Alpha CD35C Primary Heat Exchanger (21CM) – Refurbished | Part No. 1.023674

When an Alpha CD35C boiler suffers a drop in heating performance, unusual noises, or combustion inefficiency, the primary heat exchanger is a common cause. The Alpha CD35C Primary Heat Exchanger (Part No. 1.023674) is a fully refurbished genuine Alpha replacement that restores efficient heat transfer from the burner to the heating circuit, keeping your boiler performing at its best.

This is a fully refurbished original Alpha part, carefully quality-checked by experienced engineers before dispatch. The unit measures 21CM in depth — it is critical to confirm this dimension matches your existing exchanger before ordering, as a different-depth unit will not fit correctly.

Compatible Boiler

Key Features

• Alpha part number 1.023674 — direct OEM replacement for Alpha CD35C primary heat exchanger
• Fully refurbished: quality-tested by experienced engineers before dispatch
• Important: Depth is 21CM — confirm this matches your existing unit before ordering
• Restores efficient burner-to-water heat transfer and resolves heating output loss
• Only 1 left in stock
• 12-month warranty included

Note: Please confirm part number 1.023674 and depth 21CM match your existing heat exchanger before ordering.

Delivery & Returns

Orders placed before 1:00 PM (Monday–Friday) are dispatched the same working day. Standard and next-day delivery options available at checkout. Next-day orders placed on Fridays arrive Monday — select Saturday delivery at checkout for weekend delivery. Returns accepted within 30 days if unused and in original packaging.

Note: Installation must be carried out by a Gas Safe registered engineer.