I bought a copperhead vertical smoker couple months ago. Third time using it temp went to 500 degrees when set at 225 Luckily I was watching the pork shoulder pretty closely , since this was new. It then went to error mode now It won't maintain the temp. I sent an e-mail to pitt boss support and got a case number but haven't gotten any reply except for Their Corona virus message. It has been over three weeks with no reply from them. Any ideas on what would be the problem.