The Worcester 87172077470 Control Box HT3 is a genuine replacement electrical enclosure assembly designed to house and organise the key control and safety components of your boiler. This control box provides a secure, structured environment for printed circuit boards, relays, wiring looms, switches and sensor interfaces, helping protect them from dust, vibration and accidental contact while allowing easy access for servicing and diagnostics. A correctly functioning control box supports safe operation, reduces the risk of electrical faults and helps maintain tidy, dependable internal wiring.

This control box is compatible with specific Worcester and Worcester Bosch boilers that specify part number 87172077470 in their parts documentation. To ensure correct fitment and reliable performance, always verify the part number on your existing control box or consult your boiler’s service information before installation, as enclosure designs and mounting points vary between models and system controls.

Supplied ready for direct replacement, the 87172077470 Control Box HT3 integrates with the boiler’s existing wiring harness and internal components without modification when installed by a qualified engineer. Choosing this genuine Worcester Bosch component helps restore proper electrical organisation and protection, supports safer, more reliable operation and simplifies future maintenance in compatible boilers.