by Burgerman » 09 Oct 2020, 07:58
The RF device inside the van doesent use BT it uses 460/480 or 900mhz ISM band as far as I know. All the ones I saw use this. And they are powered directly from the vans electrical system. Trust me if it can start the van it wont have any trouble with the RF device! Even if it used BT the same applies. Its even more effected by millions of phones, wifi, etc.
Maybe someone fitted an alarm system, on a nearby building, or any one of many systems like a baby alarm audio system, cameras, door openers, customer counters, work forklift or employee tracking systems or whatever nearby where you work. Many many devices now use those same unregulated frequencies. 400 and 900mhz frequencies. Even phone towers. Esp 4G and the new 5G being installed. Even taxi or truck radio systems do.
If you hold the key fob higher up against a window, the RF signal doesent need to go through the van steel bodywork. So might still operate the van against the RF interference. Mine does!