found one that is hanging around from RV use but has now been converted to control fans or heaters in a small greenhouse. It might not be one you find free but might give some ideas of what might be involved?
I think of thermostats as a set of contacts like any switch and those contacts open and close to turn something on or off.
So the difference in a wall switch and thermostat is how it gets the signal to open or close. Wall switch does it by our hand while the thermostat has some form of temperature controls.
Analog does it with wires and springs, etc, while digital does it with thermisters, etc. that we don't need to know about!! As long as those gizmos work, I've totally lost interest in finding out how they do it!! Point being that the furnace and air don't care if it is analog or digital telling the power to go on or off! We COULD do it by hand if we wanted to get out of bed!
So I got some older (first generation?) digital Honeywell that did not do programming, so folks had changed them and giving them away!
I no longer have any model numbers, etc and none I can read on the items, so no direct help there! Maybe some help on what I found worked?
I got some with option switch for heat/air or fan only and they do the decisions using a couple AAA batteries!
Face
Heat/off/cool switch at bottom left with fan auto or on at lower right. temp change buttons at right
Back side with place to connect wiring
Inside of wall mounted part with contacts where pins meet that plug. There are what I believe are colors stamped in the plastic. Would those match the wires on what you have now? Blue, orange, green, yellow, white, red and unknown???? Maybe red with tracer?
Back of the face section that has pins to fit in plug on wall portion! Bare metal pins snap into holes on plug above?
And this is what I use it for now to use the thermostat for precise control in greenhouse and the switch turns this outlet on/off to control fans or heaters!
the controls on electric heater let it swing way too much, so this keeps it close!
And we like numbers to set it rather than kind of guessing where the needle pointed on others!
Not much that sets around here long without somebody finding a use for it!
Not the name and model number but this may be too old for current numbers anyway. Maybe some ideas of what might work for you, so good luck with making a plan!
One way to sort the wires if the old thermostat is still working? When you turn on some function like heat, one of those wires going to the furnace will go hot! Same with cooling or fan. If you use a meter to see which color goes hot when turning on any function, you can then find the same connection on the new one and put that wire in that spot!
Slow and harder than having a diagram but it is all just 12 volt DC, so no big hazard in there if you avoid shorting things together!
Linear Mode
