15/20 breaker issue

[gridiron]

Breakers.....I have one 15/20 breaker that the 20 AMP side will not engage. My bedroom AC is not working and I think this goes to that. I have a 2012
RW am wondering what kind of breaker I need. Any suggestions?

[XCMARK]

if you got to HD , you most likely will find they have Murry brand mini breakers in stock that fit.

[gridiron]

Siemens Q1520 One 15-Amp and One 20-Amp Single Pole 120V Non-Current Limiting Circuit Breaker

This is on AMAZON, would this work?

[gridiron]

https://www.amazon.com/Siemens-Non-C...%2C521&sr=8-16