Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Dosn't work for a small car.

I purchased the 1 1/2" heater for my 2001 Chevy Cavalier. I had a little difficulty installing it, because the lower hose is only straight for about 3 inches. I did get a piece cut out, and the heater installed on the hose. When I plug it in, it gets hot right away...than trips the circuit breaker. I don't know if I got a bad unit, or if it is just too much heater for a little car. Either way, buyer beware if you plan on installing in a small car.