Vaillant Main Heat Exchanger – Refurbished | Part No. 065179

The main heat exchanger in a Vaillant boiler is the critical assembly where the heat generated by combustion is transferred efficiently into the primary water circuit. Part No. 065179 is the main heat exchanger used across a range of older Vaillant Turbomax and ecoMax combi and system boilers — a copper tube-and-fin assembly that over time is susceptible to pinhole corrosion, limescale-induced hotspots, and gasket degradation at the flow and return connections. When this exchanger begins to fail, the boiler typically experiences increasing high-limit thermostat trips, reduced heating output, and in advanced cases, trace water contamination in the flue gas. The Vaillant Main Heat Exchanger (Part No. 065179) is the correct OEM replacement for restoring full thermal output and safe, efficient operation.

This is a professionally refurbished genuine Vaillant main heat exchanger. Each unit is fully inspected — the exchanger body, tube stack, flow and return manifolds, and all gaskets and seals are assessed and replaced as required. Following refurbishment, the assembly is pressure-tested at working pressure across all ports and connections to confirm complete leak-free integrity before dispatch. You receive the same primary thermal performance as a new exchanger at a significantly lower cost.

Compatible Boiler Models

OEM Quality. Proven Performance. Backed by Warranty.

Every refurbished Vaillant main heat exchanger in our range is pressure-tested and performance-verified before dispatch. This 065179 unit restores full primary heat transfer efficiency on the Turbomax Plus and ecoMax ranges, resolves high-limit lockout faults associated with a degraded or corroded exchanger, and ensures complete gas-to-water isolation integrity is maintained. Supplied with a full 12-month warranty.

Delivery & Returns

Orders placed before 1:00 PM (Mon–Fri) are dispatched the same working day, with standard (2–3 working days), next-day, and Saturday delivery options available at checkout. Returns are accepted within 30 days, provided the item is unused and in its original packaging.

Note: Please confirm that part number 065179 matches your existing heat exchanger before ordering. Main heat exchanger replacement must be carried out by a Gas Safe registered engineer to ensure safety compliance and warranty validity.