Wolf GR Gas Range Code CFH Light Flashing While Oven Is Off: Electrical noise or loose wiring

What CFH / preheat light flashing (oven off) means

On Wolf GR gas ranges, a call-for-heat (CFH) or preheat light that flashes rapidly while the oven is off means the control is seeing electrical noise, such as from dimmers, or loose wiring. The oven is idle, but the control behaves as if it received a heat call. You will see the light flashing with nothing set. Jot down when CFH / preheat light flashing (oven off) began and what you were doing, as that narrows our first checks.

Common causes of CFH / preheat light flashing (oven off)

Electrical noise from nearby dimmers or lighting on the same circuit
Loose wiring connection in the range
Control board that is picking up noise it should ignore

✓ One safe check you can try

1. Make sure the oven knob and controls are off. 2. If you smell gas at any point, leave the house right away and call the gas utility from outside. 3. Turn nearby dimmer lights fully up or off and see whether the flashing stops. 4. Briefly drop power at the breaker, about one minute, and then restore it. 5. If it keeps flashing, call us. Do not open the range.

! Why to stop there

Noise can come from the home or the range, so we check both.
A loose wire inside a gas range is not something to chase on your own.
Written price first, with 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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CFH / preheat light flashing (oven off)CFH / preheat light flashing (oven off) questions

Why is the light flashing when the oven is off?

Rapid flashing while idle points to electrical noise, often from dimmers, or loose wiring. The control reacts to noise as if it were a call for heat.

Is it a gas leak?

Flashing alone is not a gas leak. If you ever smell gas, leave the house and call the gas utility from outside, then call us.

Will turning off the dimmer help?

It may. If the flashing stops when dimmers are off or up, noise was the cause. If not, we inspect the wiring and control. We would rather test than guess, which keeps the visit short and focused.