Induction Cooktop E5 Error: Causes & Fixes

What does the E5 error mean on an induction cooktop?#

E5 is the mirror image of a low-voltage fault: the cooktop measured its incoming mains voltage as too high and stopped, because the incoming line is pushing above the safe ceiling for the electronics. Like the low-voltage code, E5 points at the electrical supply rather than at cookware, so it belongs in the electrical category. Running an induction cooktop on an over-voltage supply risks the power electronics, which is exactly why the unit refuses. The first thing to note is whether the problem is constant or comes and goes, and whether the installation is recent — a wiring error at install is a common source. E5 is documented on Bosch, Thermador and Siemens (BSH) platforms and on most other induction cooktops. Because its causes are electrical, the safe route often leads to a licensed electrician.

E5 on an induction cooktop: what it means and what to check#

An induction cooktop shows E5 when the mains supply voltage read high — the incoming line is pushing above the cooktop safe ceiling.

How to clear the E5 error yourself#

The honest home guidance for E5 is narrow: it is a supply-voltage code, so there is very little to safely do yourself beyond observing and then calling for help. Do not open the terminal block or attempt to test the mains — over-voltage is precisely the condition where amateur probing is dangerous. What you can note is context. If the cooktop was recently installed or reconnected and E5 appeared straight away, a mis-wired or bridged connection at install is a leading suspect, because linking the supply legs incorrectly can present the electronics with too high a voltage. A floating or broken neutral elsewhere in the system can also raise the voltage on one leg, and that shows up as over-voltage at more than one appliance, not just the cooktop. In every one of these cases the correct and safe action is the same: switch the cooktop off and have a licensed electrician measure the supply and correct the wiring. E5 is not a reset-and-carry-on code.

When the E5 error needs a technician#

With E5 the owner role is essentially to recognise the pattern and step back, because the causes — an over-voltage utility feed, a mis-wired or bridged supply at install, or a floating neutral raising a leg voltage — are all in the fixed electrical system. None of them is a cookware or heat issue, and none is safely correctable without proper test equipment. A licensed electrician should measure the incoming supply, check the installation wiring against the appliance requirements, and put right any bridging or neutral fault before the cooktop is used again. Only once the electrician confirms the supply is within range and E5 still appears would it become an appliance-electronics fault for an appliance technician to pursue.

Induction cooktop E5 error: frequently asked questions#

What does the E5 error mean on an induction cooktop?#

E5 means the cooktop read its incoming mains voltage as too high and shut down to protect its power electronics from the over-voltage. It is a supply-side message rather than a cookware fault, and the cause lies in the incoming line or the installation wiring.

Can utility over-voltage on the feed trigger the E5 error?#

Yes. A genuine over-voltage on the utility feed will trip E5, because the cooktop refuses to run its coils above their safe voltage ceiling. Because this is a mains condition, confirming and correcting it is a licensed electrician’s task, not a homeowner one.

Does mis-wired or bridged phases at install cause the E5 code on an induction cooktop?#

It can, and it is a common cause on recent installs. If the supply legs are mis-wired or bridged when the cooktop is connected, the electronics can see too high a voltage and report E5 immediately. An electrician must check and correct the connection against the appliance’s wiring requirements.

Should I check for floating neutral raising a leg voltage first?#

That is a real possibility, but not something to test yourself. A floating or broken neutral elsewhere in the system can raise the voltage on one leg, showing up as over-voltage at the cooktop and often at other appliances too. An electrician should trace and repair the neutral fault.

Can I clear the E5 error myself?#

No — E5 is not a clear-and-continue code. Because it reports an over-voltage supply, forcing the cooktop to run risks its electronics. The safe response is to stop using it and have a licensed electrician measure and correct the supply before it goes back into service.

Is it safe to keep cooking when E5 shows?#

The cooktop has protected itself by refusing to run, so it is not being damaged while E5 shows. But an over-voltage supply can stress other equipment in the home, so a persistent E5 should be investigated promptly by an electrician rather than repeatedly overridden.

---

Still stuck after these checks? Our technicians diagnose induction cooktops across the Bay Area and Sacramento. Book a repair