I have two doorbell chimes with a front and rear button. The existing transformer has been replaced but now I can't get a two chime audible noise when the rear button is depressed. The chimes should have one tone for the front door and two tones for the rear door. Any ideas on what the problem may be?
Does the plunger for the rear door chime move at all when you press the button?
It is possible that the voltage of the new transformer is too low to activate the chimes. There may be an adjustment (connecting to a different tab) for the transformer
Be careful when using illuminated pushbuttons. Too high a voltage will burn them out. If the voltage needed to operate the chime is more than the lights use, you may be able to use a lower voltage setting by stringing thicker wires over part or all of the doorbell circuits.
Note: If you calculate voltage drop for the chime and jack up the voltage to compensate, illuminated pushbuttons will still burn out. This is because fewer volts are dropped within the wires when only the lights are on.
The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.