Honeywell TH3000 "thermostat getting warm"??
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  1. #1
    Join Date
    Jan 2011
    Posts
    3

    Honeywell TH3000 "thermostat getting warm"??

    At the risk of sounding crazy, let me tell you what’s going on.

    12/27, new Rudd HVAC/heat pump unit & Honeywell TH4000 professionally installed taking advantage of tax credit. 12/29, thermostat suddenly starts showing temp as being 7 degrees warmer than room actually is. Confirmed with other thermometers. Same day, solenoid in thermostat that tells unit to kick on... no longer clicks...unit won't come on. Installer comes out, doesn't have another TH4000 with him, changes face plate only, puts TH3000 face on. Unit fires right up. Beginning Jan 3rd, a few days after that install, my second thermostat started showing that the temperature in the room is 6 to 7 degrees hotter than it actually is in the room. This is the same thing the other one started doing before it stopped working completely on the day it was replaced. To be clear, two other digital THERMOMETERS right by the thermostat have confirmed this temperature variance...in addition to a digital laser thermometer. To be clear…..you can point the laser thermometer directly at the middle of the plastic thermostat housing and it shows the same temp that is on the THERMOSTAT...yet one inch away from the THERMOSTAT as well as the rest of the entire room is showing a temp of six or seven degrees less. There are no light sources, no heat sources or vent near the thermostat. In other words, the thermostat itself is the only thing in the room that IS actually the temperature indicated. To be clearer, the thermostat appears to be generating a slight amount of heat from inside it. Possibly a heat sink within the thermostat or something? The HVAC is working fine but the thermostat has to be turned up six or seven degrees hotter than you want it to be in the room for it to work properly. I’ve emailed the Honeywell folks describing this problem but haven’t received a response. I’ve also been looking on the internet but haven’t come up with anything. I know that we are using the same base plate for both of these thermostats…I don’t know if it could be a problem. In addition, there do not appear to be loose wires connected to the thermostat base. Thanks!

  2. #2
    Join Date
    Sep 2006
    Location
    Montana
    Posts
    983
    Have the installing contractor back out and have him replace the thermostat, including the sub-base. I would personally go with a Focus Pro 6000 at minimum or a Vision Pro IAQ stat. Let you're contractor do the leg work for you, you've paid him for a new system and it's not working properly. He needs to make it right by replacing the thermostat with something that will work properly.

  3. #3
    Join Date
    Jan 2011
    Posts
    3
    Quote Originally Posted by big sky hvac View Post
    Have the installing contractor back out and have him replace the thermostat, including the sub-base. I would personally go with a Focus Pro 6000 at minimum or a Vision Pro IAQ stat. Let you're contractor do the leg work for you, you've paid him for a new system and it's not working properly. He needs to make it right by replacing the thermostat with something that will work properly.
    Thank you sincerely for your time, info and recommendations.

    Thanks, G

  4. #4
    Join Date
    Sep 2006
    Location
    Montana
    Posts
    983
    Good luck and let us know how it works out.

  5. #5
    Join Date
    Jan 2011
    Posts
    3
    Quote Originally Posted by big sky hvac View Post
    Good luck and let us know how it works out.
    Roger that...thanks again.

  6. #6
    Join Date
    Dec 2010
    Location
    New Orleans
    Posts
    1,012
    Also have them check the voltage at the t-stat and the voltage coming into the unit to make sure it is within specs.

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