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Baxi Motor Cartridge (720003100 / 248733)
The Baxi Motor Cartridge is the core internal mechanical component used to toggle the boiler's output between the central heating circuit and the domestic hot water system. When the actuator motor pushes or pulls this cartridge, it opens or closes the flow to the plate heat exchanger. This part is a high-quality replacement for part numbers 720003100 and 248733 (also cross-compatible with 7656807 and 5118381).
Precision Switching: Facilitates the rapid transition between heating and hot water for maximum energy efficiency and user comfort.
High-Grade Construction: Built with durable materials and specialized O-rings to prevent internal leaks and resist limescale buildup.
Cost-Effective Service: Allows for the restoration of the diverter valve's function without replacing the entire brass hydraulic manifold.
Reliable Performance: Resolves common issues such as lukewarm water, or radiators heating up when only hot water is required ("let-by" issue).
Compatible Models:
Baxi Duo Tec 24 Combi ErP
Baxi Duo Tec 28 Combi ErP
Baxi Duo Tec 33 Combi ErP
Baxi Duo Tec 40 Combi ErP
Baxi 24 Combi ErP
Baxi 28 Combi ErP
Baxi 33 Combi ErP
Baxi 40 Combi ErP
PLATINUM COMBI 30HE A
PLATINUM COMBI 40 HE A
Baxi Combi Instant 105 E — 47-075-09
Baxi Combi Instant 105E HE — 47-075-19
Baxi Combi Instant 80E — 47-075-13
Baxi Combi Instant 80E HE — 47-075-17
Baxi Duo Tec 24 HE — 47-075-23
Baxi Duo Tec 28 HE — 47-075-25
Baxi Duo Tec 33 HE — 47-075-24
Baxi Duo Tec 40 HE — 47-075-26
Baxi Combi 24 HE — 47-075-20
Baxi Combi 28 HE — 47-075-21
Baxi Combi 33 HE — 47-075-22
Baxi Platinum Combi 28 HE A (After Serial No. BNC0932 Issue 7) — 47-075-32
Baxi Platinum Combi 28 HE A (Before Serial No. BNC0932 Issue 7) — 47-075-32 BEFORE
Baxi Platinum Combi 33 HE — 47-075-29
Baxi Platinum Combi 33 HE A (After Serial No. BNE1112 Issue 5) — 47-075-33
Baxi Platinum Combi 33 HE A (Before Serial No. BNE1112 Issue 6) — 47-075-33 BEFORE
Baxi Platinum Combi 40 HE — 47-075-30
Potterton Motor Cartridge (720003100 / 248733)
The Potterton Motor Cartridge is the primary internal component of the diverter valve assembly, responsible for directing heated water to either the radiators or the domestic hot water heat exchanger. Actuated by the diverter motor, this cartridge ensures that hot water is prioritized the moment a tap is opened. It is a high-quality replacement for part numbers 720003100 and 248733 (also compatible with 7656807 and 5118381).
Mode Switching Precision: Restores the boiler's ability to switch seamlessly between central heating and hot water modes.
Leak-Resistant Seals: Features high-grade O-rings designed to maintain a watertight seal under high thermal stress and hydraulic pressure.
Debris Durability: Engineered to operate reliably even in systems containing minor sludge or limescale buildup.
Mechanical Integrity: A professional-grade solution to fix "let-by" issues, ensuring radiators don't heat up when only hot water is requested.
Compatible Models:
Potterton Gold 24 Combi ErP
Potterton Gold 28 Combi Erp
Potterton Gold 33 Combi ErP
Potterton HEATMAX COMBI 24 HE
Potterton HEATMAX COMBI 28 HE
Potterton HEATMAX COMBI 33 HE
Potterton PROMAX COMBI 24 ERP
Potterton PROMAX COMBI 28 ERP
Potterton PROMAX COMBI 33 ERP
Potterton Titanium 24 Combi Erp
Potterton Titanium 28 Combi Erp
Potterton Titanium 33 Combi Erp
Potterton Titanium 40 Combi Erp
Potterton Gold 24 HE Combi — 47-590-05
Potterton Gold 28 HE Combi — 47-590-06
Potterton Gold 33 HE Combi — 47-590-19
Potterton Performa 24I HE — 47-393-12
Potterton Performa 28I — 47-393-08
Potterton Promax Combi 24 HE Plus — 47-393-17
Potterton Promax Combi 24 HE Plus A — 47-393-21
Potterton Promax Combi 24 HE Plus LPG — 47-393-24
Potterton Promax Combi 28 HE Plus — 47-590-04
Potterton Promax Combi 28 HE Plus A — 47-393-22
Potterton Promax Combi 33 HE Plus — 47-590-03
Potterton Promax Combi 33 HE Plus A — 47-393-23
Main Motor Cartridge (720003100 / 248733)
The Main Motor Cartridge is the critical internal mechanical component of the diverter valve assembly. It acts as a directional gate, controlled by the actuator motor to divert primary heated water either to the central heating circuit or the domestic hot water (DHW) plate heat exchanger. This cartridge is a professional-grade replacement for part numbers 720003100 and 248733, designed to restore full switching functionality to the boiler's hydraulic system.
Accurate Flow Direction: Ensures the boiler correctly prioritizes hot water demand, preventing heat from "bleeding" into the radiators when not required.
High-Thermal Resistance: Equipped with specialized internal seals and O-rings that maintain integrity under constant thermal cycling.
Maintenance Efficiency: Allows for the repair of the diverter valve without the labor-intensive process of replacing the entire brass manifold body.
Durable Performance: Engineered to resist mechanical sticking caused by system debris, sludge, or limescale buildup.
Compatible Models:
Main Combi Eco Elite 25 — 47-467-01
Main Combi Eco Elite 30 — 47-467-02
Main 25 Eco Elite Combi — 47-467-03
Main 30 Eco Elite Combi — 47-467-04
Main Eco Compact 25 Combi — 47-467-12
Main Eco Compact 30 Combi — 47-467-13
Main Combi 24 HE — 47-474-02
Main Combi 30 HE — 47-474-03
Main 24 System Eco Elite — 41-467-03
Main 28 System Eco Elite — 41-467-04
Baxi
A00545
720003100 248733
