Buderus GB062, GB022 - Bosch Condens 2500 Combi Boiler 3-Way Valve Stepper Motor 24V (Elbi 8718644564)

Three-way valve stepper motor for Buderus Logamax Plus GB062 / GB022 and Bosch Condens 2500 W combi boilers: made by Elbi, 24 V DC, Bosch original part number 8718644564 (Elbi 31600028.08, T70). It is the motor that switches between domestic hot water and heating; when it fails, there is no hot water or the combi boiler gets stuck in heating mode. Before ordering, compare the 24 V and 31600028 markings on the label of the removed motor.

The Elbi 3-way valve stepper motor (diverter motor) is the electric drive motor that changes the water direction between the domestic hot water and the central heating circuit in Bosch and Buderus combi boilers. By positioning the combi boiler's 3-way valve step by step and precisely, it ensures that the appliance operates in the correct mode: when hot water is running from the tap it directs the water to the cylinder/heat exchanger, and in heating mode to the radiators. It is a 24V-powered, Italian-made, long-lasting spare part.

3-Way (Diverter) Stepper Motor for Bosch / Buderus Combi Boilers

It is the compatible model of the motor with original codes 31600028.05 / 31600028.08 and Bosch 8718644564 (T70 type). It drives the 3-way valve with the signal coming from the combi boiler's main PCB; when it fails, symptoms such as no hot water, staying permanently in heating mode or getting stuck when switching modes are seen.

Technical Specifications

• Brand: Elbi (Italian origin)
• Type: 3-way valve stepper motor (diverter motor) · category T70
• Suitability: Bosch and Buderus combi boilers
• Product Codes: 31600028 (.05 / .08 revision) · Bosch code: 8718644564
• Electrical Supply: 24V · 50/60Hz
• Function: Water diversion between domestic hot water ↔ heating circuit (3-way valve drive)

Installation and Compatibility

• Specialist installation: Replacement should be carried out by a specialist combi boiler technician; the appliance's power and water must be shut off and made safe.
• Model confirmation: It is compatible with Bosch/Buderus; still, confirm the motor body/socket type for your appliance's model and year with the 31600028 / 8718644564 codes before installation.
• Seat the connector fully; check that the motor engages the 3-way valve shaft correctly and turns freely.
• If a fault is suspected, test the motor separately; if the valve mechanism is seized, replacing only the motor may not solve the problem, so also check the valve assembly.