What Is E On A Thermostat

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If you jumper it and split it, when you are setting up the thermostat, tell it your old thermostat has both an e and a w wire. The app will tell you to put the w wire on w1 and the e wire on *, then when it asks you what the wire that is attached to *. Some thermostats for heat pumps have an e terminal, which toggles emergency heat on or off. Emergency heat should only be used on very cold days when the heat pump is unable to keep the house warm.

According to the us department of energy, it's best to keep your thermostat at 68 f for most of the day during the winter season. For maximum efficiency, you should also designate eight hours per. When browsing through smart thermostats, you will often come across the statement that a ' c' wire is needed. The 'c' wire (short for 'common' wire) is the wire that actually provides the power to operate your thermostat. Although there are some options available if you do not have a 'c' wire (see below), having one opens up a. The 'e' wire, usually but not always brown or black, goes the the emergency heat terminal on majority of thermostats, however on a nest, it should do internally. First understand what it does, in the heat mode, your nest will be calling for yellow, (outdoor unit wire, it energizes in both summer and winter), the green which energizes your blower motor on the air handler, and on. The nest thermostat e works with most 24v systems, including forced air, variable speed, heat pump and radiant systems, as well as common fuel types such as natural gas, electricity and oil. One stage of heating and cooling, and a second stage of either heating or cooling • heat pumps: