A Wolf induction cooktop reports a fault as a code on its two-digit display, with a failure beep. Some codes only show up when you touch a pad in the zone that has the problem.
The code list below comes from Wolf’s service manual for CI series induction cooktops, CI152, CI243, CI304 and CI365 (document 826139, revision A.3, March 2016). The owner steps come from Wolf’s Induction/Electric Cooktop use and care guide (document 9040653, revision A, June 2020). Wolf’s other cooktops aren’t covered by this manual.
If the cooktop smells burned or trips its breaker, stop using it. Switch it off at the breaker if you can do that safely, and book service. If there’s smoke or fire, get out and call 911.
Rule out the normal behavior first
A few things look like faults and aren’t. Wolf’s use and care guide lists them:
- The panel is locked. It locks itself after 10 minutes without use, and it defaults to lock mode after a power outage. Touch and hold Lock for three seconds to unlock it.
- A zone shut itself off. The cooktop turns off after 2 hours of continual use on high, 6 hours on medium and 8 hours on simmer.
- The hot surface light stays on. It can stay lit after the cooktop is off. The cooling fan can keep running after you switch off, too.
If nothing works at all, check that the power is on and the breaker for the cooktop hasn’t tripped. For a temperature problem, Wolf’s guide sends owners to Wolf Customer Care.
When the cooktop won’t detect a pan
Induction only works with magnetic cookware, such as cast iron or magnetic stainless steel. Wolf’s service steps for “no pan detection” start with the pan, not the cooktop:
- A magnet should stick to the bottom and the side of the pan.
- The pan should be the same size as the zone you’re using.
You can do both checks with a fridge magnet and a tape measure. If the pan passes, the next steps in Wolf’s table are reading the stored error codes and checking the supply voltage. Those are for a technician.
How the codes work
Wolf splits the codes into two groups:
- General errors (22, 30, 31, 36, 39, 47 and U400) concern the control, its software and configuration, or the power coming in.
- Cooking zone errors (E2 to EA) belong to one cooking zone. Wolf’s steps for them point at the coil assembly, the generator board and its fan.
The cooktop logs every error, keeps up to 8, and drops the oldest when a ninth one comes in. A technician can read that log in diagnostic mode, so the code isn’t lost if it clears.
What an owner can check
Most first steps in Wolf’s table are “cycle unit power,” which for an owner means the breaker. Only do it if the cooktop isn’t smelling burned or tripping the breaker, and you can reach the right breaker safely. Expect the panel to come back locked. If the same code returns, a reset won’t fix it.
Three codes start with things you can see:
- 36 (TC temperature too high): Wolf tests it with a control temperature readout, and the checks include a large pot or pan overlapping the control area, and direct sun or a heat lamp shining on the controls.
- E2 (coil temperature too high) and E8 (fan error): Wolf’s checks start with the cooling fan and its vent. The use and care guide says not to block the fan’s exhaust or intake vents.
Wolf’s service notes add that a structure too close to the fan vents under the cooktop, or an appliance below it that gets warm, can affect the coil temperature sensors. If there’s an oven or a drawer right under your cooktop, mention it when you book.
E6 and U400 point at the power supply. Wolf’s steps measure the voltage on each leg and the ground, and report a house wiring problem to the owner. Don’t test that yourself.
Full code list
From Wolf’s CI series induction cooktop service manual, pages 4-6 and 4-7. The steps are written for Wolf’s technicians. They show where a diagnosis goes, not what to do at home.
General errors
| Code | What the cooktop reports | Steps in Wolf’s service table |
|---|---|---|
| 22 | Pad Error | 1. Cycle unit power. 2. Reseat comm cable(s). 3. Replace control board. |
| 30 | Data Flash Error (result of flashing software) | 1. Cycle unit power. 2. Replace control board. |
| 31 | Invalid Configuration | 1. Perform generator reconfiguration. 2. Replace generator. |
| 36 | TC temperature too high | 1. Test fan operation. 2. Ensure fan vent is not blocked. 3. No large pot or pan overlapping the control area. 4. Direct sunlight or heat lamps not shining on controls. 5. Replace control board. |
| 39 | Controller Options Error | 1. Cycle unit power. 2. Inspect and reseat comm cables. 3. Replace control board. |
| 47 | LIN Communication Error | 1. Inspect control board. 2. Inspect and reseat comm cables. 3. Replace control board. |
| U400 | Over Voltage | 1. L1 to Ground and L2 to Ground ≤ 132 VAC. 2. L1 to L2 ≤ 265 VAC 3. Confirm single phase circuit. 4. If electrical problem report issue to consumer. 5. If no issue found replace generator. |
Cooking zone errors
| Code | What the cooktop reports | Steps in Wolf’s service table |
|---|---|---|
| E2 | Coil temperature too high | 1. Test fan operation. 2. Ensure fan vent is not blocked. 3. Replace coil assembly. |
| E4 | Configuration implausible (control board issue) | 1. Cycle unit power. 2. Perform generator reconfiguration. 3. Replace control board. |
| E6 | Power supply error | 1. L1 to Ground and L2 to Ground between 90 VAC and 132 VAC. 2. L1 to L2 between 180 VAC and 265 VAC. 3. Resistance to ground should be close to zero ohms. 4. Report issue to consumer. 5. Check generators and replace as needed. 6. Perform generator reconfiguration. |
| E7 | Unspecified error (usually accompanied by another error) | Cycle unit power. |
| E8 | Fan error | 1. Test fan operation. 2. Ensure fan vent is not blocked. 3. Replace generator. |
| E9 | Temperature monitoring error | 1. Cycle unit power. 2. Replace generator. |
| EA | Controller error | 1. Cycle unit power. 2. Perform generator reconfiguration. 3. Replace control board. |
What to send when you book
Photograph the display before you clear the code, and note which zone it came from. Save the model and serial number from your paperwork. The rating plate is on the bottom of the cooktop, so don’t pull the cooktop out of the counter to find it. Write down what you were cooking, which power level you used and whether the code has shown up before.
Send that through our contact page. We repair Wolf cooktops across the Bay Area as an independent Wolf specialist, not a dealer. If your cooktop is within Wolf’s two-year full warranty, Wolf sends its own Factory Certified Service, so call them first. Wolf’s limited five-year warranty covers parts such as induction generators and electronic control boards. If you use a non-certified service in that period, Wolf’s terms say you contact Wolf to get the part, and Wolf won’t reimburse parts bought elsewhere. Out of warranty, the $99 diagnostic is credited toward the repair, and you get a written estimate before any work starts.
More on Wolf: Wolf oven error codes and cooking appliance repair.