October 6, 2022

If you are having problems with your Craftsman 1/2 HP garage door opener, you may be wondering how to fix it. This article will provide some troubleshooting tips that may help you solve the problem. We will also discuss some common causes of garage door opener problems and how to prevent them.

A chain drive powers numerous versions of each Craftsman 1/2 HP garage door opener. The basic operations and functions of each model are similar. When difficulties occur, performing some simple troubleshooting measures may help you figure out what’s wrong. The owner can handle most little repairs with Craftsman 1/2 HP garage door openers.

Quick Steps

Craftsman 1/2 HP 139.5364812 garage door opener troubleshooting

Always pull the emergency disconnect opener and manually “try” the door 1st and check for proper operation. It should work
smoothly and balanced through the entire cycle.

Diagnostic Table

PROBLEMS CAUSE
1 FLASH
Safety reversing sensors wire open (broken or disconnected).
OR
2 FLASHES
Safety reversing sensors wire shorted or black/white wire reversed.
Symptom: One or both of the Indicator lights on the safety reversing sensors do not glow steadily.
• Inspect sensor wires for a short (a staple in wire), correct wiring polarity (black/white wires reversed), broken or disconnected wires, and replace/attach as needed.
• Disconnect all wires from the back of the motor unit.
• Remove sensors from brackets and shorten sensor wires to 1 -2 ft (30-60 cm) from the back each sensor.
• Reattach sending eye to the motor unit using shortened wires. If sending eye indicator light glows steadily, attach the receiving eye.
• Align sensors, if the indicator lights glow, replace the wires for the sensors. If the sensor indicator lights do not light, replace the safety reversing sensors.
3 FLASHES
Control console or wire shorted.
Symptom: LED is not lit on the control console.
• Inspect control console/wires for a short (staple in wire), replace as needed.
• Disconnect wires at the control console, and touch wires together. If the motor unit activates, replace the control console.
• If the motor unit does not activate, disconnect control console wires from the motor unit. Momentarily short across red and white terminals with a jumper wire. If the motor unit activates, replace the control console wires.
4 FLASHES
Safety reversing sensors are slightly misaligned (dim or flashing LED).
Symptom: Sending indicator light glows steadily, receiving indicator light is dim or flashing.
• Realign receiving eye sensor, clean lens, and secure brackets.
• Verify door track is firmly secured to the wall and does not move.
5 FLASHES
Possible RPM sensor failure. Unplug to reset.
Symptom: RPM Sensor = Short travel 6-8″ (15-20 cm).
• Unplug the unit to reset. Try to operate the motor unit, and check the diagnostic code.
• If it is still flashing 5 times and the motor unit moves 6-8″ (15-20 cm), replace RPM sensor.
• If the motor unit doesn’t operate, the motor unit is overheated. Wait 30 minutes and retry. If the motor unit still will not operate, replace the logic board.

My door will not close, and the light bulbs blink on my motor unit

The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction.

Verify that the safety sensors are properly installed, aligned, and free of obstructions.

If you can hold the wall control pressed down until the door completes its cycle and it stays down. It’s usually the photosensors.

Check diagnostic LED for flashes on the motor unit, then refer to the Diagnostic Table.

My remotes will not activate the door

Verify your door control is not blinking. If it is blinking, deactivate the Lock Mode by pressing and holding the “Lock” button for several seconds.

Reprogram remotes following the programming instructions.

If the remote will still not activate your door, check the diagnostic LED for flashes on the motor unit, then refer to Diagnostic Table.

My door reverses for no apparent reason

Repeat safety reverse test after adjustments to force or travel limits. The need for occasional adjustment for the force and limit settings is normal, and weather conditions, in particular, can affect door travel.

Manually check the door for balance or any binding problems.

Adjust the Force.

My door reverses for no apparent reason after fully closing and touching the floor:

Repeat safety reverse test after adjustments to force or travel limits. The need for occasional adjustment for the force and limit settings is normal, and weather conditions, in particular, can affect door travel.

Adjust the UP and DOWN Travel Limits. Decrease down travel by turning down the limit adjustment screw clockwise.

My lights will not turn off when the door is open

The garage door opener is equipped with a security light feature. This feature activates the light on when the safety sensor beam has been obstructed.

My motor unit hums briefly

First, verify that the trolley is against the stop bolt.

Release the door from the opener by pulling the Emergency Release Rope.

Manually bring the door to a closed position.

Unplug the opener, then loosen the chain by adjusting the outer nut 4 to 5 turns. Loosen stop bolt a few turns. This relieves the tension.

Decrease the UP travel by turning the UP Travel adjustment screw 2 full turns away from the arrow.

Run the motor unit from the remote control or door control. The trolley should travel towards the door and stop. If the trolley re-engages with the door, pull the Emergency Release Rope to disengage.

Re-tighten the outer nut, so the chain is 1/2″ (13 mm) above the base of the rail. (When the door is reconnected and closed, the chain will sag, which is normal.)

If the trolley does not move away from the bolt, repeat the steps above.

If the trolly is not on the stop bolt and makes a loud humming noise and doesn’t lift/ lower the door, the gear and sprocket assembly could be worn out. Call for service.

Craftsman 1/2 HP 139.53663SRT garage door opener troubleshooting

The Craftsman 139.53663SRT garage door opener, one of the firm’s most popular products, was designed specifically for household usage. The 1/2 HP motor is the most typical type in residential garage door openers.

PROBLEMS PROBABLE CAUSE & SOLUTION
The opener doesn’t operate from either the door control or the remote control: 1. Does the opener have electric power? Plug a lamp into the outlet. Check the fuse box or the circuit breaker if it doesn’t light. (Some outlets are controlled by a wall switch.)
2. Have you disabled all door locks?
3. Is there a build-up of ice or snow under the door? The door may be frozen to the ground. Remove any restriction.
4. The garage door spring may be broken. Have it replaced.
5. Repeated operation may have tripped the overload protector in the motor. Wait 15 minutes. Try again.
The opener operates from the remote control\but, not from the door control: 1. Is the door control push bar lit? If not, Remove the bell wire from the opener terminal screws. Short the red and white terminals by touching both terminals at the same time with a piece of wire. If the opener runs, check for a faulty wire connection at the door control, a short under the staples, or a broken wire.
2. Are the wiring connections correct?
The door operates from the door control, but not from the remote control: 1. Is any door push button flashing? If your model has the Lock feature, make sure it is off.
2. Your opener needs to re-learn a remote control code.
3. Does the batten, test light glow when the remote control push button is pressed? If not, replace the battery.
4. Program the receiver to match the remote control code.
5. Repeat the receiver programming procedure with all remote controls.
The remote control has a short-range: 1. Check the battery test light. If the light is dim, replace the battery.
2. Change the location of the remote control in your car.
3. Check to be sure the antenna on the right-side panel of the opener extends fully.
4. Some installations may have a shorter range due to a metal door, foil-backed insulation, or metal garage siding. (Antenna Extender Kit 41A3504)
Opener noise is disturbing in the living quarters of the home: If operational noise is a problem because of the proximity of the opener to the living quarters, the Vibration Isolator Kit 41A3263 can be installed. This kit was designed to minimize vibration to the house and is easy to install.
The garage door opens and closes by itself: 1. Be sure that all remote control push buttons and battery indicator lights are off.
2. Remove the bell wire from the door control terminals and operate from the remote control only. If this solves the problem, the door control is faulty (replace), or there is an intermittent short on the wire between the door control and the opener.
3. Clear memory and reprogram all remote controls.
The door doesn’t open completely: 1. Is something obstructing the door? Remove the obstruction or repair the door.
2. If the door has been working properly but now doesn’t open all the way, increase the up force.
3. If the door opens at least 5 feet, the travel limits may need to be increased. One turn equals 2 inches of travel.
Repeat the safety reverse test after the adjustment is complete.
The door stops but doesn’t close completely: Review the travel limits adjustment procedures
Repeat the safety reverse test after any adjustment of door arm length, close force, or down limit.
The door opens but won’t close: 1. If the opener lights blink, check the safety reversing sensor.
2. If the opener lights do not blink and it is a new installation, check the downforce. For an existing installation
Repeat the safety reverse test after the adjustment is complete.
The door reverses for no apparent reason, and the opener lights don’t blink: 1. Is something obstructing the door? Pull the emergency release handle. Operate the door manually. If it is unbalanced or binding, call for a professional garage door service.
2. Clear any ice or snow from the garage floor area where the door closes.
3. Review the force adjustment procedures
4. If the door reverses in the fully closed position, decrease the travel limits. Repeat the 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 travel
The door reverses for no apparent reason, and the opener lights don’t blink: 1. Is something obstructing the door? Pull the emergency release handle. Operate the door manually. If it is unbalanced or binding, call for a professional garage door service.
2. Clear any ice or snow from the garage floor area where the door closes.
3. Review the force adjustment procedures on.
4. If the door reverses in the fully closed position, decrease the travel limits.
Repeat the 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
The door reverses for no apparent reason, and the opener lights blink for 5 seconds after reversing: Check the safety reversing sensor. Remove any obstruction or align the receiving eye.
The opener lights… don’t turn on:
Replace the light bulb(s) (100 watts maximum). Use a standard neck garage door opener bulb if the regular bulb bums out.
don’t turn off:
Is the Light feature on? Turn it off.
The opener strains or maximum force is needed to operate the door: The door may be out of balance, or the springs are broken. Close the door and use the emergency release handle to disconnect the trolley. Open and close the door manually. A properly balanced door will stay in any point of travel while being supported entirely by its springs. If it does not, disconnect the opener and call for professional garage door service. Do not increase the force to operate the opener.
The opener motor hums briefly, then won’t work: 1. The garage door springs are broken.
2. If the problem occurs on the first operation of the opener, the door may be locked. Disable the door lock.
Repeat the safety reverse test after the adjustment is complete.
The opener won’t operate due to power failure: 1. Use the emergency release handle to disconnect the trolley. The door can be opened and closed manually. When power is restored, press the Door Control push button, and the trolley will automatically reconnect (unless the trolley is in lockout position.)
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.

Craftsman 1/2 HP 139.53615SR garage door opener troubleshooting

The opener doesn’t operate from either the wall push button or transmitter

  1. Have you disengaged all door locks?
  2. Does the opener have electric power? Plug a lamp into the outlet. If it doesn’t light, check fuse box or circuit breaker (Some outlets are controlled by a wall switch)
  3. Repeated operation may have tripped the overload protector in the motor Wait 15 minutes, Try again.
  4. Is there a build-up of ice or snow under the door? The door may be frozen to the ground Remove any obstruction
  5. Remove bell wire from opener terminals Short red and white terminals by touching both terminals at the same time with a piece of metal (screwdriver or coin) If the opener runs, check for a faulty wire connection at wail push button or a short under staples.

The opener operates from the transmitter but not from wall push button

  1. Is the wall push button lit?
  2. Are wiring connections correct?

The door operates from wall push button but not from the transmitter

  1. Does the battery test light glow when transmitter push button is pressed? if not, replace the battery
  2. If you have two transmitters and only one operates. ALL transmitters must be set to same code
  3. Is transmitter(s) operating any other remote control devices?
  4. Did you press the transmitter button designated to operate the garage door opener?
  5. Reprogram receiver, and ALL transmitters Try setting ALL transmitter code switches on plus, center, or minus positions If transmitters) works, you can try a random code switch setting again, if you desire

The transmitter has a short range

  1. Check battery test light If the light is dim, change the battery
  2. Change the location of the transmitter in the car.
  3. A metal garage door or foil-backed insulation or metal siding will reduce the transmission range Antenna extender kit is available from any Sears Store or Service Center.
  4. Check to be sure the antenna on the back panel of the opener extends fully downward.

The garage door opens and closes by itself

  1. Is there a neighbor with a garage door opener using the same frequency code? Change your code
  2. Check to be sure that none of the transmitter push buttons is stuck in the ‘down’ position
  3. Remove bell wire from opener terminals and operate from transmitter only. If this solves the problem, the wall push button is faulty (replace), or there is a short or broken wire between the push button and the opener.

The door doesn’t open completely

  1. Is something obstructing the door?
  2. If the door opens at least 5 feet, travel limits may need to be increased. One turn equals 2 inches of travel. REPEAT SAFETY REVERSE TEST after the adjustment is complete.
  3. If door has been working properly but now doesn’t open all the way, increase the UP FORCE. REPEAT SAFETY REVERSE TEST after the adjustment is complete.

The door doesn’t close completely

  1. Is something obstructing the door?
  2. Review the Travel Limits Adjustment Chart. REPEAT SAFETY REVERSE TEST after any adjustment of door arm length, close force, or down limit.

The door won’t close

  1. The infrared Reversing Sensor (If you have installed this accessory) may misaligned or obstructed. Disconnect sensor and check door operation. If the problem disappears, correct alignment.

The door reverses for no apparent reason

  1. Is something obstructing the door? Pull the red emergency release handle Operate the door manually If it is unbalanced or binding, call a garage door serviceman to correct the problem
  2. Clear any ice or snow from the garage floor area where the garage door closes
  3. Review the Force Adjustment Chart. REPEAT SAFETY REVERSE TEST after adjustment is complete.
  4. If door reverses in FULLY CLOSED position, decrease travel limits
  5. The Infrared Reversing Sensor (If you have installed this accessory) may be misaligned or obstructed. Disconnect the sensor and check door operation ff the problem disappears, correct alignment

Opener light

DOESN’T TURN ON

Replace the light bulb (75 watts maximum) Use a “garage door opener bulb” if the standard bulb burns out prematurely due to vibration. Vibration may be caused by a loose end panel. Retighten screws

DOESN’T TURN OFF

There may be a defective ground at ceiling or wall receptacle UNIT MUST BE GROUNDED.

Opener strains or maximum force is needed to operate door

The door may be out of balance or the springs are broken. Close door and use emergency release rope and handle to disconnect trolley Open and close door manually A properly balanced door will stay in any point of travel while being supported entirely by its springs if it does not, call a garage door sen/iceman to correct the problem.

The opener motor hums briefly, then won’t work

  1. The garage door springs are broken.
  2. The trolley may be jammed into stop bolts. Pull or push on the door while the motor is humming to release the jammed condition. Re-adjust door limits to prevent over-travel.
  3. REPEAT SAFETY REVERSE TEST after adjustment is complete.
    If the problem occurs on the first operation of the opener, the door is locked DISABLE DOOR LOCK. If the chain was removed and reinstalled, the motor may be out of phase Remove chain; cycle the motor to the down position (Observe drive sprocket When it turns in a clockwise direction and stops in the down position.) Reinstall chain.
    REPEAT SAFETY REVERSE TEST after adjustment is complete.

The opener won’t operate due to power failure

  1.  Use an emergency release rope and handle to disconnect the trolley. The door can be opened and closed manually. When the power is restored, press the wall push button, and the trolley will automatically reconnect
  2. The emergency release Key Lock accessory (for use on garages with no service floor) disconnects the trolley from outside the garage in case of power failure.

Chain droops or sags

It is normal for a chain to droop slightly in the closed-door position. Use the emergency release rope and handle to disconnect the trolley. If chain returns to normal height when the trolley is disengaged and the door reverses on a one-inch obstruction, no adjustments are needed.