018853F | Raypak Temperature Sensor Limit For Avia 264A & 404A Raypak heater Protek sheild Hayward S164T

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018853F | Raypak Temperature Sensor Limit For Avia 264A & 404A Raypak heater Protek sheild Hayward S164TThe Raypak 018853F Temperature Sensor Limit Kit is a vital OEM safety component for Avia 264A and 404A gas fired heaters. This kit monitors temperature differentials to detect overheat or unsafe operating conditions, triggering shutdown or fault signals to protect the heater. Designed with precision sensors and temperature limit hardware, it helps maintain heater reliability, safety compliance, and proper performance under varying load and water flow