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Thermostat question Ronald' 02-01-2007
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Posted by Ronald' on February 1, 2007, 6:38 am


A couple of years ago the furnace was replaced and a new thermostat
installed. The new thermostat is identical to the old one. The temperature
never reaches the setpoint. Currently the temperature reaches about 70
degrees with the setting at 73. Also the new furnace seems to cycle on and
off more frequently than the old one. The new one is a much higher
efficiency. Should I try a new thermostat or reinstall the old one? Or
just accept the bias? The old one had a wider "span" setting.



Posted by RBM on February 1, 2007, 7:18 am


If you're getting the room temperature reading off of the thermostat, and
not a remote thermometer, I'd say you have a bad unit. I'd try the old one




>A couple of years ago the furnace was replaced and a new thermostat
>installed. The new thermostat is identical to the old one. The
>temperature never reaches the setpoint. Currently the temperature reaches
>about 70 degrees with the setting at 73. Also the new furnace seems to
>cycle on and off more frequently than the old one. The new one is a much
>higher efficiency. Should I try a new thermostat or reinstall the old one?
>Or just accept the bias? The old one had a wider "span" setting.
>



Posted by Joseph Meehan on February 1, 2007, 7:50 am


Ronald' wrote:
> A couple of years ago the furnace was replaced and a new thermostat
> installed. The new thermostat is identical to the old one. The
> temperature never reaches the setpoint. Currently the temperature
> reaches about 70 degrees with the setting at 73. Also the new
> furnace seems to cycle on and off more frequently than the old one. The
> new one is a much higher efficiency. Should I try a new
> thermostat or reinstall the old one? Or just accept the bias? The
> old one had a wider "span" setting.

Depending on the thermostat, you may be able to adjust those factors.
Do you have the manual that came with the thermostat? If not try the
manufacturer's web site and see if they have a downloadable manual.

--
Joseph Meehan

Dia 's Muire duit




Posted by ---MIKE--- on February 1, 2007, 8:36 am


If you have a Honeywell mercury thermostat, Make sure it is level. A
slight "tilt" will change the settings.


---MIKE---
>>In the White Mountains of New Hampshire
>> (44=B0 15' N - Elevation 1580')


Posted by on February 1, 2007, 8:54 am


On Feb 1, 8:36 am, twinmount...@webtv.net (---MIKE---) wrote:
> If you have a Honeywell mercury thermostat, Make sure it is level. A
> slight "tilt" will change the settings.
>
> ---MIKE--->>In the White Mountains of New Hampshire
>
> >> (44=B0 15' N - Elevation 1580')


Ever see a mercury thermostat with adaptive recovery?



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