Instruct: Classify Amazon reviews into positive or negative sentiment
Query: poor quality- themostat controller

The first char-broil patio grill I purchased worked quite well and lasted for several years. The replacement I purchased was very disappointing. In general, the quality of the second grill was not as good. But the bigger problem has been the thermostat. The first one burned out after less than 4 months and the replacement thermostate I purchased for $50 lasted less than 2 months. I am not investing any more money in this grill. I contacted customer service and they sent me another themostat and then it burned out too. They really need to fix this problem. They are lossing alot of business.