Jacuzzi HN250C/400C Ignition Module (726156) is a replacement service part for replacement ignition module for compatible Jacuzzi HN250C and HN400C heaters. This component helps restore the fit, function, or control expected from the original Jacuzzi Whirlpool Bath equipment when the installed part is worn, damaged, missing, or no longer operating correctly.Use this part when the heater ignition system has failed or the module has been diagnosed as defective. Confirm heater model and electrical compatibility before installation by a qualified service technician. For best results, compare the existing component, equipment model, and installation requirements before ordering or beginning repair work. Replacement part for compatible Jacuzzi Whirlpool Bath equipment Designed for the listed model or application shown in the product title Useful for repair, rebuild, or routine service work Helps restore proper fit, operation, or equipment appearance Verify part number 726156 before purchase