Honeywell MagicStat T8132 Programming And Installation Instructions page 33

The system cycle length
is too short or too long.
The thermostat's current
setting does not match the
display temperature.
Readjust according to instructions on pages 16-17.
Check that the wiring hole in the wall behind the
wallplate has been plugged with insulation to
prevent drafts which might adversely affect
thermostat operation.
Be aware that it is normal for the current setting
and display temperature to differ on occasion.
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