OEM Lennox High Pressure Switch — 27W13
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The genuine OEM Lennox 27W13 high pressure switch guards your Lennox system against dangerously high refrigerant pressure on the discharge side of the compressor. When high-side pressure climbs past the factory setpoint — often due to a dirty condenser coil, failing condenser fan, overcharge, or restricted airflow — the 27W13 opens the circuit and shuts down the compressor before damage occurs. It is precision-calibrated to Lennox's specified cut-out and automatic reset points.
Common failure symptoms: A faulty 27W13 can cause repeated high-pressure lockouts, a compressor that trips off shortly after starting, intermittent no-cool conditions, or a switch that fails to reset. A shorted switch defeats overpressure protection entirely and puts the compressor at serious risk.
Why OEM matters: Lennox engineers this switch to trip at exact pressure thresholds matched to your unit's compressor and coil design. Generic replacements frequently use incorrect setpoints that cause nuisance trips or fail to protect at all. Installing the authentic OEM 27W13 ensures proper calibration, terminal fit, and long-term reliability for your Lennox equipment.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days