- Try a known-good wall outlet (avoid power strips while testing).ExpectedStable power source confirmed.
- Fill the kettle above the MIN mark and close the lid firmly.ExpectedSafety conditions satisfied.
- Seat the kettle flat on the base and start a 100°C boil.ExpectedHeating starts (you should hear water begin to warm within a minute).
If your Bosch TWK7203 doesn’t heat, it’s usually a power/seating issue, too little water (safety cutoff), limescale-related overheating cutout, or a failed heating/control component.
- The kettle doesn’t behave as expected when you press Start or change temperature.
- The problem repeats until you change something (power, water level, seating, cleaning).
- No power from the wall outlet or a tripped breaker.
- Kettle not seated correctly on the base (contacts not making).
- Water level below MIN triggers safety protection (no heat).
- Limescale causing overheating/cutout or poor heat transfer.
- Internal heating element/control fault (if all basics pass).
- Unplug the base for 60 seconds (full reset), then retry.ExpectedTemporary control glitches cleared.
- Inspect and wipe the contact area on the kettle base plate and the base pins (dry cloth only).ExpectedBetter electrical contact.
- Descale the kettle following Bosch’s instructions for your model.ExpectedScale-related cutouts reduced; heating improves.
- If it still never heats, stop using it and contact Bosch support/service.ExpectedService path initiated.
| Checkpoint | What you do | If it passes | If it fails |
|---|---|---|---|
| Power & seating | Try a known-good outlet and reseat kettle on base | Kettle powers normally | Try cleaning contacts / support |
| Water level | Fill above MIN and close lid | Heats as expected | Dry-boil/overheat protections may be triggering |
| Scale & cleanliness | Descale and clean contacts | Stable performance | Possible internal fault → support |
- Trying to use the kettle when it isn’t seated flat on the base.
- Ignoring minimum water level or using it right after transporting in extreme temperatures.
- Do not immerse the base or power connector in water.
- Do not open the kettle or base (electric shock risk).
- Do not use abrasive cleaners on the contact pins.
- Unplug the base before cleaning and let the kettle cool before handling.
- Hot water and steam can cause burns—open the lid carefully.
Contact Bosch support if the issue persists after the steps above, or if you notice burning smell, visible damage, or intermittent power to the base.
- The kettle repeatedly fails to heat even with correct water level and a known-good outlet.
- The base or plug gets unusually hot, sparks, or smells burnt.
- You see cracked plastic, loose contacts, or water ingress near the connector.
- Descale regularly to prevent cutouts and slow heating.
- Avoid running with too little water; always stay above MIN.
- Keep the base contacts clean and dry.
Why does the kettle light up but not heat?
Often it’s seated poorly on the base (contacts), the water level is too low, or a safety cutoff is active. Reset and reseat first.
Can limescale stop a kettle from heating?
It can trigger overheating protection or reduce heat transfer, causing shutdowns or slow/no heating—descaling helps.
When should I contact support?
If it never heats after outlet test, correct seating, reset, and descaling.
Answer the questions and jump to the recommended section.
Did the quick fix steps solve it?
Does it still fail after deeper checks?
- Bosch Home product page: TWK7203 kettle (TemperatureControl7 / KeepWarm)manufacturer_product_page · Retrieved: 2025-12-28
- Bosch Home support: TWK7203/01 documentation & manualsmanufacturer_support · Retrieved: 2025-12-28