I’ve been searching for way too long for the doorbell transformer in our house (I suspect it’s not putting quite enough juice for a Nest Hello doorbell setup as the Nest Hello works but the chime doesn’t sound because the solenoid moves but not as much as it needs to).
Anyway, I’ve been looking for this doorbell transformer in all the typical places, such as behind the chime or the button, in the circuit breaker panels, garage, closets, attic, crawl space, etc. and not finding it.
The one thing I found that looks like a transformer is on top of a galvanized metal switch in the closet with the furnace (Trane XL-80 gas furnace). I was guessing that it was a furnace transformer, but is it possible that this is the doorbell transformer?!
Update: What is this?
Best Answer
Your pic is a furnace transformer. A furnace transformer will be located close to the furnace and in most cases is mounted to the furnace itself. Doorbell transformers are a different story. I've found them in walls, behind the chime. I've also found them in the attic as well as the basement or crawlspace.