Combi Boiler Heat Exchanger Replacement Cost in Vancouver
Published: July 22, 2026 — BC Wide Home Services Ltd, doing business as BC Wide Heating & Air Conditioning — Greater Vancouver, BC
Signs of Heat Exchanger Failure
The boiler is losing pressure frequently (internal leak), the boiler is producing insufficient heat, the burner cycles on and off rapidly, water is leaking from the boiler cabinet, or the boiler display shows a heat exchanger-related error code. A failed heat exchanger may also cause kettling noise.
Replace Heat Exchanger or New Boiler?
Heat exchanger replacement costs $1,500-3,000 (part $800-1,500 plus labour $600-1,500). A new boiler costs $4,500-8,000. If the boiler is under 8 years old, replace the heat exchanger (often under parts warranty). If over 10 years old, replace the entire boiler.
Warranty Coverage
Most boiler heat exchangers have 5-15 year warranties depending on the brand. Navien: 5 year parts, Viessmann: 5-10 years, Baxi: 5 years. If under warranty, you pay labour only. Keep annual service records — warranty claims require proof of maintenance.