Johnson Controls T-4003-201 Thermostat 30067439-890 it ensures seamless communication between
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Johnson Controls T 4003 201 Thermostat 30067439 890 it ensures seamless communication between it ensures seamless communication between the electronic aquastat and the immersion well This high limit thermostat is essential for preventing blower motor failure or heat exchanger damage by interrupting the heating cycle during over temperature conditions