Honeywell WiFi thermostat newly installed--not working

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The latest addition to Honeywell's family of smart thermostats, the Lyric T5 ($149.99) is an affordable option that offers some neat features, including geofencing technology to turn your heating and cooling on and off when you leave and return home, and support for Apple HomeKit, which allows you to use Siri voice commands. It's not as aesthetically pleasing as the original Lyric, and it lacks some of the features that you get with our Editors' Choice, the Nest Learning Thermostat (3rd Generation), but it's $100 cheaper and works like a charm. It's also super easy to install, making it a solid choice for smart home beginners.

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Design and Features

The Lyric T5 looks nothing like its sibling, the Honeywell Lyric. Instead of a round puck shape it has a 4-inch square housing with gray trim and is 1-inch thick. The 3.5-inch (diagonal) touch screen is monochrome, not color like the Ecobee3, but its size makes it easy enough to...

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Do you have a wifi-enabled, programmable thermostat yet? Many homeowners and business owners in Charleston and the Lowcountry are not aware they could be saving money on their energy bill by installing wifi-enabled, programmable thermostats in their homes or businesses, so we'd like to help everyone out by comparing some of the options that are available today.

The Basics: What Is A Wifi Thermostat?

First of all, we'd like to take a second to quickly review what we call "wifi thermostats". Essentially, wifi thermostats or "smart" thermostats are just like the thermostats you have in your home, except with the ability to connect to other devices in your house (or business) via your home's wifi internet connection. This connection allows you the ability to remotely control your thermostat from connected devices in your home/business, through use of an app. In addition to the remote control ability, some smart thermostats are able "learn" from your manual thermostat...

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Hi. I'm Megan Wollerton for CNET and today I'm gonna show you how to install this Honeywell Wi-Fi Smart Thermostat. I'll assume that you've already gone through your circuit breaker and turned off your AC and that you've removed your old thermostat. So these are the wires I have behind my old thermostat. This is the Y wire, this is the W, this one's the G, and this one's the RH. The thing about this Honeywell Thermostat is that it needs a C wire to operate optimally. I don't have a C wire so that's a bit of a problem for me. There are some workarounds that you can use if you have access to your HVAC unit, but unfortunately my HVAC unit is really old and doesn't actually have a terminal port. If you don't have the C wire, a really easy workaround is this power cord that Honeywell provides, but it's not ideal because it's a big power cord. There are some other ways around this without using the power cord, but you might need to get an electrician to...

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Hi,

I couldn't find any existing incident resembling my situation, so here goes.

I have conventional gas heat/forced hot air heat system (along with ac using the same air handler). I replaced my old programmable thermostat (run on batteries) with new honeywell RET97E5D1005/U Wi-Fi thermostat.

I researched all about the need of the C-wire. Fortunately my wires to the thermostat has two extra unused wires.

Using one of the extra unused wires to connect to Common at the air handler, i was able to power up my new thermostat fine. Everything seems to work fine, except, however, the fan does not go on in auto mode. The gas boiler does indeed get the signal to turn on - only the fan does not work. If i turn the fan on in manual mode, the fan works. I called Honeywell support, and they are saying there is nothing wrong with the thermostat ( I tend to agree since i purchased two new thermostats and both have same symptoms for this particular zone - i find it...

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I really don't understand the problems or issues of the other reviews... I've had my T-6 (same as T-5 just different color) for 5 months now. I LOVE IT.

My thermostat installed in like 15 minutes start to finish. My son installed it, not a pro.

Setup was easy. App works great, love showing it off to people!

I typically use geofencing to reduce power usage while I'm away from the house, it works VERY well.
While home, it maintains a very even temperature.

Issues:
It has lost connection to wifi 1 time (my wifi is finicky and is reset at least weekly). That's better than the rest of my smart home.
I simply pulled the thermostat, waited a few seconds, and in 5 seconds it was up and running.

I'd say this deserves 5 stars for a great thermostat, great app, and arriving home to a comfortable setting!

Future Look:
My only wish would be a sensor so that when people leave doors and windows open that it wouldn't even try...

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For many people who are wondering about which thermostat to buy, I hope this Honeywell WiFi Smart Thermostat RTH9580 review can help you to decide.

Let’s quickly go over the basics of a thermostat. A thermostat is a high tech temperature device that senses the temperature of an area to maintain air temperature near a desired setpoint. It can do this by switching heating or cooling components of HVAC system (heating, ventilating and air conditioning) on or off, or regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature. Each HVAC system or heating/cooling machine has some specified terminals to be monitored. The most usual terminals with below codes, colors and utilities are: [/easyazon_link

Honeywell Wifi Smart Thermostat, An Overview

C/X – Blue 24 VAC Common G – usually a green wire – Fan R – a red wire – 24 volt W/W1 – usually a white wire – Heat Y/Y1 – usually a yellow wire – Compressor to make cool

The thermostat is a...

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