The transformer for my wired doorbell is connected to a light junction box. The doorbell works just fine if the light (which the transformer is connected to) is turned on using the wall switch. If the light is off, the doorbell doesn’t work at all. How do I fix this problem so the doorbell works even when the light is off?

  • Can you post photos of the insides of the boxes involved please? – ThreePhaseEel Mar 12 '20 at 1:24
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    the transformer is connected to the wrong side of the switch – jsotola Mar 12 '20 at 3:01
  • try using the other black wire to power the transformer. – Jasen Mar 12 '20 at 10:13
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    Let's be careful with advice here. The OP said the transformer was connected to "a light junction box" that could mean the fixture box. If so and the power goes first to the switch then to the fixture, there isn't any way at it's present location to correct this. If the power goes first to the jbox and a switch leg to the switch, then wiring the transformer to the blacks before going the switch leg would help. But let's get some more info first as 3PH asked. – George Anderson Mar 12 '20 at 14:57
  • Do you know where the door bell gets it’s power from , it may have been wired from the light fixture, if this is the case the wiring may be need to be changed, but more information is needed. Just to clarify; You need to identify a live circuit to draw the power from, the power to the light could be in the light fixture with a switch leg run down to the switch or the power at the switch with the door bell tapped at the light. Right now you know the doorbell is switched but it may be a case of the wrong wire used if the transformer power and the switch feed from the same box. – Ed Beal Mar 12 '20 at 14:59

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