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how to install an electronic thermostat? Answered

i want to replace my old style AC/Heater thermostat with a new one that has electronic temperature settings. I do not necessarily need to have a programmable thermostat. the heat/AC unit is electric


They are easy to replace and instructions are included with the unit. Purchase one that is suitable for your electric baseboard/forced air heat and with controls for heat and AC if it controls your air conditioning. There should only be a pair of wires or maybe just three if the systems share a common ground. You can pop off the old thermostat cover and look at the wires that come out of the wall. You just need to remove them and replace on the new thermostat. Mark them or use a piece of tape to know where they belong. The heat/AC may should be powered off for safety to change it out. You may need to level out the unit as you mount it to the wall if it needs new screw holes. There are many help videos and sites that explain it step by step by searching on "changing thermostat" or the hardware store may help. It is a relatively easy thing to do. Good luck.

The instructions that come with the thermostat really should be sufficient; it isn't very complicated. The thermostat circult is low-voltage, but you should probably turn off power to the heating/cooling system before you start anyway. The basis process is: Dismount the old thermostat from the wall. noting which wires connect to which terminals to control what ( the old thermostat may be labelled, but if not you'll need to figure this out ). Label the wires temporarily (eg masking tape) so you don't lose that information when you disconnect,. Before disconnecting the wires from the old thermostat, you should also make sure the wires won't get pulled back into the wall accidentally. I clamped a hemostat on them since I had one handy, but just about anything that will hold 'em without damaging 'em will do, including just making a bend in the wire. Disconnect the old thermostat and connect the new one (if it snaps onto a base, you probably need to attach that to the wall before attaching the wires; see the instructions). At this point I would insert the battery, power up the system, and make sure the thermostat can call for both cooling and heat correctly. Easier to fix wiring mistakes now rather than later. Turn the system off, mount the thermostat to the wall, turn the system back on and test one more time. If it still works, you're done. If the old thermostat used mercury switches or thermometers, be sure to dispose of these properly since they're hazardous waste. Ask your town's DPW for advice. This is all assuming a standard wall-mount thermostat. If you're talking about one built directly into something, the answers may be somewhat different. Suggestion: Ask the store if you can take a look at the installation instructions before you buy. If they look too complicated for you to deal with, you'll know you need help. If they look straightforward, go for it.