De Dietrich 89628514 side cover assembly

This side cover assembly, catalogue article 336.451.002 and manufacturer code 89628514, is a De Dietrich boiler housing part. Parts of this type enclose the boiler casing, provide access to internal components, and may incorporate insulation that helps retain heat within the combustion chamber. They are designed for a specific appliance, and selection is determined by the boiler model and the exact position in the assembly rather than by a technical rating. When replacing such a cover assembly, the fit and geometry must match the original to maintain the seal and prevent heat loss. Any insulation included in the assembly degrades over time with repeated heating and cooling cycles. If the old insulation is compressed, cracked, or missing, the new assembly supplies fresh material that matches the required thickness and shape, avoiding hot spots that could damage the casing or adjacent parts. Always confirm the boiler model and the side (left or right, if applicable) before ordering, as the mounting points and insulation pattern are model-specific.