Thermostat blank upon arrival. Had error code on furnace, E5. In-line fuse was blown. Replaced it with a new one. Didn’t find anything burnt or damaged wires. Looked over furnace, didn’t find anything wrong with it. Furnace is back up and heating. Pressure drop across filter is higher than what is allowed, we will send a new media filter to home. Also signed customer back up on sunshine club.