Timeline for Car in driveway is source of garage door opener interference
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Jan 28, 2020 at 15:58 | comment | added | dwizum | Many TPMS will (ironically in this case) wake up and send a message any time they pick something up on their intended frequency even if the triggering signal isn't meant for them. I can see those in all three of my cars do this when sending unrelated 315 Mhz signals. I've never checked a garage door opener though and mine isn't 315 Mhz. | |
| Jan 28, 2020 at 11:22 | comment | added | Mast | @JPhi1618 If they'd transmit continuously, that would be some wasteful sensors. | |
| Jan 27, 2020 at 17:58 | comment | added | dwizum | @fred_dot_u I'm not sure wrapping foil around the tire would make a difference. The sensor is already inside a cage that's likely more substantial than thin foil (the conductive wheel plus the wire radial belts in the tire). The problem with an ad-hoc test like this is that you don't know if a certain result is true, or if you're only getting that result because you've poorly designed your test. | |
| Jan 27, 2020 at 17:02 | comment | added | JPhi1618 | Most TPMS sensors also have motion sensors and they only transmit when the car is in motion to save battery power. Furthermore, they only transmit information once a minute or if they sense a pressure change. This is a neat idea, and somewhat plausible, but I don't really think it would be enough to disable a garage door for as long as the car is parked there. | |
| Jan 27, 2020 at 16:55 | comment | added | Fattie | Amazing knowledge, Goose ! | |
| Jan 27, 2020 at 14:03 | comment | added | jwh20 | In the US at least, the 315 MHz band can be used UNLICENSED for short-range communications such as TPMS modules. There are strict power output limits on these devices that prevent the signal from propagating more than a few feet from the source. I find the idea that these very low power TPMS devices, which also will "sleep" after a few minutes of sitting still, can interfere with garage door openers which are going to be well out of range to be pretty farfetched. The door openers, however, could be defective, which would not surprise me. | |
| Jan 26, 2020 at 17:58 | comment | added | Pete Becker | If you're in the US, you can find out what frequency the garage door opener uses by finding the FCC ID on the remote, and looking it up in the FCC database. | |
| Jan 26, 2020 at 17:00 | comment | added | fred_dot_u | That's a good point. One way to troubleshoot around the TMPS is a little strange, but valid. Surround the tire with aluminum foil or a wire mesh screen, to block the signals. If my answer, including the battery disconnect, does not focus the source, yours is likely the correct answer. | |
| Jan 26, 2020 at 13:30 | history | answered | Platinum Goose | CC BY-SA 4.0 |