Instruct: Classify the given Amazon review as either positive or negative.
Query: Sensor did not work

Have used these before and bought this replacement package. The sensor will not work. Nothing happens at all. It is nearly impossible to find a way to get the company to honor its warranty. After 2 attempts and nearly an hour I realized I was spending more of my time than the unit was worth. Also the unit has more printed info on it than the picture and there is no model number on it. Odd. The receiver does work with the spare sensor that I bought.