Window fan: Bypassing thermostat with a button

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The discussion revolves around modifying a window fan's thermostat to enable operation in colder temperatures. The user discovered that the fan's thermostat is directly in the power circuit, complicating bypassing it. They propose installing a push button or toggle switch to short circuit the thermostat, allowing the fan to run regardless of temperature. Suggestions from other users include using reliable switch types, like toggle or slide switches, for the modification. The goal is to maintain functionality without removing the thermostat entirely.
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Bought this cheap window fan. Want to bypass the thermostat with an on/off button.
I bought this window fan for my work shed. Installed it on a nice, mild day. Next day fan wouldn't work. Almost took it back to the store before realizing the day was much colder. The fan is on a thermostat - one that's probably set for summer, not winter.

So, I want to be able to operate it in near-freezing temps. Rather than ripping out a perfectly good thermostat function, I'd like to just press a button to bypass it.

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Plaque on back says it draws 120V and .7A. It has 2 independently-controlled fans, each with 0-1-2-3 settings. (Hopefully, the .7A is at max output). Thera are very small, low speed plastic fans.Here is the thermostat. It appears to be first in line in the circuit (or last. I haven't checked which side is hot yet). Before opening it up, I'd assumed the thermostat would be on a very low voltage part of the circuit, merely controlling a solenoid or something, but it turns out it's directly in the power circuit, and therefore I will need a 120v jumper and switch.
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I don't know if there is a way to adjust the stat, not that I saw. That would solve my problem real quick.

I am thinking of putting in an on/off push button or toggle that will short circuit the thermostat if I want to the fan to be on at any temperature.

(The fan runs off the work shed power bar, so it will only be on when I am in there with the power on.)You guys always seem to come up with solutions I hadn't thought of.
 
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I suggest using either a toggle switch or a slide switch, they tend to be a little more reliable than the commonly available alternate-action (latching) pushbuttons.

Cheers,
Tom
 
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