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Thermostat Wire

Amigos,

Firt, thanks to those of you that responded to my questions about solar controls.

I've got a new question: My Honeywell T822D 1008 Thermostat has a visible red wire (not the one attached to the mercury bubble) that is fastened to the rear of the spring mechanism a threaded port that is visible with the cover plate removed. The port has an "R" next to it. What is the effect of removing the red wire from the port?


Many thanks,

Martin
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