Baxi 5122147 4 Element Primary Heat Exchanger – Refurbished | Duo Tec / Platinum / System ErP

Reduced heating efficiency, insufficient hot water, overheating lockouts, or visible signs of corrosion or scale build-up in Baxi Duo Tec, Platinum Combi, System ErP, Megaflo, or compatible Potterton Gold boilers often trace back to a primary heat exchanger that's no longer transferring heat efficiently from the burner to the heating system. The Baxi 5122147 4 Element Primary Heat Exchanger is the genuine refurbished replacement that restores that transfer across this wide compatibility range.

Every unit is professionally rebuilt, cleaned, inspected, and pressure tested before dispatch — a cost-effective repair that restores boiler efficiency without the cost of a full replacement.

Compatible Boiler Models

Also fits selected Main boilers using part number 5122147.

Rebuilt. Pressure Tested. Backed by Warranty.

This refurbished 5122147 primary heat exchanger restores efficient heat transfer from the burner to the central heating system, resolving heating failures, inefficiency, and overheating lockouts. Supplied with a full 12-month warranty.

Delivery & Returns

Orders placed before 1:00 PM (Mon–Fri) are dispatched the same working day. Standard, next-day, and Saturday delivery options available. Returns accepted within 30 days in original condition.

Note: Please confirm that part number 5122147 and your boiler's serial number prefix match before ordering. Installation must be carried out by a Gas Safe registered engineer.