Ideal Pump Kit 182456 (D0791)

The Ideal 182456 Pump Kit (D0791) is a circulation pump assembly supplied by Ideal for use in the Isar + Programmer HE range of gas boilers. The pump moves primary water around the heating circuit and through the boiler's heat exchanger, so it is central to both central heating and domestic hot water production on these appliances. It is listed by the manufacturer under the designation D0791.

• The pump runs noisily, grinds or hums loudly during a demand for heat or hot water.
• The boiler fires but the heating circuit or hot water does not heat up, indicating poor or no circulation.
• The boiler locks out or overheats shortly after ignition because primary water is not being moved.
• The pump head is dead — no vibration or sound when the boiler calls for heat.
• Water is weeping from the pump body, gasket face or connections.

• Confirm the appliance model from the data badge — this kit is listed for the Isar + Programmer HE24, HE30 and HE35.
• Check the existing pump and part number against the manufacturer's parts list for your appliance.
• Isolate the electrical supply and the water connections before removing the old pump.
• Check the system water condition and inhibitor level, as debris and poor water quality are common causes of pump failure.