Boiler Parts Finder

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Bosch manufactures a wide range of hydronic boiler equipment, and replacement parts only work when the model match is exact. The fastest path to the correct gasket, sensor, control board, ignitor, or pump component starts with the boiler's model information.

SupplyHouse stocks Bosch boiler replacement parts for supported models, with a catalog that includes items like heat exchanger gaskets, maintenance kits, and control components.

Enter the model number exactly as printed on the Bosch rating plate. Model number matching is the quickest way to narrow parts lists and avoid ordering the wrong gasket, kit, control, or sensor.

Need a broader entry point across brands? Use the Boiler Parts Finder Tool hub:

Bosch boilers typically list model and serial information on a rating plate, often on the jacket or inside the front panel depending on the boiler family. A clear photo of the full plate helps capture the complete model number and serial number in one shot.

If the model number is not available, category browsing can still help narrow the field before confirming fit by model:

BoschBoiler Parts

Each unit has a unique model number, locating this number helps us get you the correct parts.

Locate Your Model Number
  • Go to the unit that needs the replacement part
  • Locate the name-plate or label from the manufacturer
  • For reference take a picture of the label with your smart phone or carefully copy down your complete model number
Search by Your Bosch Boiler Model Number:
Click on any model number to view complete parts list
KBR 16-3KBR 16-3AKBR 21-3KBR 21-3AKBR 28-3KBR 28-3AKBR 35-3KBR 35-3AKBR 42-3KBR 42-3AKWB 28-3KWB 28-3AKWB 35-3KWB 35-3AKWB 42-3ASingular 4000ZBR 16-3ZBR 16-3AZBR 21-3AZBR 28-3ZBR 28-3AZBR 35-3ZBR 35-3AZBR 42-3AZBR21-3ZBR42-3ZWB 28-3ZWB 28-3AZWB 35-3AZWB 42-3ZWB 42-3A

Frequently Asked Questions

Bosch boilers typically list model and serial information on a rating plate. Location varies by boiler family, but the plate is often on the jacket or inside the front panel.

Gaskets, sensors, ignitors, and control components show up often on service lists. Maintenance kits are another common path when multiple wear items get handled at once.

Yes. Many Bosch gaskets, kits, and controls are tied to specific equipment families and model numbers, so model matching matters before checkout.

Recheck the rating plate for the exact model number format, including hyphens and suffixes. If results still do not populate, the part request form on the page is the next step so the team can research the correct parts list.

Heat exchanger parts and related components may also appear in dedicated replacement sections, depending on product category.

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