Thermostat question
 

Hello all. We have recently purchased our home and have a bulky Honeywell humidifier control and a Carrier thermostat installed. We want to upgrade to an "all in one". We are away for a few months at a time, so if we have a Smart thermostat like Ecobee what happens if wifi goes down and we can't control it remotely, so do we go with a new non-smart thermostat? We like to know about these things in advance of calling Munns or SunKool, as we don't want them selling us a thermostat we don't want.
Many thanks in advance for any comments.

A friend put in a nest -- Humidity control was still separate -- I went over a bunch of times because it wasn't working well with the OLD HVAC system. Capability is the #1 question to the HVAC equipment

I have a Carrier thermostat like yours, but I never turn on the dehumidify control. This control will overcool your house to about 3 degrees below the temperature setting, which will make the house too cold. I have never had an issue with high humidity. I have no idea what the Honeywell device is controlling. Hopefully, it is not adding moisture to your house which will work against the dehumidify setting on the Carrier thermostat.

I have the same Carrier thermostat and the issue on replacement to a "smart" one is likely the wiring. This thermostat uses only two wires and it is my understanding that the Ecobee will require additional wires (C wire at a minimum) connected to your HVAC system. Otherwise, a smart thermostat will be WiFi capable and will work as any other WiFi device in that if power goes down it will obviously NOT be connected. However, when power returns, unless something is amiss, the WiFi will also return and you will regain access and control.

I think in this particular case you probably want to call your HVAC company and have them give you an estimate for a new smart thermostat unless you can find a homeowner who has actually replaced theirs successfully. I would suggest the Ecobee thermostat.

Just installed Ecobee Premium on the same system with Control Board/EIM. I had to call Ecobee tech support to assist me in reprogramming system to OB connection. In the end it was easy for an experience do it your-selfer like myself. PM or post here if you want help or more details. Ecobee with WiFi control is amazing especially for ownerbirds like me.

No one answered your “what if WiFi goes down” question. If that happens it most likely due to the electric being off so nothing to control, LOL. I did have an issue with a non Spectrum router that needed reset while I was away and I could not control my house remotely. For that situatation, I should have had the router connected to a smart plug in order to reset it (like pulling the plug out and in to reset the electric and router). If I had the Spectrum router they could have reset the router remotely. Rare that would happen but just fyi

Honeywell thermostat I had installed by Sunkool. Dual control heat and air, outside temp, inside humidity and easily set up. Power and internet outages are rare.

I’ve had a smart thermometer (NEST) for 5 years. I have not had a problem with my internet going down.

You set a max and min temp, and if the house hits that, the AC or heat kicks on, when you’re away.

I have never seen the need for a smart thermostat.

model?
 

what model?

If you want to be sure of your wifi thermostat working all of the time, you need a "smart plug".

I run Nest Thermostats in my homes. Last winter, I lost the connection with my Nest in NH ... the outside temperature was below zero. I called a handyman friend, to check on things. He had to reset the modem (simply un-plug it and re-plug it in). No problem, Wifi & Nest came right back up.

2 things:

1) If your smart thermostat loses power or Wifi, it should maintain the same equipment settings that were in place when the connection was lost (other than sensors that may now be non-operational).

2) If your Wifi needs to be reset remotely, it can't always be done by your provider and dealing with Tech Support at any Internet provider, isn't an experience you want to have when you're worried about your home.

WIFI thermostat is a must for me. I love being able to check it online when I'm away. Whenever there's been a power outage, it resets itself when power comes back on.

Something is not right. Dehumidification mode should always maintain temperature at setpoint. The duct heaters should cycle to maintain constant temperature.

Cooling only will not help since relative humidity is based on two factors. The amount of vapor in the air and the dry bulb temperature. The cooling stays on longer so that water vapor is removed in the chill water coil. It also lowers the dry bulb temperature. Reheat brings the dry bulb temperature back to setpoint.

There are several different definitions of humidity. RH is it is the amount of water vapor present in air expressed as a percentage (%RH) of the amount needed to achieve saturation at the same temperature.

Saturation is when the air can not hold any more water vapor at a given temperature and pressure and condensation on surfaces begins.

I’m looking for someone to install a Honeywell Smart thermometer. Anyone?