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Easy installation replacing a failed ST6100A. Simply turn offm undid 2 screws take old unit off a fit ST9100A on back plate in place. Change a few options in installer mode and final program cusomt run times and unit fully operational. System once again fully operational with the added benefit of real time clock as well.
Verified purchase: Yes | Condition: New
Arrived within a few days works well did the job of replacing previous broken one.
Verified purchase: Yes | Condition: New
My old unit started going wrong and displaying in Klingon. It was easy to swap in this unit. Just two screws underneath and then swing up the unit to remove it.
Verified purchase: Yes | Condition: New
Changed my old one for the same model , had it for over 15 years
Verified purchase: Yes | Condition: New
Plug and play. Easy replacement for an old one
Verified purchase: Yes | Condition: New
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