![]() ![]() The same happens when I push the non-working button - which isn't strange as it's completing the circuit. If I push the working button and hold the button in, the transformer audibly works (faint buzzing). If I turn off the fuse, the working button no longer does anything, and the previously mentioned voltage drops to 0. I tried connecting a new button and the light in it turned on, but pushing the button still does nothing.īoth buttons are connected to the same electrical circuit and transformer. I have checked the voltage between the two wires for the button that doesn't work - 14.5V. ![]() it's not connected as the "front" doorbell, which as I understand should ring the doorbell repeatedly thanks to the mercury switch). The doorbell that works only rings the chime once (i.e. Purpose of mercury switch in old doorbellīut the wiring in this chime is completely different to that post and everything else I've found online. The doorbell is the same as mentioned in this old question, including the mercury switch: I'm not so sure the broken one ever worked. According to my wife, both doorbells worked when we moved in but one stopped working within days. I recently bought a house that has an existing Friedland No. ![]()
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