Instruct: Classify Amazon reviews into positive or negative sentiment
Query: blew up

I bought this timer/switch because I have one in my garage and it works great. I bought it on-line because I can't remember where I got the first one.I wired up with the help of my father who is an electrician, Right when I turned it on I heard a big pop sound then a little brunt smell, and a tripped breaker.I ask my father about it, he said sometimes you get a "bad" switch. Told me to bring it back, but when you do things on-line, it's diificult to return items like this one.Next time I'll think before spending over $20 for electrical parts on-line