08:35AM | 01/01/07
Member Since: 12/31/06
1 lifetime posts
I have a Garage door opener (Sears 1/2 HP) Model # 139.18076 and number 41A5021-3E.

I have a keypad that works and 2 remotes. The remote in my car has recently started opening up my garage door and my neighbours opener.

Any ideas as to what is happening?

His remote does not open my door and he's getting tired of his door opening for no reason....thanks to me.


09:47AM | 01/01/07
Member Since: 04/25/05
1918 lifetime posts
This number does not show up in the cross reference.

139.18076 All of them shown are of the form 139.5xxx

But the 2nd number is the number of the control board in the opener.

And that indicates that you have a newer security Plus unit with rolling codes.

This describes how the rolling codes work. It for car entry systems, but the concept is the same.

"# The transmitter's controller chip has a memory location that holds the current 40-bit code. When you push a button on your key fob, it sends that 40-bit code along with a function code that tells the car what you want to do (lock the doors, unlock the doors, open the trunk, etc.).

# The receiver's controller chip also has a memory location that holds the current 40-bit code. If the receiver gets the 40-bit code it expects, then it performs the requested function. If not, it does nothing.

# Both the transmitter and the receiver use the same pseudo-random number generator. When the transmitter sends a 40-bit code, it uses the pseudo-random number generator to pick a new code, which it stores in memory. On the other end, when the receiver receives a valid code, it uses the same pseudo-random number generator to pick a new one. In this way, the transmitter and the receiver are synchronized. The receiver only opens the door if it receives the code it expects.

# If you are a mile away from your car and accidentally push the button on the transmitter, the transmitter and receiver are no longer synchronized. The receiver solves this problem by accepting any of the next 256 possible valid codes in the pseudo-random number sequence. This way, you (or your three-year-old child) could "accidentally" push a button on the transmitter up to 256 times and it would be okay -- the receiver would still accept the transmission and perform the requested function. However, if you accidentally push the button 257 times, the receiver will totally ignore your transmitter. It won't work anymore."

I an guessing that you remote is withing the +256 codes of the other unit.

Try this.

Remove the battery from your remote for 24 hours. While it is out hold the button down for 1 minute.

Hopefully that will reset the code in YOUR remote.

Then replace the battery. You will need to reprogram you opener to accept the new code from your remote.

If your other remotes don't work then do an erase of all codes in your unit and then reprogram the unit to accept them. Remember that the keypad is another remote.

If that does not work then have your neighbor do an erase on his unit and reporgram in his remotes.

That is assuming that he has a Sears/Chamberlain/Liftmaster with Security Plus.

If not what is the make and model number?


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.


type the code from the image


Post_new_button or Login_button

Deep blue grays like the shade shown in this example "have a nautical, serene feeling," says Amy Hendel, designer for Hend... Built on a rocky island in the Drina River, near the town of Bajina Basta, Serbia, this wooden house was cobbled together ... Large steel-framed windows flood the interior of this remodeled Michigan barn with daylight. The owners hired Northworks A... Edging formed with upside-down wine bottles is a refreshing change. Cleverly and artistically involving recycled materials... A Washington State couple called on BC&J Architects to transform their 400-square-foot boathouse into a hub for family bea... Similar to the elevated utensil concept, hanging your pots and pans from a ceiling-mounted rack keeps them nearby and easy... Few projects are more fun than upcycling a vintage piece in a surprising way. Outfitted with a sink and a delicately tiled... The thyme growing between these stepping stones adds a heady fragrance to strolls along this lush, low-maintenance garden ... Decoupage is an easy way to add any paper design to your switch plate, whether it is wallpaper, scrapbook paper, book page... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Reluctant to throw away any of those unidentified keys in your junk drawer? Hang them from a few chains attached to a simp... A stripped-down model, sans screened porch, starts out at $79,000. Add the porch, a heated floor for the bath, and all the... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon