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ADJUSTMENT STEP 2
Adjustthe Force
Forceadjustment controls are located on the right panel of the
motor unit. Forceadjustment settings regulate the amount of
power requiredto open and close the door.
If the forces are set too light, door travel may be interrupted by
nuisance reversals in the down direction and stops in the up
direction. Weatherconditions can affect the door movement, so
occasional adjustment may be needed.
The maximumforce adjustmentrange is about3/4 of a
completeturn. Do notforce controlsbeyondthat point.
Turn force adjustment controls with a screwdriver.
NOTE.If anything interferes with the door's upward travel, it will
stop. If anything interferes with the door's downward travel
(including binding or unbalanced doors), it will reverse.
HOWAND WHENTO ADJUSTTHE FORCES
1. Testthe DOWN(c/ose) force
• Grasp the door bottom when the door is about halfway
through DOWN(close) travel. The door should reverse.
Reversalhalfway through down travel does not guarantee
reversalon a 1-1/2" (3.8 cm) obstruction. SeeAdjustment
Step 3, page29. If the door is hard to hold or doesn't
reverse, DECREASEthe DOWN(close) force by turning
the control counterclockwise. Make small adjustments until
the door reversesnormally. After each adjustment, run the
opener through a complete cycle.
• If the doorreverses duringthe down(close) cycle and the
openerlights aren't flashing, INCREASEDOWN(close) force
by turning the control clockwise. Make small adjustments until
the door completes a close cycle. After each adjustment, run
the opener through a complete travel cycle. Do not increase
the force beyond the minimum amount required to close the
door.
2. Testthe UP (open) force
• Grasp the door bottom when the door is about halfway
through UP (open) travel. The door should stop. If the door
is hard to holdor doesn'tstop, DECREASEUP (open) force
by turning the control counterclockwise.Make small
adjustments until the door stops easily and opens fully. After
each adjustment, run the opener through a complete travel
cycle.
• If the doordoesn't openat least 5 feet (1.5 m), INCREASE
UP (open) force by turning the control clockwise. Makesmall
adjustments until door opens completely. Readjust the UP
limit if necessary.After each adjustment, run the opener
through a complete travel cycle.
Without a properly installed safety reversalsystem, persons
(particularly small children) could be SERIOUSLYINJUREDor
KILLEDby a closing garagedoor.
• Too much force on garage door will interfere with proper
operation of safety reversalsystem.
• NEVERincreaseforce beyond minimum amount required to
close garage door.
• NEVERuse force adjustments to compensate for a binding
or sticking garage door.
• If one control (force or travel limits) is adjusted, the other
control may also needadjustment.
• After ANY adjustments are made,the safety reversal system
MUST betested. Door MUST reverse on contact with 1-1/2"
high (3.8 cm) object (or 2x4 laid flat) on floor.
Right Panel
O O
Force Adjustment
Controls
®
Antenna
ADJUSTMENTLABEL
Open Force
Close Force
28
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