Pit boss told me it probably just needs a good cleaning?You need a new internal temp probe. Easy fix. Call Pit Boss and they will send a new one. It's very easy I had to replace one on mine but I got tired of waiting on them to ship so I ordered one from Amazon with 1 day shipping. The one from PB eventually showed up and I saved in case I need it. If you order from Amazon just make sure you get the correct one they usually have models listed.