System is working.
Pump piping run was loose. From bottom feed. Pump stuck out and was accessible to people passing. Pump body was very hot.
A/S valve stuck.
Sensor wiring not secured.
Exterior insulation degrading.
Sensor wiring exposed and cracking.
Screws attaching struts to collector are rusted.
Air vent port is locked - calcified.
Body of freeze valve appears to be deteriorating - metal parts.