I am having a problem with my doorbell and am totally stumped. The
problem is that it sometimes works and sometimes doesn't work. It is an
electronic bell from Home Depot with 65 melodies. It has a lighted
button. The light goes out every time the button is pushed but the bell
only rings some of the times. When it doesn't work, it just doesn't
work no matter how many times the button is pressed. The light goes out
every time but the bell doesn't ring.
After several hours, it can start working again by itself.
I tried replacing the button with a non-lighted version. Now the bell
only rings while the button is pressed and if it is released, the ring
stops in the middle (without finising the whole melody).
Anyone has any idea?
actually the other way round..i think the bulb is passing too much
current so the door bell thinks the button is continuously pressed.
When the bell stops working, try removing power or disconnnecting the
button for a few seconds, then see if it works again.
if htis is the problem, you need a button with a SMALLER bulb that
passes less current so that the bell can recognize when the button is
Thanks for the response.
The lighted button came with the bell. It has two terminals. The
circuit is like a conventional ding-dong bell with one leg of
transformer going to the bell and the other going to the button and
button returning to the front screw on the bell.
It also came with a diode but the label on the button said that diode
is pre-installed so I didn't do anything with the diode.
The Transformer I am using is 16V and it is the one recommended on the
packaging of the bell.
Not quite enough info to give a good diagnosis.
Did the lighted button have only 2 terminals (2 wires). If so the light was
surely wired in parallel with the button. When pressed, the voltage across
the bulb is shorted out and the lamp goes out momentarily. When not pushed,
some current would go through the bulb which could be used to sense or power
a circuit but that just dosen't seem like the case for a doorbell. (it is
the case for some light timers and dimmer switches which work only with
incandescent bulbs). Did the button come with the bell or should it work
with any button?
In a normal doorbell, power is supplied to the bell only when the button is
pushed. What I don't know is if your fancy electronic doorbel is wired like
a normal passive bell or if it is powered directly then powers the button
seperately. Wiring the two types would be different and is likly where your
problem lies. Read the instruction/installation manual again and call the
company hotline for questions. You may simply have a defective doorbell.
If the bulb is required, then you should be able to simulate one by placing
a resistor across the button terminals of the unlighted button. for a 4W
light and 12V supply, the equivelent resistor would be 36ohms in a 5W
Try wiring the original lighted button in reverse.
A diode Huh? Probably does need to go somewhere. Since the power is on the
other side of the button, the bulb does indeed keep the bell alive by
allowing current to pass through it. Since it came with the bell, it's a
safe bet it is the right size bulb.
If the lamp inside the button is really an LED (brighter and usually a
distinct color as opposed to an incandescent bulb) than that itself is a
diode and if installed backward may still light since the power is AC but it
may fail to rectify the voltage for the bell to work correctly (unlikly
cause it works with a regular button). Find out where the diode goes and
try it, it shouldn't cause any more problems. Make sure it goes in the
right direction, diodes only work one-way. The diode is probably needed
when you don't use their button.
Its difficult to say if running without proper diode rectification would
cause any damage. Would be a lousy design if it did.
The light is a bonus and has nothing to do with the bell. If you press the
switch and the bell responds even a little, then the electronics in the bell
module are to blame. Take it back for replacement or refund. If sometimes
you press the switch and nothing happens ,then it's a possibility your
switch is defective. Check it with a meter. Ignore the light.
on giving it more thought, the direction of the diode in the button
shouldn't matter since the input voltage is AC the direction of the diode
only determines the phase of the half wave signal at the output not its
shape or magnitude (as opposed to the same diode in reverse)
You probably just have a defective unit. it shouldn't be intermittant if it
were hooked up wrong.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.