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necessary O-rings
the ASD series is compatible with CFC
As a veteran-grade HVAC furnace part
OEM Armstrong parts include the necessary set screw
Lochinvar 100170641 Limit Switch 100170641 Freon necessary O-ringsThe Lochinvar 100170641 Limit Switch is a critical safety component designed for high performance hydronic systems, serving as the direct OEM replacement for the obsolete TST30010. Engineered with an operating range of 30 210F, this auto reset high limit switch monitors internal water temperatures to prevent catastrophic overheating in Lochinvar Copper Fin II boilers and pool heaters. When temperatures exceed the 210F threshold, the switch opens the
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