Hydronic heat is common in older Ohio housing, particularly pre-war homes across the northern cities. Radiators that stay cold at the top usually need bleeding; radiators cold throughout often mean a circulator pump or zone valve has failed. A boiler that keeps losing pressure has a leak somewhere in the loop or a failing expansion tank, and one that short cycles is frequently oversized for a house that has since been insulated.
Low water pressure, a pilot or ignition lockout, banging pipes, or a relief valve discharging are each worth attention before the coldest weeks arrive. Cast-iron systems can run for decades but their controls and pumps do not. Pro HVAC connects homeowners in Bethesda, OH with HVAC professionals who work on boilers and hydronic systems. Call (321) 463-9811.
