To fix a leaking heating vent valve, first turn off the heat source and allow the vent to cool. Inspect the valve for debris or damage. Clean or replace the valve seat if worn. Tighten loose connections and seal gaps with caulk. If the issue persists, consult a professional.

Leakage occurs when the valve seat is misaligned, damaged, or blocked by debris, preventing proper sealing. Thermal expansion and contraction over time can loosen connections, exacerbating leaks. According to the U.S. Environmental Protection Agency (EPA), 20-30% of residential heating inefficiency stems from leaks, costing homeowners an average of $200 annually in energy waste. A 2020 National Association of Home Inspectors (NAHI) study found that 15% of HVAC system failures involve faulty valve components, with improper maintenance being the primary cause. Replacing a damaged valve seat or tightening loose bolts addresses mechanical failures, while caulk seals minor gaps. Regular inspections reduce long-term costs and energy loss, aligning with the EPA’s recommendation for annual HVAC maintenance to optimize efficiency.