Heat Exchanger Baxi 256350820301

Bithermic (coaxial) heat exchanger that combines the functions of two circuits: heating and domestic hot water (DHW). This solution is typical for compact combi boilers where a separate plate heat exchanger is not required. Technical characteristics: For this product, compatibility and technical type are most important. General characteristics are as follows: Part numbers: 256350820301, JJJ000616170, 944.781.001, 616170. Manufacturer: Baxi S.p.A. (Italy). Heat exchanger type: Bithermic (coaxial): it is a "pipe in pipe" for simultaneous heating of heating and water. Compatibility: Baxi Main, MainFour, Main Digit boilers (also suitable for Westen Quasar). Material: Tubes are usually copper, coated to prevent corrosion. Application: Combi gas boilers with 24 kW power. Compatibility check and signs of malfunction: Since this is a complex and expensive part, be sure to verify correct selection. Key compatibility: Part number 616170 is strictly tied to the Baxi Main boiler line (24 kW). Make sure your boiler belongs to this series (MainFour, Main Digit), as other parts are used for EcoFour or Luna lines. Signs of wear: Incorrect DHW operation: water takes a long time to heat up or temperature "jumps" (hot-cold). Pressure drop: pressure in the heating system drops even without visible leaks. Reduced efficiency: boiler operates at maximum but radiators remain barely warm, and gas bills increase. Visual leaks: traces of water on the boiler casing or on the heat exchanger itself. ⚠️ Replacement recommendations: Importance of original parts: installing a non-original cheap analogue often leads to rapid failure due to corrosion or geometry mismatch. Kit: