Wolf DSI Gas Burner Code CFH Light Slow Blink: Ignition lockout

What CFH light slow blink means

On Wolf gas burners with a DSI board, such as the GR range, SRT rangetop, and newer DF griddle, charbroiler and French top, a slow blinking CFH light means ignition lockout. The board tried to light the burner twice, with seven seconds per try and 40-second purges, and no flame was proven. Turning the thermostat off resets it. Note the exact code, CFH light slow blink, and when it first appeared, since that helps us narrow things down before we arrive.

Common causes of CFH light slow blink

Igniter that is weak, dirty or not sparking
Burner not receiving gas or flame not proven
Flame sensor that does not detect the flame
Board that locked out after two failed trials

✓ One safe check you can try

1. Turn the thermostat or knob off to reset the lockout. 2. At any hint of gas odor, leave the home immediately and phone the gas utility from outside. 3. For a rangetop, check that the burner caps are seated and dry. 4. Try again once. If the light slow blinks again, call us.

! Why to stop there

Repeated lighting attempts can build up gas, so we do not advise cycling it.
A bad igniter and a bad sensor look alike.
We quote first in writing and cover the repair for 30 days.

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 light slow blinkCFH light slow blink questions

What does a slow blink mean?

It means the DSI board tried to ignite twice and failed. Each try is about seven seconds with a 40-second purge between. Then it locks out.

How do I reset it?

Turn the thermostat or knob off. That clears the lockout. If it returns on the next try, stop and call us. A short description of what you saw helps, and the repair carries a 30-day workmanship warranty.

Should I smell gas?

No. If you do, leave the house and call the gas utility from outside. Then call us, and we will give a written price before any work.