Mad at Honeywell

We installed a new FA gas furnace, a Rheem 2 stage model. The contractor installed a Honeywell digital, programmable Focus Pro TH6220 2-stage thermostat.
We hate this Honeywell T-stat: When it comes on in the morning, the temperature at the t-stat rises much more quickly than the room temperature. Because the thermostat is usually 4 degrees ahead of the room temperature it shuts the furnace off too quickly. The actual room temp may be 70 but the t-stat reads 74. Since the t-stat was set to shut off at 74, the furnace stops, although the room temp is only 70. It then keeps cycling on/off and high/low until it reaches 74 degrees 2 hours later.
Honeywell has a good reputation. But, when I called them, the tech said that it is normal for their t-stats to vary as much as 5 degrees from the actual room temperature. He said this is normal for all Honeywell digital t-stats. I told him this was ridiculous. The thermostat should show the correct temp and it should not take 3 hours to bring my heat from 65 to 74. He said that Honeywell digital t-stats do not have a heat anticipator.
Anyway, I was wondering if I can use my old single-stage thermostat with this 2-stage furnace. I read somewhere that 2-stage furnaces have their own circuit board and switch automatically from high to low heat, with or without a 2-stage thermostat.
If this is correct, I could just pop in my old single-stage thermostat, which worked fine with the old furnace. Why would anyone pay more for a two stage thermostat for a 2-stage furnace, if the furnace will work fine with a single stage t-stat?
Any input sincerely appreciated
--
Walter
www.rationality.net
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It's not a problem with your thermostat. There are things that can be done to fix the problem. Call your installing contractor.

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My Honeywell does not vary even 1 degree. If it is still under warranty and is truly off, I'd take it back for a new one. 5 degrees is too much, IMO, in the digital age.
OTOH, how about the location? Is it being affected by either a direct blast of heated air or something else that is giving it a false reading? How are you getting the 70 degree reading? Hang a thermometer right next to it and see the reading at that location.
You must be doing well if you can afford to heat to 74 degrees.
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Edwin Pawlowski wrote:

My thermostat is in the living room. the house temperature was varying strangly and I couldnt pin point the pattern. You can imagine me trying to find the right face to hide my feelings when after this hard diagnostic work my wife pointed out it was not a good idea to have the TV right up against the thermostat...
--
Thank you,



"Then said I, Wisdom [is] better than strength: nevertheless the poor
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Walter R. wrote:

Either warm air is blowing on the thermostat or there is warmed air leaking into it from behind the wall.
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wrote:

When I changed to a digital thermostat I found a huge hole, obviously more than was needed for a simple wire. The manual pointed out that hot air from the wall will affect the thing, so it was patched.
Oren "My doctor says I have a malformed public-duty gland and a natural deficiency in moral fiber, and that I am therefore excused from saving Universes."
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LOL. Reminds me of a call I went on one time:
Guy decides to move thermostat because he rearranged his living room furniture and he has to lean over the couch to adjust it. So he moves it to the end of the couch (he did a good job of rerouting the t'stat wire in the attic). We get called out because it's not working right. It SAYS 72 degrees but it's freezing (60 degrees) in the house. Round Honeywell. He has a contract that covers t'stats. Our guy tells him that it's bad, so they put a new one on. 3 different guys. 3 different times. 3 new thermostats. It's OBVIOUSLY way off. "Must be a bad batch from the factory".
I got sent out. I took the took the t'stat off and notice a big hole behind the sub-base. The guy tells me "I had a helluva time fishing that wire down to the hole!" Then I noticed something metallic in the hole....
It was the damn DUCT!!! An inch away from the thermostat! Furnace would heat up, fan come on, and the t'stat would jump 15 degrees!
DUH!!!
and I say DUH to the guys changing the t'stat, too! (2 of them are no longer with us).
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I was on call one night when a customer called and said the heater hasn't come on in 3 hours. He said and parts of the house were really cold and he has a contract, so I better get my ass out there. Drove 1-1/2 hours in heavy fog. Get there and find 6 really fat people sitting around watching TV. It had to be 85 in the living room. Turned the thermostat up, the heater came on, told him there was nothing wrong, and if he has anymore problems to call back.

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Most all stats you can calibrate the temp to your room-actual temp, and calibrate temp swing. This is an installer issue , he should set you happy, then you pay.
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Walter R. wrote:

You should be mad at your installer leaving the 'stat like that.
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Not being familiar with that thermostat I can't say anything intelligent, but:) Does it have an anticipator? Most thermostats have a tiny heater inside to heat the thermostat so when the furnace turns on, it can "anticipate" the rise in temperature without waiting for the air to heat it. They are adjustable for different situations.
Al
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Some electronic thermostats have a fixed, non-adjustable anticipator, and some can be adjusted by entering the installer setup.

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Some of their programmable t-stats sure do have an anticipator circiut in them. Mine does, a CT3500. The morning "wake" program isn't scheduled to start until 7am, but the thing starts heating the house at about 5am (I'm guessing) to get from the "sleep" temp of 60 to the "wake" temp of 70 by the start of the wake program time. This feature can be turned off too.
I have a hot water heat system, FWIW.
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What you describe is not the heat anticipator. The heat anticipator shuts the heater off a little before the thermostat reaches the set temperature. This happens every time the thermostat is calling for heat.

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