I have a 2015 Thor Challenger 37 GT. the problem is the slides will retract or extend. I've searched everywhere for a fuse or circuit breaker. It's has to be so simple, that l'm overlooking it.

SOURCE: I have a residential panel with all Challenger

You should only use breakers listed for the panel you have Look on the inside cover of the panel and see what breaker numbers are listed. Many breakers will fit, but are not listed. They are both 15A, but you didn't indicate what brand of panel they are installed in. Most likely, the GE breaker was added,

SOURCE: Will an Eaton br 120 circuit breaker properly replace a challenger c120?

Hi - I'm an electrician and can help you with this question.

It is very important to note that only those circuit breaker models listed on the electrical panel cover are permitted by electrical code to be installed in the electrical panel. Introducing any other brand or model circuit breaker voids the UL or FM listing, regardless if it fits.

This is because the manufacturer sends his product to a UL and/or FM laboratory for thorough testing and certification. The product (electrical panel in this case) is tested with all the breakers the manufacturer supplies with the panel. If the panel passes the tests, the manufacturer receives the much coveted UL and/or FM listing or mark for the panel and breakers that pass and can be marketed and sold. Only those breakers that were tested and passed in that panel and are permitted to be used in the panel and can be considered a UL and/or FM listing assembly. The code allows only those electrical products bearing this mark to be installed. So, even though each manufacturer has their individual products tested in different combinations, they can not be "mixed and matched" between different manufacturers and products not tested in that particular combination. The only the tested combinations the passed are printed on the inside of the panel cover. Mix and match results in an electrical code violation (an inspector would require the correct breaker before giving an approval) and if a fire breaks out - and it is determined that the source was this circuit breaker - most insurance companies will not pay a claim. That's a lot of risk for a $10 circuit breaker.

You should only install a circuit breaker that is listed for use in the panel you have. Check this link for a listing of C120 breakers available for purchase

Good luck!