Ideal Injector Kit 4.3 176890

The Ideal 176890 Injector Kit 4.3 is a metering injector assembly supplied by Ideal for use in its domestic and commercial appliance ranges. It sits within the combustion air and fuel path and controls the flow rate through the injector, which in turn supports stable, repeatable combustion across the appliance's operating range. The kit is listed under the Ideal Spares brand and is the part referenced by MPN 176890.

• Combustion readings that drift outside the figures given in the appliance's installation and servicing manual, with no other obvious cause.
• An unstable or uneven burner flame, including lifting, yellowing or a flame picture that changes between services.
• Soot deposits or discolouration around the burner and heat exchanger, which often points to incorrect injector flow.
• Repeated ignition failures or lockouts that persist after the usual ignition and gas pressure checks have been carried out.
• Visible damage, blockage or debris in the injector orifice when the burner assembly is stripped down.

• Confirm the appliance model and GC number against the compatibility list, as the same appliance family can use different injector sizes.
• Check the existing injector marking and compare it with the 4.3 specification before fitting.
• Note the alternative part number 1782575 in case the original number has been renumbered on the appliance data badge or in older literature.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.