Ideal Esprit Main Heat Exchanger – Refurbished | Part No. 177566

The main heat exchanger in an Ideal Esprit boiler is the core thermal component — the stainless steel or copper assembly through which combustion gases transfer their heat energy into the primary water circuit. When this component deteriorates through corrosion, scaling, or thermal fatigue cracking, the boiler's efficiency falls progressively, flue temperatures rise above normal parameters, and the boiler may begin generating fault codes relating to high limit thermostat trips or combustion analysis failures. In advanced cases, pinhole leaks in the exchanger body allow flue gases to enter the water circuit — a serious safety concern requiring immediate rectification. The Ideal Esprit Main Heat Exchanger (Part No. 177566) is the correct OEM replacement for restoring full thermal efficiency and safe operation.

This is a professionally refurbished genuine Ideal heat exchanger. Each unit undergoes a thorough inspection of the exchanger body, flow and return manifolds, flue connections, and all gaskets and seals — with worn or compromised components replaced as required. The assembly is then pressure-tested at working pressure to confirm structural integrity and complete leak-tightness across all joints before dispatch. You receive full OEM-spec thermal output and safety performance at a significant saving over a new replacement unit.

Compatible Boiler Models

OEM Quality. Proven Performance. Backed by Warranty.

Every refurbished main heat exchanger we supply is pressure-tested and performance-verified before dispatch. This 177566 unit restores full primary heat transfer efficiency on the Ideal Esprit range, resolves high-limit lockout faults associated with reduced flow through a degraded exchanger, and ensures complete isolation between the flue gas and water circuits. 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 177566 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.