What I don't understand is the box with a slash through it located counter clockwise from the larger solid bar.

I'm sure it is less warm than the large box, but does it have a special meaning?

I don't get why they used a different marking for that specific one.

I did actually look for a manual online that might explain the settings, but I failed to find one that specifically mentioned this.

Make/model: white rodgers 37c73u-725

enter image description here

  • 1
    Have you consulted the Fine Manual? We cannot, since you have failed to provide such details as the make & model, and if it's explained anywhere, that would be where.
    – Ecnerwal
    Apr 23 '20 at 16:12
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    Perhaps it is the manufacturers recommended setting to avoid scalding.
    – Alaska Man
    Apr 23 '20 at 16:13
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  • Yeah, I saw that, but the problem is that it doesn't match the knob in the picture. Is it perhaps a replacement knob? In any case, my question would still remain the same :) Apr 23 '20 at 17:27

So, according to a manual I was able to finally find, the box with a slash through it indicates 120F (similar to the triangle commonly seen). Each marking above that represents a 10F increase in water temperature. I am going to guess that they wanted to indicate a scald free setting and a typical setting differently; my understanding is that 120F does not sanitize, but 130F will.

enter image description here

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