Siemens Building Technology GCA121.1U Actuator 321042-401 This is typically caused by
Description
Siemens Building Technology GCA121.1U Actuator 321042 401 This is typically caused by This is typically caused by a failing thermocouple that can no longer generate the 25û30 millivolts required to hold the pilot valve open this component provides the high startup torque required for the compressor and outdoor fan motor to reach operating speed quickly
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