You have a little old portable am radio ? This is a very nice tool to find noise sources nearby.
Just tune to an empty channel and listen to the clicks and zzzzzz … walk around and pass near electric/electronic stuff like your telly, a computer screen, a transfo etc etc and yes even your light bulbs, especially low energy bulbs (most leds are ok)
You’ll be surprised by the noise all those devices make. Now if you go back like 50 cm and it is near nothing, that won’t affect the air module. But if you have some electric pump or your oil heater … each time these kick in, you often have like a nice ‘spark’ … those kind of ‘sparks’ can trigger false positives.
A continuous ‘noise’ is mostly filtered out but those occasional random sparks are really hard to filter (no way to predict)
Have fun discovering your noisy surroundings (and walk to your neighbours … yep they might have stuff ‘sparking’ around