believe me i am the most inept f'er when it comes to this stuff...and i was scared shitless doing it...the only thing you have to do is shut down the main power...where all power to house is off..take a screwdriver take out old breaker,hook new one up and screw back in..takes about 5 minutes...make sure you replace right one..
the guy wanted 125 bucks to replace mine,when dryer went out...i went to lowes (took old breaker with me) they showed me what i needed came back home and installed,saved over 100 bucks and time waiting for the repairman