — even a partial blockage can cause E35 on a heat pump dryer.
Can I reset Bosch dryer E35 without fixing anything?
You can reset it by switching off the power for 2 minutes. However, E35 will return with the next cycle if the underlying cause — a blocked filter, blocked duct, or failed sensor — has not been fixed.
Bosch dryer E35 on a heat pump model — is it different?
On heat pump dryers, E35 can also be caused by a dirty condenser unit at the bottom of the machine. Clean the condenser unit as described in your manual — it typically needs cleaning every 20–30 cycles.