UK Doorbell chime wiring

[Richard Cook]

Thanks again so much for the help.

Attached is a photo of my multimeter. I’ve set it to AC volts and probed T1 with T3 and got 16v and then did the same with T1 and T0 and got 16.80v.

I went to the transformer and did the same and got around 16.78v.

 

[Avo Mk8]

That's great that you have volts at the chime.

It's possible that the wires to 0 and T3 are the wrong way round,
if you get a short piece of wire and quickly dab terminals 0 and 1 together, does it chime?
if you get a spark instead, the 0 and T3 wires are almost certainly the wrong way round.

16 volts is a bit higher than I expected, though the transformer is off load. Vaguely possible there's something odd going on. Let us know how you get on!

 

[Avo Mk8]

Another couple of tests if things are still not working. Preferably turn the mains to the transformer off for this.
Set the multimeter to the ohms range, and measure the resistance between terminals 0 and T3. This should be the chime solenoid resistance.
Also, as per post 4, and if there's someone there to help, on ohms range, measure between 0 and 1 while somebody holds the bell push down. Should be a low resistance that goes away when you release the bell push (unless there's a light bulb in the bell push in which case you get a higher resistance)!

 

[Richard Cook]

It's possible that the wires to 0 and T3 are the wrong way round,
if you get a short piece of wire and quickly dab terminals 0 and 1 together, does it chime?
if you get a spark instead, the 0 and T3 wires are almost certainly the wrong way round.

Okay! So! I think we're getting somewhere.

I quickly dabbed terminals 0 and 1 together and it did chime (!!!) but also got a wee spark.

Should I try and swap 0 and T3 around and see if it chimes with no spark?

 

[Richard Cook]

I went out and looked at the bell push. Think it's knackered. I removed from the wall and used a length of wire to touch the two wires and it rang the bell! I think the terminals on the bell push are corroded so have ordered a new bell push and, fingers crossed, that should be that.

I really appreciate all the help you've given.

 

[Avo Mk8]

I went out and looked at the bell push. Think it's knackered. I removed from the wall and used a length of wire to touch the two wires and it rang the bell! I think the terminals on the bell push are corroded so have ordered a new bell push and, fingers crossed, that should be that.

I really appreciate all the help you've given.

Glad you've got to the bottom of it!
It's obviously all wired correctly, so no, don't swap any wires round now.

Bell pushes do tend to die, especially if they are exposed to the elements!

Pleased to have helped ?
Now back to painting the ceiling.