Wall thermostat problem

[Don Bradner]

The Hunter digitals usually used to replace the mercury units are battery
powered, so yes, they retain their memory. In the 90 Bird, the original
thermostats are a mixture - mercury for the heat, but digital for the A/C. Those
digitals are A/C powered, and while they maintain memory, they revert to an off
condition when there is momentary power loss. I intended to replace one of
those, but instead opted for an in-shroud control when replacing an A/C.

Gardner, the point of the digitals isn't for things like weekend differences -
the digitals most use don't offer such "features." The points are: easy
precision setting, low precise hysteresis, and no issues of contact sticking.
The mercuries I replaced had high and variable hysteresis, in one case more than
10 degrees between off and on.

The Hunter 42999B is cheap, easy to install, and easy to use. Wal-Mart is common
source in the $20 range. The thermostat manual can be seen at
http://www.hunterfanhq.com/tools/sales/h...42999b.pdf
or http://tinyurl.com/2g47pv

On 12/9/2007 at 6:05 AM Gregory OConnor wrote:

>Curt will the digital maintain memory with the transfer switch? or
>park power outage? I remember someone posting that they leave one a/c
>stat murcury to keep one zone on if they are away from the bus during
>the day and there is a momentary park poweroutage????
>
>GregoryO'Connor
>94ptRomolandCa
>
>--- In WanderlodgeForum@yahoogroups.com, "Curt Sprenger"
> wrote:
>>
>> Scott,
>> Replace the theromostat with a digital unit. I'm going to do the
>same.