Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Glow-worm Heat Exchanger Door Seal GLOWWORM801635

Glow-worm

Glow-worm Heat Exchanger Door Seal GLOWWORM801635

Glow-worm 801635 heat exchanger door seal for the combustion chamber and heat exchanger section of Glow-worm boilers.

At a glance

  • Part type: Heat exchanger door seal / combustion chamber seal
  • Also known as GLOWWORM801635
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
801635
Showing prices

£41.16

£34.30 ex. VAT · VAT at 20%

In stock
Cut-off passed — dispatches next working day
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Glow-worm 801635 is a door seal for the heat exchanger section of a Glow-worm boiler. It sits at the combustion chamber door, where it closes the joint between the door and the heat exchanger body, keeping combustion products inside the flue path and stopping air from being drawn in at the joint.

Glow-worm boilers can be built with more than one type of heat exchanger, so the seal must be matched to the unit actually fitted to the appliance. This seal is listed for the heat exchanger section and is also referred to as a combustion chamber seal or service seal.

Signs this part needs replacing

  • Visible cracking, hardening or flattening of the seal material at the heat exchanger door
  • Soot staining or heat discolouration around the door joint, indicating combustion products escaping
  • A flue gas or combustion smell near the appliance casing
  • Water weeping or condensation tracking from the heat exchanger door area
  • Seal damage found during a service or combustion analysis when the door is opened

Before you order

  • Check the boiler model and GC number against the compatibility list, as more than one heat exchanger type may be used across the range
  • Confirm the part number 801635 matches the seal removed from the appliance
  • Inspect the door and its fixings while the seal is off, and replace any other seals disturbed during the job
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.