Change frequency of garage door opener?

[TechBoyJK]

My step-bro's wife misplaced their garage door opener and is afraid someone took it. Assuming they can get another garage door opener, is it difficult or even possible to change the frequency? I guess it depends from model to model but is this a common ability?

 

[amdhunter]

Originally posted by: TechBoyJK
My step-bro's wife misplaced their garage door opener and is afraid someone took it. Assuming they can get another garage door opener, is it difficult or even possible to change the frequency? I guess it depends from model to model but is this a common ability?

Easier to replace the wife.

 

[69Mach1]

All of the ones I've had had a panel over a set of dip switches. Match up the dip switches on the door opener and the remote.(check the battery compartment on the remote, should have dip switches in there too) These were several years old now , so they may have a different means, but I'm sure you can still change it.

 

[Miramonti]

Unplugging it and plugging it back in changes the rolling codes so the remote won't work anymore without resyncing.

 

[Red Squirrel]

What's with woman always loosing means to access something. Keys, remotes, etc... That is totally something my mom would do. She looses her car keys like at least once a week.

 

[Sea Moose]

this sounds like a movie....

you change the frequency, and you set off americas nukes

 

[SonnyDaze]

How do you misplace a garage door remote? I can't even imagine a woman fucking this up.

Doesn't it stay in the car? On the visor? In the console?

Did she leave it at the supermarket or laundrymat?

 

[Engineer]

Originally posted by: jjsole
Unplugging it and plugging it back in changes the rolling codes so the remote won't work anymore without resyncing.

Not on any door opener that I've ever had. If that were the case, losing power over the years would have caused me to have to resync the unit about 1,000 times.

Every one that I've saw had 8 dip-switches in the remote. I think you have to set the remote and then reteach the opener to match the remote. All remotes would need to be changed, I would think.

 

[TechBoyJK]

Originally posted by: SonnyDaze
How do you misplace a garage door remote? I can't even imagine a woman fucking this up.

Doesn't it stay in the car? On the visor? In the console?

Did she leave it at the supermarket or laundrymat?

No... They live in a duplex, and I'm moving into the other side. My lease for my old apartment expired at the end of last month, but I'm just now being able to move into the duplex. So, I put alot of my stuff in their basement. When the place finally passed inspection, I wanted to move stuff in. I had a key to the duplex, but not to their basement, so she apparently set the garage door opener on my side's kitchen counter. Unfortunately, when I looked for it, it wasn't there. So I don't know where it is, and niether does she.

 

[Miramonti]

Originally posted by: Engineer

Originally posted by: jjsole
Unplugging it and plugging it back in changes the rolling codes so the remote won't work anymore without resyncing.

Not on any door opener that I've ever had. If that were the case, losing power over the years would have caused me to have to resync the unit about 1,000 times.

Every one that I've saw had 8 dip-switches in the remote. I think you have to set the remote and then reteach the opener to match the remote. All remotes would need to be changed, I would think.

That's the standard old-school approach, while the rolling code security feature is an additional level of security standard with relatively newer models. While models will still probalby have dips, unplugging will change the rolling code and desync the remotes.

wikid

The third stage of garage door opener market uses a frequency spectrum range between 300-400 MHz and most of the transmitter/receivers rely on hopping or rolling code technology. This approach prevents perpetrators from recording a code and replaying it to open a garage door. Since the signal is supposed to be significantly different from that of any other garage door remote control, manufacturers claim it is impossible for someone other than the owner of the remote to open the garage. When the transmitter sends a code, it generates a new code using an encoder. The receiver, after receiving a correct code, uses the same encoder with the same original seed to generate a new code that it will accept in the future. Because there is a high probability that someone might accidentally push the open button while not in range and desynchronize the code, the transmitter and receiver generate look-a-head codes ahead of time.

 

[nife4]

My garage door opener has a button on the back to sync the remotes & also has instructions on resetting all remotes. look on your garage door opener

 

[DayLaPaul]

Yes it is possible. Look up the make/model of the opener, then see if you can find it's manual online. The instructions will be in there.

 

[mugs]

Originally posted by: nife4
My garage door opener has a button on the back to sync the remotes & also has instructions on resetting all remotes. look on your garage door opener

This.

Assuming it's not an old garage door opener. I don't know when they stopped using the DIP switches.

 

[BoomerD]

make and model of opener would make giving accurate info much easier.

Of course, with that info...you could always just google it yourself...

 

[spidey07]

Just read the manual. There's a way to reset the codes (almost any garage door opener the last 10+ years). Then you train/learn remotes to it.

If you can't find the opener then for sure do this. A lot of times thiefs will get into cars and steal only the garage opener, then they come back when you're not there and make off with the booty.

 

[Engineer]

Originally posted by: jjsole

Originally posted by: Engineer

Originally posted by: jjsole
Unplugging it and plugging it back in changes the rolling codes so the remote won't work anymore without resyncing.

Not on any door opener that I've ever had. If that were the case, losing power over the years would have caused me to have to resync the unit about 1,000 times.

Every one that I've saw had 8 dip-switches in the remote. I think you have to set the remote and then reteach the opener to match the remote. All remotes would need to be changed, I would think.

That's the standard old-school approach, while the rolling code security feature is an additional level of security standard with relatively newer models. While models will still probalby have dips, unplugging will change the rolling code and desync the remotes.

wikid

The third stage of garage door opener market uses a frequency spectrum range between 300-400 MHz and most of the transmitter/receivers rely on hopping or rolling code technology. This approach prevents perpetrators from recording a code and replaying it to open a garage door. Since the signal is supposed to be significantly different from that of any other garage door remote control, manufacturers claim it is impossible for someone other than the owner of the remote to open the garage. When the transmitter sends a code, it generates a new code using an encoder. The receiver, after receiving a correct code, uses the same encoder with the same original seed to generate a new code that it will accept in the future. Because there is a high probability that someone might accidentally push the open button while not in range and desynchronize the code, the transmitter and receiver generate look-a-head codes ahead of time.

So if you lose power, it doesn't work unless you take it inside and resync it? That's a bunch of shit, if true.

 

[drnickriviera]

Originally posted by: Engineer

Originally posted by: jjsole

Originally posted by: Engineer

Originally posted by: jjsole
Unplugging it and plugging it back in changes the rolling codes so the remote won't work anymore without resyncing.

Not on any door opener that I've ever had. If that were the case, losing power over the years would have caused me to have to resync the unit about 1,000 times.

Every one that I've saw had 8 dip-switches in the remote. I think you have to set the remote and then reteach the opener to match the remote. All remotes would need to be changed, I would think.

That's the standard old-school approach, while the rolling code security feature is an additional level of security standard with relatively newer models. While models will still probalby have dips, unplugging will change the rolling code and desync the remotes.

wikid

The third stage of garage door opener market uses a frequency spectrum range between 300-400 MHz and most of the transmitter/receivers rely on hopping or rolling code technology. This approach prevents perpetrators from recording a code and replaying it to open a garage door. Since the signal is supposed to be significantly different from that of any other garage door remote control, manufacturers claim it is impossible for someone other than the owner of the remote to open the garage. When the transmitter sends a code, it generates a new code using an encoder. The receiver, after receiving a correct code, uses the same encoder with the same original seed to generate a new code that it will accept in the future. Because there is a high probability that someone might accidentally push the open button while not in range and desynchronize the code, the transmitter and receiver generate look-a-head codes ahead of time.

So if you lose power, it doesn't work unless you take it inside and resync it? That's a bunch of shit, if true.

It's not true. I've worked on all kinds of openers over the years, none of them do that.

 

[Miramonti]

Originally posted by: drnickriviera

Originally posted by: Engineer

Originally posted by: jjsole

Originally posted by: Engineer

Originally posted by: jjsole
Unplugging it and plugging it back in changes the rolling codes so the remote won't work anymore without resyncing.

Not on any door opener that I've ever had. If that were the case, losing power over the years would have caused me to have to resync the unit about 1,000 times.

Every one that I've saw had 8 dip-switches in the remote. I think you have to set the remote and then reteach the opener to match the remote. All remotes would need to be changed, I would think.

That's the standard old-school approach, while the rolling code security feature is an additional level of security standard with relatively newer models. While models will still probalby have dips, unplugging will change the rolling code and desync the remotes.

wikid

The third stage of garage door opener market uses a frequency spectrum range between 300-400 MHz and most of the transmitter/receivers rely on hopping or rolling code technology. This approach prevents perpetrators from recording a code and replaying it to open a garage door. Since the signal is supposed to be significantly different from that of any other garage door remote control, manufacturers claim it is impossible for someone other than the owner of the remote to open the garage. When the transmitter sends a code, it generates a new code using an encoder. The receiver, after receiving a correct code, uses the same encoder with the same original seed to generate a new code that it will accept in the future. Because there is a high probability that someone might accidentally push the open button while not in range and desynchronize the code, the transmitter and receiver generate look-a-head codes ahead of time.

So if you lose power, it doesn't work unless you take it inside and resync it? That's a bunch of shit, if true.

It's not true. I've worked on all kinds of openers over the years, none of them do that.

It's 100% true with my Craftsman.

 

[manlymatt83]

Originally posted by: Engineer

Originally posted by: jjsole
Unplugging it and plugging it back in changes the rolling codes so the remote won't work anymore without resyncing.

Not on any door opener that I've ever had. If that were the case, losing power over the years would have caused me to have to resync the unit about 1,000 times.

Every one that I've saw had 8 dip-switches in the remote. I think you have to set the remote and then reteach the opener to match the remote. All remotes would need to be changed, I would think.

so 8 dip switches means 256 possible combinations right? Which means if I get a remote, I can set it to 1 of 256 possibilities and try them all until it opens?

 

[spidey07]

Originally posted by: manlymatt83

Originally posted by: Engineer

Originally posted by: jjsole
Unplugging it and plugging it back in changes the rolling codes so the remote won't work anymore without resyncing.

Not on any door opener that I've ever had. If that were the case, losing power over the years would have caused me to have to resync the unit about 1,000 times.

Every one that I've saw had 8 dip-switches in the remote. I think you have to set the remote and then reteach the opener to match the remote. All remotes would need to be changed, I would think.

so 8 dip switches means 256 possible combinations right? Which means if I get a remote, I can set it to 1 of 256 possibilities and try them all until it opens?

yeah, if the garage door opener is 20 years old. Once thiefs learned how to build a circuit that cycled through all the combinations, game over.