Furnace Vent Pipe Ice Damage — Repair and Prevention
Published: July 23, 2026 — BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning — Greater Vancouver, BC
Types of Ice Damage
Ice can: crack PVC pipes from expansion inside (freeze-thaw cycles), separate pipe joints (ice in joints pushing them apart), block the termination causing furnace shutdown, and sag the pipe from weight (improper support allows ice accumulation). Any of these require repair before safe furnace operation.
Repair Options
Cracked section: cut out and replace with new PVC pipe and couplings ($50-150 materials). Separated joint: clean, prime, and glue using PVC cement ($5-10). Blocked termination: clear ice and install a termination cap with larger openings ($20-40). Sagging pipe: add additional pipe supports every 3 feet.
Professional Repair Cost
Professional vent pipe repair costs $200-600 depending on the extent of damage. Simple joint repair: $150-300. Section replacement: $200-400. Full vent system replacement (if severely damaged): $500-1,500. Have repairs done promptly — a damaged vent can leak carbon monoxide.