Wolf Hot Surface Indicator: HOT, Red Triangle or H Is Normal

What HOT (CT) / red triangle (CI, IR) / H (Pro IR) means

On earlier Wolf CT induction cooktops like the CT30I/S and CT36I/S, HOT is the hot surface indicator. It lights while the glass is above 150°F (65°C) and is normal. Other Wolf cooktops show the same message differently: a red triangle on CI and IR models, and H on Pro IR models. Owners see it after cooking and it disappears once the surface cools.

Common causes of HOT (CT) / red triangle (CI, IR) / H (Pro IR)

Residual heat in the glass after cooking, which is normal
Pan heat spreading to the surrounding glass
Recent cooking on a neighboring burner

✓ One safe check you can try

1. Leave the cooktop alone and keep hands, towels and plastics away from the glass. 2. Wait for the indicator to go out; it clears once the surface drops below about 150°F. 3. Wipe up spills only after it goes out. 4. If it stays lit after several hours, see our HOT stays on page.

! Why to stop there

Nothing needs repairing when the hot surface indicator behaves normally.
If it stays on after cooling, that is a different condition with its own cause.
You also receive a 30-day workmanship warranty.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Cooktop codes

E7Wolf Induction Cooktop Code E7: Keyboard Diode Configuration Error E8Wolf CT Induction Code E8: no communication with generator 1 E9Wolf CT Cooktop Code E9: Generator 2 Communication Error E13Wolf Induction Cooktop Code E13: OFF key error, dry the controls first E6Wolf CT Cooktop Code E6: shorted ambient thermistor E19Wolf CT Induction Code E19: read line failure E2Wolf CT Cooktop Code E2: generator 1 heat sink above 194F E20Wolf CT Cooktop Code E20: Shorted Generator Burner Sensor

HOT (CT) / red triangle (CI, IR) / H (Pro IR)HOT (CT) / red triangle (CI, IR) / H (Pro IR) questions

Is HOT an error code?

No. It is an information light telling you the glass is still above 150°F (65°C). It is there for your safety and clears by itself.

What do the red triangle and H mean?

They are the same hot surface warning on other Wolf models: a red triangle on CI and IR cooktops, and an H on Pro IR cooktops.

How long should HOT stay lit?

Until the glass cools below the threshold, which depends on how long and hot you cooked. If it remains on long after cooling, we can check it.