Hayward Control Module, Replacement | IHXMOD1931 RTF Replacement housing access component

Replacement housing access component

Turn off the pump and relieve system pressure before servicing the relief assembly

Napoleon CSL42K Classic Black Surround for Ascent Linear 42

This switch is often replaced when heaters show vent or pressure-related fault codes

It is rarely replaced unless structural damage is present

Hayward Control Module, Replacement | IHXMOD1931 RTF Replacement housing access componentWhat This Part Is Used For The Hayward IHXMOD1931 Control Module manages ignition and operational logic in compatible Hayward heater systems. It coordinates signals between sensors, switches, and ignition components. Why This Part Matters A failed control module can prevent ignition or cause repeated shutdowns. Reliable system coordination is essential for safe heater operation. Replacing the module restores proper startup sequencing and