I'm looking for push button for a trine/desa model #SL-6166-RX

https://www.homedepot.com/p/questions/Heath-Zenith-Wireless-Battery-Operated-Doorbell-Push-Button-Black-and-Satin-Nickel-SL-7303-02/100626792/2

I found this in the Questions

Q:Hello, I need a wireless doorbell button replacement for the Doorbell model: "desa sl-6180-rx-a". Please, help. Thanks byTim'May 31, 2020

1 Answer A: Hi Tim, Any of our Heath Zenith or Hampton Bay branded buttons will work with that model. You will need to put it in backwards compatible mode. Please contact our technical service team and we'd be happy to help.
byHeathCo'Jun 2, 2020

Also sold by Heath Zenith and where there Product Support is.

https://heath-zenith.com/products/wireless-push-button-sl-7797

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You could use rf signal meter to check transmitter signal. I just use a unit that flashes led s when it gets a signal. Otherwise you are better off to replace it.

Heath/Zenith SL-6166-C Wireless Plug-In Door Chime Kit ...

www.amazon.com > ... > Door Chimes & Bells > Kits
Amazon.com, Inc.Heath Zenith SL-6198-B Wireless Doorbell Replacement Battery. Total price: ... Plug-in doorbell chime, doorbell button/transmitter with battery, hardware pack ...

It seems your doorbell transmitter got wet and corroded the contacts.
These push buttons are not sealed at all and thus will let rain, snow etc. eventually corrode the electronics.
Solution: Find a new push button on eBay.


Cheers

Heath-Zenith (I beleive they bought DESA) makes a battery remote push button bell that says its compatible with all Heath Zenith chimes. I bought one at Home Depot and it worked for my SL-6195-RX. (an on line doorbell seller and the Home Depot assoc all said it wouldn't work.)
UPC is 16963961975.
Item also shows a code "11G43" on a sticker on the back of the package.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/steven_7f54ab9063554f66

ok.the bell have number or setting put the number in the right order.one at a time.good l

Clean contacts to the battery, try again?

You can buy a new wireless doorbell intercom camera units.

http://heath-zenith.hcents.com/data/manuals/598-1034-02.pdf

Batteries are located in the doorbell push button case in the back. Slide open a compartment to reveal the batteries.