My door bell receiver works fine but my outside button does not work?

Try this:

Reset the Unit

- remove all the batteries from the bell
- ensure the battery in the doorbell unit is working and remove the back cover
- replace the batteries in the bell unit
- within 30 seconds of the bell unit sounding the bell, press the melody changer button on the back of the door bell unit once
- remove all the batteries from the bell

Pair the Unit

- wait at least a minute after reset
- remove all the batteries from the bell
- replace the batteries in the bell unit
- within 30 seconds of the bell unit sounding the bell, press the door bell button

Try replacing battery Ensure it installed correctly and not backwards.

Door ringer is defective or the doorbell transmitter is not sending a signal or the bell is not receiving the signal due to a part failure.

WHAT IS THE BRAND NAME OF DOOR BELL

Yes, there is a small battery in the door bell button, use a small screwdriver to carefully pry it apart, make sure the transmitter and receiver are on the same frequency and within range of each other.... really hope this helps?

Your receiver has failed. The hardwired wall control doesn't use the receiver but the remote and the keypad do.

Check your door sensors to make sure they are properly pointed at one another and that the small light on each one is lit and not flickering. Tweak them a bit. If you can't get both lights to come on you have bad sensors.

replace the button switch

The electromagnet that causes the bell clapper to move when the circuit is closed by pushing the button is failing. Replace the bell unit.

This means that the read is over the HIGH limit of the sensor, perhaps is too hot there. Change it to another location. josemaX