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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
The compact design and standard mounting flange allow for rapid integration into existing control strings
Can I use an aftermarket foam tape instead
making it a staple for any HVAC repair kit
supporting both heating and cooling cycles
Manufactured from durable high-temperature gasket material to resist degradation in extreme operating conditions
MARS 39004 Switch The compact design and standardThe 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