Ideal Wiring Harness Mains 100kW 176217

This is the mains wiring harness supplied by Ideal for its commercial boiler range, carrying the part number 176217. It is listed by the manufacturer as a harness main for 100kW appliances, meaning it forms the primary electrical link between the incoming mains supply and the appliance's control and safety circuits. It belongs to the Ideal Commercial family of parts used across the Evomax and Instinct Heat platforms.

• The appliance fails to power up or drops out intermittently with no obvious fault at the isolator.
• Visible damage to the harness: chafed, cracked or heat-discoloured insulation along the run.
• Discoloured, scorched or loose spade terminals and plug connectors at either end of the harness.
• Repeated low-voltage or communication-type faults that clear when the loom is moved or reseated.
• Moisture ingress or corrosion on the connector pins, common where a harness runs close to a condensate route.

• Confirm the GC number on the appliance data badge against 41-750-37A before ordering, as the same harness body can differ between output ratings.
• Check the existing harness against alternative number 1782298 to make sure you are matching the correct loom.
• Isolate the electrical supply at the fused spur and prove dead before removing the old harness.
• Inspect the mating plugs and any grommets or cable clips during removal, as these are often disturbed when a harness is replaced.