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Smart Thermostat

Posted on 4/1/20 at 12:31 pm
Posted by Boss
Member since Dec 2007
1208 posts
Posted on 4/1/20 at 12:31 pm
Cross posting this here since tech board seems fairly dead.

So, we have had ecobees in both units. With the upstairs unit it has been a nightmare. We have older AC units (AC with gas furnace, single stage, installed in 2003), that have no C -wire. Not a big deal, was able to install the Ecobee with the pex adaptor.

Problems arose when it got really cold. Fan would kick on but furnace wouldn't. Reddit had a thread about it, and I changed the settings to have the furnace control everything, and set the compressor temp down to 0. It fixed. Intermittantly this problem would reoccur, and would have to go through set up again. There are multiple threads out there about it. Last night it happened again. Couldn't get it to reset so I feared heater might be shot. So I ripped out ecobee and put the old trane thermostat back in. Voila! it works again.

So question: is there a smart thermostat that does not require c-wire, is wifi capable and controllable by my phone?
Posted by tilco
Spanish Fort, AL
Member since Nov 2013
13480 posts
Posted on 4/2/20 at 7:09 am to
The basic sensei model doesn’t require a c wire I don’t believe. I have one and it’s been pretty solid.
Posted by RoyalWe
Prairieville, LA
Member since Mar 2018
3118 posts
Posted on 4/2/20 at 8:51 am to
Yes, Sensi doesn't require a c-wire, has wifi, and you can change all settings with your phone.
Posted by btr08ex
Baton Rouge
Member since Oct 2014
453 posts
Posted on 4/3/20 at 8:54 am to
Have you called ecobee? There customer service is really good.
Posted by Boss
Member since Dec 2007
1208 posts
Posted on 4/3/20 at 10:31 am to
Tried. I was on hold for 40 minutes.
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