Jacuzzi HN250C/400C Hot Surface Ignitor (726158) is a replacement service part for replacement hot surface ignitor for compatible Jacuzzi HN250C and HN400C heater models. 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 fails to ignite and the ignitor has been identified as the service issue. Confirm heater model compatibility and have installation completed by a qualified 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 726158 before purchase