The Lennox 15M20 pressure switch turns your HVAC unit on or off according to detected pressure changes. It is designed to open on a pressure drop of -0.10" W.C. This SPST-N.O. switch monitors inducer airflow and prevents ignition if safe venting isn’t established. It fits popular SGC120H4-02, SGC120H4-03, SGH120H4-01 units and more.
- Genuine OEM Replacement Part
- SPST N.O. Snap acting
- Normally Open Contact to Actuate at 0.10" +/- 0.05 W.C. on Pressure Fall
The Lennox 15M20 is an authentic OEM draft or pressure switch built for Lennox furnaces and rooftop units.