Troubleshooting Wired Doorbell (continued) Probity The doorbell sounds bul does not play the entire {une or the "TUNE" bunion does not work, Possible Cause 0 al The push button diode is not installed cor erectly or is not working papery. The transformer may not be working properly. Solution uo Verity the diode Js attached securely to the mal push button; see step 5 under Installation Wired Doorbell The doorbell may not function properly ia diode is installed on more than one push button.