DIY Doctor

Main navigation

How to test an AC/AC doorbell transformer?

Postby brian_mk » Sat Aug 21, 2021 11:18 am

You have two choices: Either open up the cases and try to diagnose and fix the problem yourself or return both supplies for a refund or replacement.

It could be something simple like a connector or soldered joint.
Opening up the cases may be difficult or impossible if they are glued.
It would also probably invalidate any guarantee.

I think I would return both supplies. Both Amazon and CPC are pretty good when it comes to returning items.
Rank: Apprentice
Progress to next rank:
Posts: 5
Joined: Fri Aug 13, 2021 7:57 am


Simply Build It

Postby Mr White » Sat Aug 21, 2021 3:38 pm

itm60 wrote: I have always been extremely careful about selecting the correct function on the multimeter

itm60 wrote: I'm connecting the output cables of the transformers directly to a multimeter, and setting the multimeter to AC/15V

But it is a 24v transformer?

itm60 wrote: In the past if I have set my multimeter to a lower range than the transformer is delivering the reading simply goes off the scale in the multimeter - it hasn't done any damage to the transformer. I have done this many times

Just because you always do something (wrong) does not mean it is correct.

There is nothing you can do other than replace them.
Mr White
Rank: Project Manager
Posts: 1004
Joined: Tue Jun 20, 2017 9:54 pm

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics