A Trane SEN01842 Float Switch detects rising liquid levels and opens the control circuit to protect the unit from overflow-related issues.
The float switch monitors liquid level and opens or closes the control circuit at a set point to protect and regulate operation within the HVAC system. Its normally closed SPST design and 220F temperature rating matter because they provide dependable switching performance in wet, temperature-variable conditions common in heating and cooling equipment.
The float switch may need replacement if the heating and cooling unit shows nuisance shutdowns, failure to respond correctly to changing liquid levels or intermittent control operation. Common indicators include visible corrosion, sticking movement, cracked housing, moisture intrusion or heat-related wear that could affect reliable switching.
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