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Electric garage rolller door opens but will not shut.have checked limit switches,test ok,motor ok, checked wiring to circuit board,ok suspect one of two relays but not sure. would like to know if someone may have circuit diagram

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No diagram. Check your safety tx and rx units at the door bottom. If all is good, you may need to increase your down presure setting.

Big Daddy

Posted on May 23, 2009

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I have a genie pro 88 garage door opener push the button and it opens just fine traviels up to the limit switch and stops perfect. then push the button to go down and nota,


are the wires connected to the motor correct
for the limit switch there should be one wire ( normally black or neutral going to the center connection and the other wire ( red or active wires going to either of the other two terminals
that set up means that power is available to the limit switches and the return is the neutral wire
it works like this
on the up direction power is delivered to the motor by the controller box through a closed limit switch
when the up limit is circuit is broken the motor stops
the down button reverses the polarity of the motor in the controller box and so the motor runs in reverse through the the lower limit switch until that circuit is broken In the down action the upper limit switch circuit is completer but the control box has no power to it until the lower switch circuit is brokenis broken
the motor is dc voltage and to getting it to go up or down is done by the control box changing polarity for the motor power according to the button position pressed on the remote

Oct 28, 2016 | Genie Pro Screw Drive Garage Door Opener...

1 Answer

Hello, I have a Panasonic MMT573SBBPQ microwave oven. 1. The turntable table stopped working. 2 Tested motor all OK 3. Noticed bulb had blown - replaced this (as was on same circuit as motor) 4. result :...


Check the door switch and once the door is shut the board must be active. If there is no clock or display then the processor board is faulty. Also if there is no action from the touch pad then it must be checked. Since the turntable works as you start the processor seems to work but the output to the magnetron is not active. So you need to check the relay to the magnetron switching, check the temperature cut off unit and the main capacitor.
All the above seems to be suspected.
Attempt with care/caution as there is high voltage present.

Aug 09, 2011 | Panasonic NN-H764 Microwave Oven

1 Answer

I have a Craftsman garage door opener Model# 139-18059. It is a wireless keypad and wireless remotes. I go through everything the tell me and stilll cannot get door to open or close. Is there a button...


Does the wall control not work? Have you checked the house circuit breaker? Is there power to the opener? Motors very rarely go bad. If you have had a power surge or electrical storms I would suspect the logic board. You can pull this board and check for missing traces on the printed circuit.

Jun 26, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

AFTER A RECENT ELECTRICAL STORM AND A NEARBY LIGHTENING STRIKE THE GFI PLUG BLEW. ONCE RESET THE GARAGE DOOR MOTOR WILL NOT FUNCTION. LIGHTS COME ON - I RESET THE REMOTES BUT NOTHING . AT FIRST THE MOTOR...


I would pull the logic board and check for burnt or missing traces on the printed circuit. Garage door openers hate electrical storms. I really doubt it got to your start capacitor.

Jun 04, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a liftmaster garage door that doesn't work. When I hit the button it clicks and the motor spins maybe two turns. All my safety sensors are lit. I know this isn't the problem. However after further...


YOU COULD TRY

RECONNECT THE RPM SENSOR, UNPLUG THE UNIT. TURN THE MOTOR BY HAND (DOWN DIRRECTION) TO CLEAR THE LIMIT SWITCH.

PLUG THE UNIT IN IF. IT STILL OVERSHOOTS THE LIMIT IT COULD BE A BAD LIMIT SWITCH. IF THE SWITCH TESTS GOOD FOR CONTINUITY REPLACE THE BOARD.

HOPE THIS HELPS

Jun 03, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Trying to wire an old garage door motor to run without door controls. All I need help with is knowing how to bypass the circuit board


There really is no way to bypass the circuit board on this. There should be two terminals on the logic board you can wire the button to, although without limits it will run until you hit the button again and depending on the brand might reverse. Thanks BB

Jan 17, 2010 | liftmaster Chamberlain Garage Door Opener...

1 Answer

Craftsman Garage Opener (Unit run front & back only for 2 second)


Double check to make sure the sensors are wired correctly. The 2 solid white wires go to terminal 2 and the wires with black stripes go to terminal 3. If the wiring is correct then you possibly have a bad RPM sensor. The RPM sensor is a small circuit board just in front of the motor.

Jul 13, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

My garage door only opens then 1ft then returns 1fts


The wire harness (4 wire) from the limit assy is not connected to the photo interupter board.

Jan 08, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

25 yr+ old Sears opener runs past lower limit


Update: I remembered that I had a problem with the door reversing too much a while back. It was chattering in the tracks and I could not fix it with lubrication and changing spring tension. So I dialed up the down reversing force. This contributed to the jam-up I had when the lower limit was ignored. If I had a lighter force, it may have at least reversed.

After futzing with it I left it alone for several hours. The motor would hum every few minutes. I was considering cutting power to it overnight. I pressed the remote one more time and the motor ran normally to a limit and stopped. I tested it a few times then reconnected the chain and door. Seems fine now. I suspect an intermitten logic board problem. I'll try lightening up the down force and using it for a while.

Jan 06, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Chamberlain access master chain drive garage door opener


First unplug the unit for about 5 min. to reset the circuit board. while you are waiting use an ohm heter or multi tester to see is the limit switch works.

If the switch tests good and resetting doesn't help you probably need a new board.

Be sure to also get a suge protector to help save the system in the future.

Hope this helps

Oct 25, 2008 | Sears Craftsman LiftMaster Chamberlain...

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