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57+Electronic expansion valve (EEV)Automatic defrosting featureTitanium heat exchangeand many more…
2 x Adaptor orings
23kw and 30kw
2550-380mm Black premium flashing
Replacement Options – Guidance on modern
Hayward Gas Heater High Limit Sensor 135F Heat Pump Parts 57+Electronic expansion valve (EEV)Automatic defrostingHayward High Limit Sensor 135F Genuine outlet water temperature safety switch for FD series heaters. Protects the heat exchanger by shutting down on over temp. Function: Opens at 135 F (outlet sensor) to prevent overheating. Compatibility: Hayward FD series gas heaters (50 Hz). Materials: Factory calibrated thermal switch with OEM terminals. Install: Disconnect power, swap sensor, verify continuity per spec. Maintenance: Inspect wiring and seating
