Heise's Plumbing recently completed a professional tankless water heater repair for a residential home in the Diamond Heights neighborhood of San Francisco, California. The homeowner reported a complete loss of hot water and an error code on their wall-mounted tankless unit. Our technician arrived promptly, inspected the system, and determined that the flow sensor and gas valve required servicing. We completed the necessary repairs to restore continuous hot water flow and thoroughly flushed the system to clear mineral scale deposits from the heat exchanger. After completing the repair, the tankless water heater was fully tested to verify all safety controls and temperature sensors were operating at peak efficiency for safe, reliable operation.


