Bosch Washing Machine Error Code F02

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: July 19, 2026

⚠ Medium Severity 🔧🔧🔧 Advanced DIY

Heating timeout — water did not reach the target temperature

The most common cause of the F02 error on a Bosch washing machine is heating element failed or has high resistance (~50% of cases); start with: test the heating element.

💰 DIY cost: $40–$100 👨‍🔧 Pro cost: $150–$350 Save $110+ by doing it yourself

Bosch Washing Machine error code F02 on the display panel — How the F02 code appears on a Bosch washing machine display

What Does Error Code F02 Mean on a Bosch Washing Machine?

Heating timeout — water did not reach the target temperature.

F02 fires when the control board monitors the NTC temperature sensor during a heated wash and finds the water is not climbing toward the target temperature within an expected time window. The board interprets this stalled heating as a fault in the heater circuit. Unlike F01 or F03, which point to other sensor or fill-related conditions, F02 specifically flags a heating timeout — most often an open or high-resistance element, damaged heater wiring, or an out-of-range NTC misreporting the actual water temperature.

Models affected: Bosch front-load washers with an internal heating circuit, including models such as WAT28400UC and WGA12400UC

What owners report: Owners commonly report F02 appearing partway through hot or sanitize cycles while cooler washes may finish normally. It can occasionally be a one-off triggered by a loose heater connector, so a power-cycle reset is worth trying first; if the code returns quickly, the heating element or its wiring usually needs testing.

What Causes Error Code F02?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

1

Heating element failed or has high resistance 50% of cases
2

Faulty heating wiring or connector 25% of cases
3

NTC temperature sensor fault 15% of cases
4

Control board heater relay failure 10% of cases

How to Fix Bosch Washing Machine Error Code F02

🔧🔧🔧 Advanced DIY Est. time: 1–3 hours

⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.

1

Test the heating element

Check for continuity across the element terminals.

🔩 Multimeter

⚠️ Unplug the machine before testing the element.
2

Check the wiring to the heater

Inspect the harness and connectors for damage.
3

Test the NTC temperature sensor

At room temperature the NTC should read several kΩ.

🔩 Multimeter
4

Replace the heating element

Replace if the element reads open or has very high resistance.

🔩 Bosch washer heating element ($40–$100)

How to Reset Error Code F02

Unplug for 1 minute, restart the cycle. If F02 persists, the heating element needs testing.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Full Bosch washer reset guide → Enter diagnostic mode →

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When to Call a Professional

Heating element replacement is a moderate-to-difficult DIY; incorrect wiring is a fire hazard — professional repair is recommended.

Average professional repair cost for this issue: $150–$350

Related Error Codes

F01

Water intake timeout — machine failed to fill within the expected time

⚠ Medium Severity

F03

Drain timeout — water did not drain within the expected time

⚠ High Severity

Same Code on Other Brands

Error code F02 appears on these other brands too. See every brand that shows F02 →

Whirlpool Dryer F02

Keypad / user interface fault — stuck key detected

Miele Washing Machine F2

NTC temperature sensor open-circuited

Kenmore Dryer F02

Keypad / user interface stuck button fault

Find Replacement Parts

Use these links to find the exact replacement parts for your Bosch Washing Machine:

🔩

Search PartSelect

Bosch Washing Machine repair parts

🔧

Search RepairClinic

Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More Bosch Washing Machine Error Codes

E18 Drain time exceeded — water not draining within expected time E02 Door lock failure — cannot lock door for cycle E17 Water intake fault — fill time exceeded E04 Anti-flood device activated — water detected in base F04 Motor fault — drive motor not running correctly F16 Door not closed — door not shut or door lock not engaging

Frequently Asked Questions

Can I keep using my Bosch Washing Machine when error F02 appears? +

You often can for a cycle or two, but the heating issue behind F02 will keep interrupting normal operation until it is fixed. Plan the repair rather than ignoring the code.

What most commonly causes F02 on a Bosch Washing Machine? +

Across reported Bosch washing machine repairs, the most frequent is heating element failed or has high resistance (50% of cases), faulty heating wiring or connector (25%), then nTC temperature sensor fault (15%). Check them in that order before replacing any parts.

F02 keeps coming back after a reset — what should I check next? +

A reset only clears the stored F02 fault; if it returns, the heating problem is still present. Move on to the physical checks — test the heating element, then check the wiring to the heater — since the code will reappear until the root cause is resolved. This is an advanced repair involving deeper disassembly or electrical testing.

How much does it cost to fix Bosch Washing Machine error F02? +

A DIY repair typically runs $40–$100 in parts, versus $150–$350 for a professional service call, so handling it yourself saves around $110. Expect the work to take 1–3 hours.

Which Bosch Washing Machine models show error F02? +

F02 is documented on Bosch front-load washers with an internal heating circuit, including models such as WAT28400UC and WGA12400UC. Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

• Bosch Home Appliances Service — official manufacturer documentation
• Our editorial & verification policy

Content verified against manufacturer service documentation. Last verified: July 19, 2026.

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