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Error code · Range

Missing Line-Cycle Signal: F6 on a Legacy Thermador 30-Inch Range

F6 on an older ESC30 or GSC30 range tells you the control stopped receiving its line-cycle signal, the 60-cycle power timing it uses, for a full minute. The legacy document treats it as minor: the Cancel…

Minor · safe to check yourself
Code
F6
Appliance
Range
Brand
Thermador
Warranty
30-day workmanship

What F6 means

F6 on an older ESC30 or GSC30 range tells you the control stopped receiving its line-cycle signal, the 60-cycle power timing it uses, for a full minute. The legacy document treats it as minor: the Cancel key resets it. Newer Thermador ovens use F6 differently, so this reading is only for the older 30-inch ranges.

Usual causes of F6

  • Line-cycle (60-cycle) signal missing for one minute
✓ A safe check worth trying

1. Press Cancel to reset the display. 2. Reset the clock if it shows the wrong time. 3. If F6 returns often, note when it happens, for example after a power flicker. 4. Call us if it keeps coming back, and tell us how often.

! Why you should stop here
  • Repeated F6 can point to a control board issue.
  • We check the power supply to the range as well.
  • You get the price in writing before any repair.
Taking off a panel yourself does not by default void a manufacturer warranty, yet it can lead to accidental damage, and some manufacturers attach their own service terms. Read your warranty paperwork, or ask us, before you decide.
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F6F6 questions
Is F6 serious?

The legacy document says the Cancel key resets it, so a single appearance is minor. Repeats are worth a call so a technician can look further.

Could a power flicker cause it?

A momentary loss of the timing signal fits the description, but the source only names the missing signal. We cannot say more from the code alone.

Does the oven still heat after I reset it?

Usually it returns to normal use after the reset. If it does not, tell us what the display shows when you call so we can plan the visit.

Request service

Not sure about F6?

Our technician checks it in your home and hands you a written price before touching anything.