▲ 3 r/hvacadvice
No one knows what this is
What is this noise in my wall every time the central A/C comes on? it’s always random sometimes it’s louder or quieter. sometimes more frequent. there’s not a vent nearby it but it only occurs when the A/C is on. A/C technician couldn’t replicate the noise or find anything causing it in the attic.
u/Aware_Ad7048 — 5 days ago