E5 code on furnace upon arrival. Fuse was blown. Replaced it and same thing happened again. Looked at low voltage circuit, didn’t find any damaged wires. When I removed wires from both side of motor starter, fuse did not blow. When reattaching wires to motor starter, fuse would blow. Motor starter had failed. Installed new starter and fuse. Unit now mechanically runs. However, unit would need to a tune up to accurately check the rest of operation. Customer said it was recharged with refrigerant last year. Customer said they will leave system off for now until it is replaced. Did provide replacement options for customer. Will follow up next week. Repairs made today covered by WHE.