Came out for an evaluation possible recall found the system locked out for retries reset the board got the system running turned it on and turned it back off several times with no issue finally tripped the high limit switch at this time I removed a screw and inserted a probe to monitor the temperature to verify the high limit this never breached the manufacturer's specifications therefore I am deeming the high limit switch faulty and we will be replacing it under warranty at no charge to the customer this is a part that is not in local stock and we will be ordering it and the parts manager will be reaching out to the homeowner as soon as possible with a lead time currently the system is running and heating the home during my diagnostic I discovered the filter we sold the homeowner a few days ago is improperly sized we need to replace this at no cost to the customer the proper filter that we need to acquire is a 410 April air filter the one that we installed previously is a 210 April ai