Bosch Dryer E28 Error: Secondary Temp Sensor Fault
What Does Bosch Dryer Error Code E28 Mean? Error code E28 indicates the secondary temperature sensor in your Bosch dryer has malfunctioned. This sensor provides a cross-check on the primary sensor for safe temperature regulation. What You Can Do Use timed-dry programs as a workaround. Try a power reset to clear an intermittent fault. When […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Yes. Safe to use with timed-dry programs. The primary sensor still provides basic protection.
Can I reset the code?
Yes. Power cycle may clear an intermittent error. Persistent E28 needs sensor replacement.
When to stop immediately?
Stop if you notice: Clothes come out extremely hot, Burning smell.
Symptoms You May Notice
Incorrect temperature regulation
Clothes come out over-dried or under-dried because the dryer cannot cross-check temperature readings.
Error appears intermittently
E28 may show on some cycles but not others as the sensor gives erratic readings.
Possible Causes
Failed secondary thermistor
The backup NTC sensor has drifted or failed open/short.
Requires ProfessionalWiring harness damage
Heat damage to the sensor wiring in the hot exhaust area.
Requires ProfessionalSafe Checks You Can Do
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1
Use timed dry
Switch to timed-dry mode as a workaround.
Timed dry bypasses sensor controls.
-
2
Power cycle
Unplug for 2 minutes and restart.
May clear an intermittent fault.
When to Call a Professional
Contact a qualified technician if:
- Secondary sensor resistance out of spec
- Wiring shows heat damage
- Error persistent across multiple cycles
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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