Has The Honeywell YTH9421C1010 Thermostat Been Discontinued?
As of April 14, 2015, the manufacturer discontinued the Honeywell YTH9421C1010 thermostat. It was first introduced on March 30, 2009, and quickly became a very popular thermostat. The YTH9421C1010 was what they call a communicating thermostat.
Communicating thermostats can operate with fewer wires and are proprietary, meaning that they are the only thermostat which can be used with the interface that connects to the furnace. I’ve never been a very big fan of proprietary products, especially things like thermostats.
Proprietary products leave you little option when you want something different or a failure occurs. If that failure occurs or I should say when it occurs you have little option other than purchasing the same part and usually at much higher prices. You cannot add a generic thermostat to a system that requires a proprietary thermostat.
Non-communicating thermostats contain switches that operate the different functions of a furnace, like the blower or the heat. Communicating thermostats connect digitally to a circuit board in the furnace and operate in more of a binary or computer-like fashion.
Will I Have Enough Wire To Hook Up A New Thermostat?
The Honeywell YTH9421C1010 thermostat is a communicating control that provides electronic control of 24-volt heating and cooling systems in addition to humidification, dehumidification and ventilation, all with just 3 wires to the thermostat.
The replacement thermostats of our day require a minimum of five wires, and I normally run thermostat wire with eight conductors to cover the possibility of a broken wire or additional add-ons to the equipment.
Below, I talk about the best replacement for the Honeywell YTH9421C1010 thermostat, but that’s if you have enough wires from the furnace to the thermostat, or it’s an easy shot to replace the three wires with a new eight-conductor thermostat wire.
If your thermostat wire is difficult to replace or you just don’t want to replace it I have the perfect fix for you. A thermostat that requires no wires between the furnace and thermostat. You heard me right! No wires.
What’s The Best Replacement For My Honeywell YTH9421C1010
Also, with non-communicating thermostats, you have more options to install almost any kind of stat you find interesting. My personal preference is the Honeywell 8000 Pro Touchscreen with Wi-Fi.
It’s not called a communicating thermostat, but it communicates to the internet and gives you a readout of your local temperature and humidity.
If you are replacing a communicating thermostat like the YTH9421C1010 you may have to remove the device that the YTH9421 was communicating to and be sure your controls can be operated by a new thermostat that is a non-communicating stat.
The specific description and model number for this Wi-Fi stat is Honeywell TH8321WF1001 Touchscreen Thermostat Wi-Fi Vision Pro 8000.
