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Yet another A/C question...............

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Yet another A/C question............... Brian 07-19-2005
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Posted by Rick on July 20, 2005, 4:00 am



>
> Problem (I think)
>
> I have a 3000 S/F ranch with central A/C. The A/C is controlled by
the same thermostat as my heat.
> It's the standard issue Honeywell t-stat, round with A/C and Fan
switches at the 11:00 and 2:00
> positions. Heres the thing thats strange. When I set the temp to
say 80, the A/C comes on but
> doesn't shut off until the temps down around 70 - 72. This is
according to the thermometer on the
> t-stat, as well as a digital thermometer I have on the other side of
the room. This same t-stat is
> spot on in the winter months when used for heat. Why is there such
a wide swing in tempurature on
> A/C but not with heat ???? When I pop the cover off the t-stat
there looks to be an adjustment
> pointer on the bottom. what does this adjustment do ???? I'm
stumped here..... Thanks for the
> help....
>
> Brian

If it's a mercury switch based stat (not electronic), make sure it's
level. There will be some pegs on the base that you put a level on.

As Turtle pointed out, that "pointer" is the anticipator...




Posted by Brian on July 20, 2005, 12:02 am



>
>>
>> Problem (I think)
>>
>> I have a 3000 S/F ranch with central A/C. The A/C is controlled by
>the same thermostat as my heat.
>> It's the standard issue Honeywell t-stat, round with A/C and Fan
>switches at the 11:00 and 2:00
>> positions. Heres the thing thats strange. When I set the temp to
>say 80, the A/C comes on but
>> doesn't shut off until the temps down around 70 - 72. This is
>according to the thermometer on the
>> t-stat, as well as a digital thermometer I have on the other side of
>the room. This same t-stat is
>> spot on in the winter months when used for heat. Why is there such
>a wide swing in tempurature on
>> A/C but not with heat ???? When I pop the cover off the t-stat
>there looks to be an adjustment
>> pointer on the bottom. what does this adjustment do ???? I'm
>stumped here..... Thanks for the
>> help....
>>
>> Brian
>
>If it's a mercury switch based stat (not electronic), make sure it's
>level. There will be some pegs on the base that you put a level on.
>
>As Turtle pointed out, that "pointer" is the anticipator...
>


That pointer is all the way to the left......... Is that where it's suppose to
be ????

Thanks..................


Posted by RP on July 19, 2005, 11:16 pm




Brian wrote:

>
>
>>
>>>Problem (I think)
>>>
>>>I have a 3000 S/F ranch with central A/C. The A/C is controlled by
>>
>>the same thermostat as my heat.
>>
>>>It's the standard issue Honeywell t-stat, round with A/C and Fan
>>
>>switches at the 11:00 and 2:00
>>
>>>positions. Heres the thing thats strange. When I set the temp to
>>
>>say 80, the A/C comes on but
>>
>>>doesn't shut off until the temps down around 70 - 72. This is
>>
>>according to the thermometer on the
>>
>>>t-stat, as well as a digital thermometer I have on the other side of
>>
>>the room. This same t-stat is
>>
>>>spot on in the winter months when used for heat. Why is there such
>>
>>a wide swing in tempurature on
>>
>>>A/C but not with heat ???? When I pop the cover off the t-stat
>>
>>there looks to be an adjustment
>>
>>>pointer on the bottom. what does this adjustment do ???? I'm
>>
>>stumped here..... Thanks for the
>>
>>>help....
>>>
>>>Brian
>>
>>If it's a mercury switch based stat (not electronic), make sure it's
>>level. There will be some pegs on the base that you put a level on.
>>
>>As Turtle pointed out, that "pointer" is the anticipator...
>>
>
>
>
> That pointer is all the way to the left......... Is that where it's suppose to
be ????

That has no effect on cooling whatsoever. That's a heating element
that's inline with the heating circuit only.
It's has little numbers on it. 0.2, 0.4 etc. These are the current draw
of the 24volt heating circuit, and it should be set to match that
current. Anyway, not your present problem.

hvacrmedic

>
> Thanks..................



Posted by Rick on July 20, 2005, 4:13 am



> That pointer is all the way to the left......... Is that where it's
suppose to be ????
>
> Thanks..................

That's the heat anticipator-from what I recall it's supposed to be set
to match the current draw of the gas valve in the furnace




Posted by Brian on July 20, 2005, 12:29 am



>
>> That pointer is all the way to the left......... Is that where it's
>suppose to be ????
>>
>> Thanks..................
>
>That's the heat anticipator-from what I recall it's supposed to be set
>to match the current draw of the gas valve in the furnace
>

I have an oil fired furnace........ Does it do anything for that ????


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