Responded to a service call for an in-floor heating system powered by a 19-year-old boiler with diminished heating performance. Diagnosed low water pressure causing system shutdown, restored pressure, and performed comprehensive system check of zone valves, manifolds, pumps, and controls. Identified damaged control board on radiant heat mixing block and noisy air handler relay pump; flushed discolored water from loops and temporarily restored boiler operation while preparing estimate for necessary component replacements including sensors.
