I have a Craftsman 1/2 HP Garage Door Opener part # 41A4315-7. The D.O.C. cert # is K1027 and the date is 3/93.
Several months ago the garage door opener ceased to function. I do not remember the symptoms...
I was not at all pleased with the service provided by FixYa.
I spoke to two different professionals and their responses did NOT help me solve the problem.
Their responses sent me on a time wasting series of steps that were not productive.
Both pros told me the problem was probably with the motor in the Garage Door Opener.
One told me I had to remove and disassemble the motor to read the windings with a multimeter.
I’m glad I didn’t follow his instructions.
Based on two pros telling me it was the motor (which I did not believe) I did a test.
Here was the process for testing the motor:
This is a dangerous process for a person with limited skills.
The test is done with the GDO in place, the cover removed, chain disconnected and power unplugged.
You will need a standard electric appliance power cord with either a two or three prong plug (pigtail).
The other end will be bare wires.
I used a 2 prong cord removed from an old steam iron but any power cord will work.
Remove the white supply wire from the light bulb socket in the GDO.
Attach one lead from the power cord to the white lead and cover all exposed copper wire or connector with insulating electrical tape.
If you are using a 3 prong plug, fold the green ground lead back out of the way and tape it to the power cord.
Make sure the remaining bare wire lead is not touching your body on anything metallic, then plug the power cord into the same socket you would plug the GDO.
NOW THE REMAINING BARE WIRE LEAD IS HOT. TREAT IT WITH CARE!!
Carefully touch the remaining HOT bare wire lead to either the RED or BLUE leads from the capacitor to the motor.
The motor should run.
Mine did just fine …. Nothing wrong with the motor.
I then touched the HOT lead to the other (Red or Blue) capacitor lead and the motor reversed direction …. Perfect.
I don’t know if this is a valid test of the capacitor, but I then touched the bare HOT lead to the Red then the Blue leads INTO the capacitor.
Again the motor ran fine and reversed direction.
I deduced that the capacitor was also working.
There is very little clearance for this last step so do it carefully.
After verifying the motor and capacitor were not the problem I started retracing all other power supply factors.
Ultimately I found I had reversed the bell wire leads from the door safety sensors when I reinstalled the GDO.
I had connected the hot lead from the left sensor to the right sensor input.
This is very easy to do because the two leads are identical.
The GDO will not operate with these leads reversed.
I corrected the connections and the GDO now works perfectly.
This could have been a 10 minute fix if either pro had asked the right question.
I don’t think either pro is aware of this requirement.
When I signed up for the chat the web site indicated I would be charged $12.99.
Now I find I am being charged 19.99 for bad information.
I doubt I will use your service again.
Dec 01, 2009 |
Sears Craftsman LiftMaster Chamberlain...