The Glow-Worm 801635 Heat Exchanger Door Seal is a genuine replacement sealing component designed to maintain a secure, airtight fit between the heat exchanger door and the boiler casing in compatible Glow-Worm boiler models. This precision-made seal helps prevent combustion gases and heat from escaping the exchanger chamber, supporting safe operation, efficient heat transfer, and stable internal pressure. It is intended to be installed by a qualified heating engineer during servicing, maintenance, or when the original seal shows signs of wear, hardening, or damage.

Compatibility for the 801635 heat exchanger door seal includes Glow-Worm Easicom, Ultracom, CXI, and HXI boiler models that utilise this specific door seal design. Always confirm your boiler’s exact model and part requirements before installation to ensure correct fit and dependable performance.

Using a genuine Glow-Worm heat exchanger door seal helps maintain proper combustion chamber integrity, supports efficient boiler performance, and contributes to the long-term reliable operation of your central heating and hot water system.