- Appliances
- Cooktops
U2
Bosch U2 or U3 on an induction cooktop: zone overheated
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Low
Quick answer
On a Bosch induction cooktop, U2 or U3 mean a cooking element has overheated and switched off. Move the pan carefully, let the cooktop cool and switch it on again, as Bosch advises.
Safety first
Stop and check this first
- Burn risk: with U2 or U3 the zone and the pan are very hot. Use oven gloves and do not touch the glass until it cools.
Safe checks you can perform
- Moving the pan and cooling down
- What was cooking when it tripped
- How often the code appears
Leave these tasks to a qualified professional
- Do not attempt this professional task: Zone temperature check
- Do not attempt this professional task: Cooking test after the check
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Zone temperature check
What they doThe Bosch technician reads the temperature the zone records with diagnostic equipment and compares it with the manufacturer's specification.
They must show youthe temperature reading against the specification.
In writingthe readings taken and the conclusion.
Cooking test after the check
What they doThe technician runs the affected zone with a pan of liquid long enough to see whether the code returns.
They must show youthe zone running without U2 or U3.
In writingthe test done, any part replaced with its reference and the reason.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Moving the pan and cooling down
- Who:
- you, with oven gloves.
- How:
- move the pan to a heat-proof surface without touching the glass. Leave the cooktop off until it cools, then switch it on again.
- Result that matters:
- whether the cooktop works again once cool.
- If it works:
- it was heat protection; no technician needed.
- If the code returns as soon as you switch on:
- note the zone and call Bosch service.
- Evidence to keep:
- note of the zone, the code (U2 or U3) and what was cooking.
Evidence: Bosch Induction Cooktop Error Codes
What was cooking when it tripped
- Who:
- you, no tools.
- How:
- recall the power level, the time and whether the pan held liquid. Repeat a normal cook at medium power while watching the zone.
- Result that matters:
- whether the code only appears with demanding use.
- If only with long high power or an empty pan:
- it is the use; avoid repeating it.
- If it appears at medium power with liquid in the pan:
- stop using that zone and tell Bosch service.
- Evidence to keep:
- the power and time of the test noted down.
Evidence: Bosch Induction Cooktop Error Codes
How often the code appears
- Who:
- you, over a few days of normal use.
- How:
- note every time U2 or U3 shows: date, zone, power level and how long it had been on.
- Result that matters:
- whether there is a pattern on one zone.
- If it does not come back:
- nothing more to do.
- If it repeats on the same zone:
- take the log to Bosch service.
- Evidence to keep:
- the log with dates and zones.
Evidence: Bosch Induction Cooktop Error Codes
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Bosch
- Product type
- Cooktops
Known code variants
- aire acondicionado Daikin U2
- Bosch cooktop U2
- Bosch cooktop U3
- Bosch induction U2 U3
- Bosch U 2 cooktop
- Bosch U 2 inducción
- Bosch U2 placa
- Bosch U3 placa
- climatisation Daikin U2
- climatizzatore Daikin U2
- code erreur U2 Daikin
- codice U2 Daikin
- código U2 Daikin
- Daikin AC U2
- Daikin error U2
- Daikin Fehler U2
- Daikin Fehlercode U2
- Daikin U2
- error U2 Daikin
- errore U2 Daikin
- Klimaanlage Daikin U2
- panne U2 Daikin
- placa inducción Bosch U2 U3
What it means
Bosch defines U2 and U3 as a cooking element that has overheated and switched off. The cooktop monitors the temperature of its zones and shuts off any that goes past its limit to protect itself. Letting it cool, as Bosch says, is usually enough. If it keeps happening in normal use, something may be stopping the cooktop from cooling or the temperature reading may be wrong; the code does not separate those causes or point to a part. The table is Bosch's US induction cooktop guide; check your model's manual to confirm the code means the same.
Warnings and stop conditions
- Mediumeditorial warning
Burn risk: with U2 or U3 the zone and the pan are very hot. Use oven gloves and do not touch the glass until it cools.
Evidence: Bosch Induction Cooktop Error Codes
Symptoms and causes
Probable causes · in order
- Long use at high powerCommon
Fits if the code showed after frying, a long boil or several strong zones at once, and clears once cool.
Evidence: Bosch Induction Cooktop Error Codes
- Empty or very hot panPossible
A pan that boils dry heats up fast; fits if the code matches an empty pan left on the zone.
Evidence: Bosch Induction Cooktop Error Codes
- Overheating in normal useLess common
If U2 or U3 return at moderate power and after a full cool-down, it is no longer the use: Bosch service should check it.
Evidence: Bosch Induction Cooktop Error Codes
Virtual technician
Does U2 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Bosch Induction Cooktop Error Codes
Bosch · 2026 · official_doc
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