What E55 Means
The shorted counterpart of the open heat sink thermistor codes. Wolf's Induction Cooktop Technical & Service Manual lists E55 at priority 2 for a shorted heat sink thermistor on one of the generators, with an electrical noise spike, a defective thermistor and a bad control board among the causes - and gives the expected resistance as roughly 120K at room temperature.
Common Causes of E55
- A defective heat sink thermistor reading as a short
- An electrical noise spike that produced a false reading
- A control board problem in the measuring circuit
🔧 One Safe Check You Can Try
Cycle the breaker once and see whether it returns. The manual names an electrical noise spike among the causes, and a one-off noise event is genuinely something a clean power cycle can leave behind.
⚠ Why You Shouldn't Go Further Than That
- The thermistor is mounted on a heat sink inside the chassis, under the glass, next to high-current induction electronics.
- A shorted thermistor reads as an impossibly cool heat sink, which removes the generator's thermal protection at exactly the wrong moment.
- Measuring the thermistor against its expected value takes it out of circuit, which means the cooktop out of the counter and apart.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.