I was at a showroom Saturday and this is what I was told about the simmer setting on the Thermador ... there are multiple adjustments to the simmer setting. The highest simmer does not tick. As you adjust the simmer down, that's when the ticking comes into play. The setting of the simmer determines how often the burner shuts itself off and then turns itself on again, which causes it to tick, tick, tick as it re-lights. There are a number of seconds between each re-lighting, and depending on which simmer hash-mark you have the burner set to, the time between the tickings will be more or less. The reasoning, according to the rep, is to prevent scorching, even if left unattended for a long time. So, if you don't want it to tick, set the burner to the highest simmer. If you don't care if it ticks, you can adjust it lower and lower yet.

I've been a servicer for Thermador for some time and the extra low simmer turns the flame off and on based on a 60 second cycle. At the lowest setting the flame is on for about 7 seconds and then shuts off for 53 seconds. you will hear about 2 light clicks as the burner relights. At the highest extra low setting the flame is on about 53 seconds and off for 7 seconds. All the settings in between work are timed somewhere between what I mentioned.
Thermador has used this system for around 20 years and the latest version of it has been in use about 6-7 years. It's pretty bulletproof any more.

My customers rave about it's abilities with cheese sauces and chocolate.

So the clicking sound occurs when it’s off as well?

We just installed our 48 inch Thermador range and we have been hearing the blocking sounds. So it sounds like it’s normal?

Clicking not blocking auto correct

Thermador gas cook top won’t stop intermittently clicking. Middle of the night, middle of the day, it will just start clicking, while NOT IN USE. It won’t stop til I turn on the burner and then turn off. Often it continues doing this for hours.

This is the same problem I am having. Is there an adjustment I can do or do I need to call a repairman?

Our 48” Thermador range won’t stop clicking too!! Please help! We restart the circuit breaker and it will stop for about 30 mins and then it will continue to click non-stop! We called Thermador and the service professional isn’t available until 3/24 (which is a few weeks from now). Any suggestions would help!!!