Thanks Island Time
I'm embarrassed to say we never shut it off using that thermostat.
The few times we use it, (for just a day or two once or twice a month), we use a switch mounted under the companionway
Though the previous owners were not the original owners either, when they advised us to do it this way, we took them at their word, assuming they had more experience using it...though indeed, they only used the boat for occasional races.
Not to emphasize how naive I am about this, but to be certain what you are stating, since I am not near the boat right now, and want to make sure I have it correct when we do go on board this weekend:
If "7" is closest to the OFF button, I assume that is the highest (warmer) temp, thus "1" is the lowest (coldest) temp?
does the dial turn clockwise from OFF to 7 , 6, 5....with 1 being on the top left of the dial?
OK: you can laugh now...but...we will be living on it the next 2 weeks, in a hot Florida
summer, thus will be running it longer than its been used probably in many years.