INTERLOCK SWITCH | IHXILS1930 The Hayward Interlock Switch (IHXILS1930) is a safety mechanism in Hayward pool heaters that prevents unsafe operation by ensuring critical components are properly engaged before allowing ignition. Monitors Safety Conditions: The interlock switch ensures that conditions (such as proper venting, water flow, or closed access panels) are met before allowing the heater to start. Prevents Unsafe Operation: If the switch detects an issue—like an open panel, improper airflow, or another safety concern—it interrupts the ignition sequence, preventing the heater from turning on. Works with Other Safety Features: These are often used alongside pressure switches, vent safety switches, and limit switches to ensure the heater operates safely.
