Arrived onsite to investigate no heat in the basement and master bedroom. The home has an oil boiler with an indirect water heater, and the heating zones are controlled by zone valves. Upon arrival, the zone valves for the affected areas were found to be closed. I quickly diagnosed that the zone valves had power but were not opening. With the customer’s approval, I replaced both zone valves and verified proper operation. The system is now working properly at this time.
