Ideal Header Thermistor Lead 176289

The Ideal 176289 is a header thermistor lead supplied by Ideal for use on Ideal Commercial appliances. It is the wiring lead that connects the header thermistor to the appliance control, carrying the temperature signal that the control uses to monitor the header circuit. The lead is listed by the manufacturer under part type Thermistor Lead and is also referenced under the alternative number 1180371.

• Temperature readings at the control are erratic, or the displayed value jumps around instead of holding steady.
• The appliance locks out or shuts down shortly after firing, with a fault code relating to the header or temperature sensing circuit.
• Heating or hot water output is inconsistent because the control is acting on a faulty temperature signal.
• The lead shows visible damage — cracked insulation, a broken or corroded terminal, or a conductor pulled out of its crimp.
• Continuity testing across the lead fails, or resistance readings change when the lead is flexed.

• Confirm the appliance model and serial number against the compatibility list before ordering, as Ideal Commercial assemblies vary between ranges.
• Check the lead currently fitted against the alternative number 1180371 to make sure the replacement matches.
• Inspect the thermistor and its connection point at the same time; a damaged terminal or contaminated sensor can cause the same symptoms as a failed lead.
• Work on the appliance only with the power isolated, and follow the manufacturer's instructions for the specific model.