Armstrong Furnace R604221-01 Switch functioning as a normally closed
SKU 55685706274 · ★ 4.3
USD45.90
USD90.90
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Armstrong Furnace R604221 01 Switch functioning as a normally closed functioning as a normally closed SPST circuit that opens on temperature rise to prevent equipment damage during restricted airflow or over firing conditions If you experience continued flow when the branchline pressure is at the maximum (30 psi safe air limit)
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