hey guys. anyone ever have troulbles with a trane ptac not bringing on supply fan during defrost? i have lost 4 electric heaters and today found a board that did not bring on fan while unit was in defrost. they are model-PTHE1201UABA with an inncom t-stat. wondering if compatability issues with t-stat and unit.The t-stat was calling for fan to be on.24v at gh. Trane hints at it but wont say yes or no. we have installed 250-300 of these in 3 hotels and wondering if this is gonna snowball. thanks for any help!