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restricted airflow
When troubleshooting pressure switch lockout or incomplete combustion issues
suitable for various commercial HVAC maintenance tasks
" where flames exit the heat exchanger
25 inch female quick connect terminals on both ends
MARS 39004 Switch restricted airflowThe MARS 39004 is a professional grade 390 Series SPDT Changeover Switch designed for automatic seasonal transition in hydronic heating and cooling systems. Specifically engineered for fan coil units, this summer winter changeover switch manages thermostat logic based on water temperature, ensuring seamless climate control without manual intervention. It features a high reliability SL 8 thermostat enclosed in a sealed case for environment protection
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