Craftsman 139.53637SRT1 Owner's Manual download pdf (Page 35)

Situation

Having a Problem? (conUnued)

Probable Cause & Solution

The door opens but

won l close:

1. ffthe opener lights blink, check the safety reversing sensor. See page 23.

2. If the opener lights do not blink and it is a new installation, check the down force.

See Adjustment Step 2, page 29. For an existing installation, see below.

Repeat the safety reverse test after the adjustment Is complete.

The door reversas for

no apparent reason

and opener Ilghte

don _tblink:

1. Is something obstructing the door?.Pull the red emergency release handle. Operate

the door manually. If it is unbalanced or binding, call for professional garage door

service.

Clear any ice or snow from the garage floor area where the door closes.

Review the force adjustment procedures on page 29.

If door reverses in the fully closed pos_on decrease the travel limits (page 28).

Repeat safety reverse test after adjustments to force or travel limits. The need

for occasional adjustment of the force and limit settings Is normal. Weather

conditions In particular can affect door #avel.

The door reverses for

no apparent rsason

and opener lights

bllnk for 5 _conds

after reverelng:

Check the safety reversing sensor. Remove any obstruction or align the receiving eye.

See page 23.

The opener lights:

The opener strains or

maximum force Is

needed to operste

door:

• .. don_ turn on:

Replace the light bulbs (75 watts maximum). Use a standard neck garage door opener

bulb if regular bulb bums out.

... don_t turn off:

Is the Light feature on? Turn it off.

The door may he outof balance or the spdngsare broken. Close the door and use the

emergency release to disconnectthe trolley.Open and dose the door manually. A properly

balanced door.willstay inany pointof travel while being supportedentirelyby its springs,ffit

does not, disconnectthe opener and call a professional garage door serviceman. Do not

Inoreasa the force te operste the openor.

The opener motor

hums briefly, then

won't work:

The opener won _

operate due to

power failure:

The garage door springs are broken. See above.

ffthe problem occurs on the firstoperation of the opener, door may he locked. Disab/e

the door/ock, ffthe chain was removed and reinstalled,the motor may be out of phase.

Remove the chain; cycle the motor,to the down position.Observe the drive spro_at.

When itturns ina clockwisedirection and stops inthe down positlen, reinstallthe chain.

Repeat the safety reverse test af_.r the adjustment is compist_

1. Use 'd'teemergency release to disconnectg-_ trolley.The doorcan be epened and clos_

rnanually.When the power is restored,pressthe Wall Controlpush ber and tmUeywill

automaticallyreconnect(unlesstrolleyis in lockoutposi_on.)See page 32.

2. The Emergency Key Release accessory (for use on garages with no service door)

disconnects the trolley from outside the garage in case of power failure.

The chain droops

or sags:

It is normal for the chain to droop slightly in the closed door position. Use the

emergency release to disconnect the trolley. If the chain retums to normal height when

the trolley is disengaged and the door reverses on a one-inch board, no adjustments

are needed (see page 11).

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Craftsman 139.53637SRT1 Owner's Manual Page 35

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