Bosch 8733956891 Main Control Board

- Main control board that drives the inverter and core electronics of compatible heat pump systems.

- Manages compressor operation, power regulation, and variable speed switching for efficient performance across the full load range.

- Large finned aluminum heatsink covering the power stage to dissipate heat under continuous inverter duty.

- Two high-capacity electrolytic capacitors rated for 105°C operation.

- Copper toroidal chokes that filter and stabilize the power supply.

- Onboard digital display for setup and diagnostic codes during installation and service.

- Includes thermal compound, mounting screws, cable grommets, and a grounding lead.

- Alternate part number 8-733-956-891.

Fits These Bosch Models:
- BOVA24-15 (3 Ton).

- BOVA36-15 (3 Ton).

The Bosch 8733956891 is a main control board that drives the inverter and core electronics of compatible heat pump systems, managing compressor operation, power regulation, and the variable speed switching that lets the unit run efficiently across its full load range. A large finned aluminum heatsink covers the power stage and carries heat away from the switching components, allowing the board to hold up under the continuous electrical demand of inverter duty without overheating, which is what equips it for the heavy, ongoing workload of a heat pump. Supporting the power section are two high-capacity electrolytic capacitors rated for 105°C operation along with copper toroidal chokes that filter and steady the supply, while an onboard digital display reads out setup and diagnostic codes during installation or service. The board ships as a complete replacement, packaged with thermal compound, mounting screws, cable grommets, and a grounding lead so it can be fitted directly into the equipment.