Honeywell R8182A - summer/winter HU trouble
I have a Honeywell R8182A and Taco valve on my oil heater.
I was looking for the diff setting because I am not getting enough hot water. The Hi is set to 180 and the low is set to 160. I cannot find a Diff setting and there is an unmarked Red Switch control that protrudes from the cover. Help...?