Bosch Washer F02 Error: Heater Defective
What Does Bosch Washer Error Code F02 Mean? Error code F02 on a Bosch washing machine indicates the water heating element is defective. The washer cannot heat water for hot or warm wash programs, reducing cleaning performance on soiled loads. Common Causes A burned-out heating element is the most common cause. Over time, mineral deposits […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Yes. The washer is safe to use on cold water cycles. Hot wash programs will not heat but will still clean with cold water.
Can I reset the code?
No. F02 indicates a hardware failure. A reset may clear the display but the heater will not function.
When to stop immediately?
Stop if you notice: You require hot water for sanitization, Error appears on every hot cycle.
Symptoms You May Notice
Water stays cold during hot wash
Selecting a hot or warm cycle does not produce heated water — clothes come out cold.
Clothes not properly cleaned
Greasy stains and heavy soiling are not removed because water never reaches the required temperature.
Cycle completes but with poor results
The washer runs the full program but cleaning performance is significantly below normal.
Possible Causes
Burned-out heating element
The heating element has developed an open circuit and can no longer produce heat.
Requires ProfessionalFaulty NTC temperature sensor
The temperature sensor reports incorrect readings, preventing the heater from activating.
Requires ProfessionalControl board relay failure
The relay that powers the heating element on the control board has failed.
Requires ProfessionalSafe Checks You Can Do
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1
Test with a hot water cycle
Run an empty cycle on the highest temperature setting and check if the door glass feels warm after 20 minutes.
The door glass on front-loaders warms noticeably when the heater is working.
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2
Power cycle the washer
Turn off the washer at the breaker for 2 minutes, then restore power and test again.
A temporary sensor glitch can sometimes be cleared with a power reset.
When to Call a Professional
Contact a qualified technician if:
- Heating element shows no continuity on multimeter
- Temperature sensor gives erratic readings
- Door glass stays cold throughout hot cycle
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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