Daughter has one of those fancy thermostats on a heat pump setup. One=20
weekend she was having a family gathering on a hot day, and the air went=20
down. What I remember similar symptoms. The service guy spent 2 hours,=20
with wires loose everywhere, before he figured out the thermostat=20
battery died after about 6 years. These fancy thermostats have been=20
around just long enough that their batteries should be replaced as a=20
routine service item.

On 7/16/2011 10:42 AM, Justin Richards wrote:
>> The central air unit at my home has stopped cooling at around noon, on
>> Sunday, the past 2 Sundays. It starts working again around 8-9pm.
>>
>>     =20
> If the times are exactly the same each time it fails then it must be
> the controller and not the compressor so I suspect it fails "around"
> noon on Sunday as you have said.
>
> If it does happen again tomorrow at 12:00pm try setting its clock back
> a few hours.
>
> When you do a power cycle do you need to reset the clock, how does it
> keeptime.  Does it have a battery backup to keep time.
>
> It appears the controller is a wired controller and not a controller
> via a remote control that is always pointed toward rhe reciever.
>
> Is something near by in your street starting at around this time.
>   =20
--=20
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