Supply temp is 49 degrees with a return of 70 degrees. Delta T is 21 degrees. Air filter is clean. Air circulation system is clean. Tightened electrical connections on T-Stat port on the electronic control system. Air circulation voltage enhancement system has a factory spec of 10uf and reads 9.5uf and is within the allowable fault. Leak searched indoor heat transfer system and found no leaks. Water removal system is clean. Inspected combustion chamber with camera and found no areas of concern. Air circulation system is reading 7.45 amps. Wd40 wipedown on the indoor system. Outdoor heat transfer system is clean. RLA and FLA are within factory spec. Outdoor voltage enhancement system has a factory spec of 45/7.5 uf and reads 42.3/4.5 and is out of factory spec. Voltage enhancement system should be replaced.