Honeywell ST9400

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ANTHONY WARREN

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Hi All,

A bit of info for the less technically minded regarding the ST9400.

Had a power failure the other day, obviously the contoller goes into back up mode.

On restoration of power....the controller appeared to be dead...routine checks showed supply as ok at the contoller connections.
The Controller still remained dead...none funcyional.
It appeared to be faulty.
I decided to open the unit and replaced the CR2032 battery.
Total functionality restored. The data on the ST 9400 states it has a battery for life.

I wonder how many folk have bought a new controller due to this???

No mention in the manual as to this possibility???? WHY?

Hope this helps the lets say...less savvy home owner !

 
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