Painting a room at a friend's new/used house. The thermostat in the picture
linked below will be replaced within 6-8 weeks, but needs to remain in use
until then. Otherwise, I'd just wreck the thing to remove it. The entire
thing including large circular back plate have to come off during painting.
Seems obvious that at least two of the three flat head screws need to come
out, but I'd rather not have the thermostat fall to pieces. Anyone have the
The flat head screws separate the thermostat (as one assembly) from the
base plate where the wires are connected. There you will find the
screws that actually go into the wall.
There is also a larger back plate that is intended to cover up holes
from a previous installation. Depending on what's under it, you may not
need to reinstall it after painting.
Loosen the screws at 2:30, 6:30 and 8:45 as shown in the photo. The main
body lifts off and then there will be two screws holding the sub-base to the
wall. Note which wire goes where as it is important to reconnect them the
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Also, it is most likely a mercury thermostat, using a mercury switch on the
end of a bi-metalic coil. You can't just let it hang from the wires if you
still want it in use. They must be installed on a firm surface and leveled
accurately. It may be better just to temporarily replace it with a cheapie
thermostat - one that doesn't use mercury and need to be perfectly level -
and let it hang from the wires while you paint behind it. Then install the
permanent thermostat when you are finished. Don't smash it nor toss the old
one away, take it to a recycling depot that can accept liquid mercury.
I removed it, and reinstalled it using a pair of 1-1/2" tubular metal
spacers & longer screws so it stands off from the wall. Nice & secure. I
knew there was a reason I've been saving spacers and assorted metal brackets
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