The Lochinvar spark ignitor is designed for compatible EnergyRite heater applications in the 152 through 402 range where dependable ignition is needed. A spark ignitor is useful because it helps initiate burner startup, supporting more reliable heater operation and consistent system performance.This replacement is especially useful when the original ignitor is weak, cracked, damaged, or no longer sparking correctly. Replacing the ignitor can help restore dependable startup without replacing the larger heater assembly.The 100165932 is a practical service part when a compatible Lochinvar EnergyRite heater needs a spark ignitor to restore dependable ignition performance. Lochinvar spark ignitor Fits compatible EnergyRite heater models 152 through 402 Helps restore dependable burner startup Useful when the original ignitor is damaged or failing Supports cleaner and more dependable heater operation