Trane SWT3403 Pressure Switch 318973-401 Engineered with a passive PTC

Engineered with a passive PTC (Positive Temperature Coefficient) element

Direct Replacement: Fully interchangeable with the 32000109-005/U model for simplified inventory and procurement

Contractor-Friendly Maintenance: Features a manual feed button for system priming and a field-replaceable CTRD-101 cartridge kit to simplify internal valve repairs

Common Questions & Technical Support: How do I install an LV-4W wall-mounted operator

Continuous Duty Cycle: Engineered to remain energized for extended periods without overheating or failure

Trane SWT3403 Pressure Switch 318973-401 Engineered with a passive PTCThe Trane SWT3403 is a high performance OEM high pressure switch designed specifically for refrigeration and air conditioning systems where system integrity is non negotiable. Engineered to act as a critical safety cutoff, this manual reset pressure switch (or automatic depending on system configuration) monitors refrigerant pressure to protect the compressor from catastrophic failure. This specific unit is calibrated with a precise operating pressure