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Key Benefits Universal Compatibility: Specifically designed for McDonnell & Miller Series 21
providing compatibility with standard 208V
Bypassing a safety limit switch is never recommended outside of momentary diagnostic testing by a qualified technician
Proper installation of this Williams furnace part helps resolve common issues like "lazy" pilot flames or intermittent ignition caused by bracket vibration or displacement
this manual reset rollout switch ensures that once a fault is detected
MARS 43341 Pressure Switch Key Benefits Universal Compatibility: SpecificallyThe MARS 43341 Low Pressure Switch is a high reliability, automatic reset control designed to safeguard compressors in commercial and residential HVAC R systems. Engineered with a tamper proof construction, this SPST close on rise switch features a factory set 5 PSI cut out (open) and a 20 PSI cut in (close) for precise low ambient protection and fan cycling control. This MARS 70 series equivalent is built for direct tubing mounting via a 1 4 inch SAE