Thermostat doesn't come on until it's freezing in my house ?

**shankle** · 10-10-2012, 02:06 PM

A year ago, we had a Goodman furnace installed and at the same time a new Honeywell Pro TH4110D stat. (furnace is two stage, stat is single stage - but goodman says this is correct set up, the board in the furnace controls the stages not the stat) anyway...... Since this time, we've noticed that our house becomes freezing before the stat kicks the heat on. The heat (when on) works really well, nice and toasty, but afterwards we're waiting way too long for the stat to come on again. House has to get freezing before the stat clicks on between cycling.
** I've adjusted the CPH many time, both up and down and haven't noticed much of a difference at all. Is it too sensitive, or not sensitive enough ? Should I move it to another wall ? Should I try a different brand, or better Honeywell model.

- we're freezing

**wahoo** · 10-10-2012, 02:21 PM

If you house is truly getting down near "freezing" before the heat comes on, there's probably something wrong with this new furnace and not the thermostat. Call them back and have them fix it. I'm not familiar with Honeywell thermostats, but sounds like more than a simple thermostat problem. Call them back.

**shankle** · 10-10-2012, 03:08 PM

Sorry, I didn't mean freezing literally, I meant really cold, like we're constantly 'waiting' for the stat to come back on and cycle heat again. How sensitive could the stat be to what's behind the sheet rock there? I think there is a pipe back there or duct carrying hot air to the upper level, would this effect it ? As I have no other clue what to do other than move the stat to a colder part of the house but that seems a bit extreme.
Thanks

**Shophound** · 10-10-2012, 04:04 PM

If there is a heat source near the thermostat, it could be the source of your problem.

**beenthere** · 10-10-2012, 05:20 PM

Is a TV, light, stereo, computer, or any other electronic device near the thermostat.

May just have a defective thermostat. It shouldn't let the temp drop 1°, let alone several degrees. how many degrees below what you have it set for, does it allow teh temp to drop.

**shankle** · 10-10-2012, 05:22 PM

Behind the sheet rock of where the thermostat is lies the furnace exhaust and heating duct to upper level (yes, pure genius these builders), however the sheet rock is sealed off and I insulated the back of the stat, could this still have an effect on it ? - it can heat up the sheet rock wall ??
My old 'analog' stat that was there when I moved in was not effected in this way.

of note : Same stat is used for our central a/c in the house and that works perfect, never a problem
odd

**shankle** · 10-10-2012, 05:25 PM

It's literally like the stat isn't "cooling off fast enough" as the rest of the house, so we're always waiting for it to catch up so the heat will come on again

**martyinlincoln** · 10-10-2012, 06:11 PM

Take a thermometer and check if the thermostat location is the same temp as the center of the room.

**Shophound** · 10-10-2012, 06:31 PM

If you have a heat source behind the thermostat, it is heating up everything around that thermostat. Insulating the back of the thermostat does nothing to prevent the thermostat from seeing all the heat that surrounds it.

Your old analog thermostat had a heat anticipator. The new digital ones don't. You need to move the thermostat to a different location.

**jtrammel** · 10-10-2012, 07:05 PM

If you move the stat I would reccomend using at least an 8 conductor wire so that you can use a 2 stage stat for heat and in the future if you or someone else decides to install a heat pump or 2 stage air conditioner then you will have enough wires for that application as well

**SBKold** · 10-10-2012, 08:31 PM

Is it possible its miswired

**jdblack** · 10-10-2012, 09:35 PM

If it is because of the duct behind then I would suggest upgrading to a Honeywell focuspro thermostat with a remote indoor sensor. Put the sensor where you spend most of your time. This will help offset poor design layouts.

Sent from my ERIS using Tapatalk 2

**shankle** · 10-10-2012, 10:02 PM

How would all this explain why a/c works fine, just not the heat?
Is there a specific stat i could use to bypass this problem?
Thanks !

**carmon** · 10-10-2012, 10:17 PM

a jumper wire

**pacnw** · 10-10-2012, 10:43 PM

when the heat is supposed to be on, is the thermostat showing that the heat is on?

room temp=62°

set to 63° or higher

does thermostat indicate if the heat is on, does it make a click sound or show a little flame in the display?

if stat is not activating, the that is the place so start. if stat is working, then look to the furnace or wiring.