Upon arrival found system working. Checked thermostat alert history and found two error codes. One for a high pressure switch and lost of communication. Turned system on a/c and checked pressures. Pressures were good. Coil was clean. Fan motor was working properly. Switched system to heat pump mode and pressures were good. Let system run for 15min in heat mode to see if pressures would rise and they stayed steady. No faults found for high pressure. On communication error found where the wire had been spliced and found water damage around wire nuts. Recommended repairing wire. Homeowner approved repair and repair wire. Turned system back on and system is now working properly.