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or no longer directing flow as expected
Helps restore secure snap-in attachment
Designed for compatible hull cleaner applications
even a modest drop in performance can make the spa feel less dependable than owners expect
Hayward CZ/HM/HM2 Thermostat w/o Knob (CHXTST1930) horizonventures or no longer directing flowThis thermostat is used on compatible Hayward CZ, HM, and HM2 heater systems where temperature regulation hardware needs replacement but the control knob is not required. It is a practical service part for restoring proper heater response when the existing thermostat is worn, inconsistent, or no longer controlling the system correctly. For pool and spa heaters, small control components can make a noticeable difference in comfort and reliability.
