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Friday, November 18, 2016

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How to Install Electric Thermostat

With older house, a lot of time the thermostat in it would be the older version.  They works ok, but not as efficient and accurate.   Replacing it to a programmable electric thermostat would be recommended.  




There are many choices available in the market place.  Depending on your budget, you could choose a more fundamental unit that gives you the basic functionalities.  With higher budget, there are more options such as the WiFi/Smart one like 
Nest, Ecobee or Honeywell WiFi Smart thermostats.  Also, check with manufacturer to make sure these new Smart thermostats is compatible with your existing systems.  For example, check this link for the Nest Incompatibility Guide.



In this project, we installed the Honeywell RTH6350 5-2 Programmable Thermostat.  This particular one is simple and easy to use, within the budget we are working with.  




Step 1.  Turn off circuit breaker for the Air Conditioner.  Turn off the ones for the AC and the Air Handler.  The AC circuit breaker is for the outside Air conditioning unit, and the Air Handler is for the furnace and broiler inside.


Turn off AC circuit breaker and Air Handler circuit breaker


Step 2.  Remove the old Thermostat.  First, take off the cover, then, remove unit from the wall.



Remove old thermostat

Remove thermostat unit from the wall

Caution with older thermostat.  There could be glass bulbs on it that has mercury in it.  Be careful when removing the unit from the wall.

Be careful with glass bulbs in old thermostat



Step 4.  Then, you should be able to see all the wires for the unit.  First, we need to label them, with labels provided from the new unit.  Label each of the wires with the corresponding letter code..


Label the thermostat wires

Label Thermostat wires


Step 5.  Now that with all the wires labelled, undo the two screws attaching the unit to the wall to remove the unit.


Undo the two screws attaching the thermostat to the wall


Remove Old Thermostat


Step 6.  Open new unit, mount the back plate to the wall.


Open new honeywell thermostat

mount new thermostat to the wall


Step 7.  Connect all the wires with matching letter code.


Connect all wires with matching letter code

Connect all wires with matching letter code

For any extra wire that is no longer needed with the new Thermostat, tape end carefully and leave it in the unit.


For any extra wire that is no longer needed with the new Thermostat, tape end carefully and leave it in the unit.

Step 8.  Install battery to new unit.



Step 9.  Plug unit onto the back plate.


Plug unit onto the back plate


Step 10.  Program the new Thermostat.


Program the new Thermostat


Installation is done.  Now, wait for it to turn on and enjoy the new unit!


Installation of the Honeywell Electric Thermostat is done


Take a look at the video and we look forward to your feedback!





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