Coates Heater Electric Pool/Spa Heater Replacement Parts 21006010 240 V Relay for Q-12DS Flow Switch CPH PHS CE ST

The Coates Heater Replacement Part 21006010 (240V Relay for Q-12DS Flow Switch, compatible with CPH, PHS, CE, and ST Series heaters) is an essential electrical component designed to ensure safe and reliable heater operation.

This relay works in conjunction with the Q-12DS flow switch, serving as a control mechanism that allows the heater to activate only when proper water flow is detected. By preventing dry firing and protecting internal elements, it safeguards the heater from damage while maintaining consistent performance. Engineered for 240-volt systems, it integrates seamlessly into multiple Coates heater series, providing dependable switching functionality and supporting long-term operational reliability in both residential and commercial aquatic environments.