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The RECTORSEAL M43367 is a high pressure switch designed to monitor and protect refrigerant circuit integrity in HVAC and refrigeration systems. The switch opens its electrical circuit when system pressure exceeds a set threshold, cutting power to the compressor or control circuit to prevent equipment damage from an over-pressure condition. Licensed HVAC technicians install this component as part of system safety controls during new installations, retrofits, and compressor replacements.
The M43367 is suited for residential and light commercial HVAC and refrigeration applications where high-side pressure monitoring is required. It is typically installed on the high-pressure line of split systems, package units, and refrigeration equipment to provide automatic shutdown protection during abnormal operating conditions.
Designed as an OEM-style replacement high pressure switch for residential and light commercial HVAC and refrigeration systems. Consult system documentation or manufacturer specifications to confirm fitment before installation.
Installation should be performed by a licensed HVAC technician with EPA Section 608 certification where refrigerant handling is involved. Recover system refrigerant and de-energize all electrical circuits before removing or installing the pressure switch. Follow applicable local codes and the equipment manufacturer's service guidelines when routing wiring to the switch terminals. Verify rated pressure range compatibility with the refrigerant and system design before commissioning.
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