Ideal Hydroblock Assembly Complete 32kW 176878

The Ideal 176878 is a complete hydroblock assembly rated at 32kW, listed by the manufacturer under diverter valves and hydraulics. It forms the water-side core of the boiler, carrying the diverter section that switches flow between domestic hot water and central heating, along with the associated hydraulic components in a single factory-built unit. It is used across the Ideal Vogue C32 range and appears in Ideal Commercial parts listings.

• Domestic hot water runs cold or only warms intermittently while the heating circuit works normally
• Radiators heat up when only hot water is demanded, indicating the diverter section is passing
• Water weeping or staining around the hydroblock body, unions or the diverter housing
• Boiler pressure dropping repeatedly with no visible leak elsewhere on the system
• Fault codes or lockouts linked to diverter or hydraulic operation on the appliance display

• Confirm the appliance model and GC number against the compatibility list, as the 32kW hydroblock is specific to this rating
• Check the existing part number on the boiler against 176878 and the alternative number 1782723 before ordering
• Inspect the unions, seals and washers on removal and renew them as needed to avoid leaks on reassembly
• Work on the boiler should be carried out by a competent person, with the appliance isolated and drained as required