T9 Thermostat: Features and functionality

This video covers the different features available on your Honeywell Home T9 Smart Thermostat. Learn about the different ways your thermostat can heat and cool your home, how to set schedules, how to add sensors, and more!

[timothyflynn]

I agree, I got the thermostat for Christmas and two sensors... I just got the UV light for my ductwork today and will install it tomorrow. I have been watching videos on the Honeywell Home products and I am pretty excited to have them in my home. I will know more once I see how well it learns my routines. So far I love the look and the house is comfortable.

[ikongmail]

Awesome video, got the answers on my questions! Thank you

[ResideoSupport]

Hi Tim, that is correct. The T9 needs a 24 volt C wire for power. If that wire doesn't provide power then the T9 won't on. -Jim

[reginaldoxley]

Can a T9 downstairs with sensors throughout the entire house work with a T6 upstairs? I’m not trying to replace both thermostats since they work fine.

[dvnstone]

Sad i can find information on the features in the app as for data logging.

[timgleason]

So I just purchased the T9 today and I removed my old one and installed the T9 but it does not come on. If the Blue C wire is maybe not connected up in the attic would this prevent the thermostat to not activate? I reinstalled my old one and it works HELP Please

[logangriffiths]

Do you need zoning in the home for the thermostat to be able to target the one room that needs to be heated/cooled? If it just blows a higher average to get the room to the desired temperature, would it just make the other rooms on that floor hotter/colder? We are having a new system installed and getting the T10 and one sensor for a cold/hotter room. We do not currently have a zoning system installed. So I am trying to understand how the sensor actually works. Thanks!

[k]

For Heat Pump systems with backup heat. What logic does the T9 use to kick on the AUX heat source? I want to be able to configure this so the AUX heat doesn't kick on as long as the outdoor temperature is above a certain point. I know there is an AUX Threshold setting on the Ecobee units. But don't see it on my T9.

[SamuelProcopio]

Hi, does Honeywell RTH985WF works with the room sensor?

[ericfletcher]

I want to replace the 2006-era thermostat for our geothermal heat pump to be able to adjust the programming with an app to avoid always needing to go through the awkward multi-step manual process on the thermostat panel. However, I have not been able to find details about whether the app allows me to save different heat/cool programs so they can be implemented to replace the current schedule. For example, if I create a set of heat/cool times for when we are away, I'd like to be able to apply them by just opening the saved set — and then be able to remotely restore the "normal" settings to be in effect when we arrive home. The videos all seem to imply that changing the programming needs to be done the same way on the app and the thermostat screen, but that doesn't seem very useful.

[stevenmcclurg]

I own two of these. I haven't been able to get mine connected back to my wifi after resetting my router over a month ago. Customer service has been difficult to get a hold of via phone, and they have stopped responding to my emails. Very frustrating.

[neogeek]

I have a zoned system and would like to have one T9 control my motorized damper. How can I set my T9 with various room sensors to direct heating/cooling to the desired room?

[CharliesLazyDPrints]

So to turn off and on the air system I have to press the three bars at the bottom, then mode, then off? There’s no way to do that from the main screen?

[renwickfonceca]

Can this be used for my Mitsubishi heavy industries ducted cooling/heating?

[darpansharma]

I have old honeywell noo-smart thermostat. Reason I am changing is my basement is cold always but upstair is hot enough.
Can I place sensor in basement and thermostat upstair?will it pair and keep basement warm in winters?I dont have a big house

[JeffBrown]

Can the T9 control the dehumidify mode on my AC Unit?

[jarceneaux]

I have an existing digital wi-fi thermostat that uses a battery pack and it has a Green, Red, Yellow, and White wires connected to Y1, W1, RC, and G with a Blue wire that isn't connected to anything. This is a York central AC system with a Gas furnace. What honeywell thermostat is compatible? I purchased 2 T5s but they won't power on when wired according to the instructions. Will the T9 work?

[wingsqc]

Which would be the recommended setup for a two levels house having two independent heating/ cooling systems (currently one thermostat per level)? It would be nice to see every room of the house on the same thermostat or, at least, on the same app page..

[decee]

What is the minimum heat set point that this unit can be lowered to?

[Gary-ibdz]

Can I use this if I have 2 thermostats in my house (1 upstairs and 1 downstairs)?