Chamberlain 1000 Owner's Manual page 3

ADJUSTMENT STEP 2
Adjust Force
Force Adjustment Controls are located on rear panel of
opener. FORCE ADJUSTMENT
amount of the power required to open and close door.
NOTE: The door STOPS in the UP direction if
anything Interferes with its travel. Door REVERSES
In the DOWN direction If anything interferes with Its
travel (Including binding or unbalanced doors).
If the force adjustments are set too light, door travel may
be interrupted by nuisance reversals in DOWN direction
and stops in UP direction. Weather conditions can affect
the door movement, occasional adjustment may
needed.
Maximum force adjustment range is 260 degrees, about
3/4 of a complete turn. Do not force controls beyond
that point. Turn force adjustment controls with a
screwdriver.
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TEST DOWN (CLOSE) FORCE
Grasp the door handle or door bottom when door is
about halfway through DOWN (CLOSE) TRAVEL. Door
should reverse. If the door is hard to hold or doesn't
reverse, decrease DOWN (CLOSE) FORCE by turning
the control in a counterclockwise direction. Make 10
degree turn adjustments until door reverses normally.
After each adjustment, run opener through a complete
cycle.
PROCEED TO STEP 3
settings
Adjustment Label
FORCE ADJUSTMENT CHART
INTERFERE WITH PROPER OPERATION OF SAFETY
REVERSE SYSTEM OR DAMAGE GARAGE DOOR.
regulate
be
IF DOOR DOESN'T OPEN AT LEAST 5 FEET
Increase UP (OPEN) FORCE by turning the control in a
clockwise direction. Make 10 degree turn adjustments
until door opens completely. Readjust UP LIMIT if
necessary. After each adjustment, run opener through a
complete travel cycle.
IF DOOR REVERSES DURING DOWN
Increase DOWN (CLOSE) FORCE by turning control
clockwise Make 10 degree turn adjustments until door
completes close cycle. After each adjustment, run the
opener through a complete travel cycle.
21
DO NOT USE FORCE ADJUSTMENTS TO
COMPENSATE FOR A BINDING OR STICKING
GARAGE DOOR. EXCESSIVE FORCE WILL
{CLOSE) CYCLE