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Honeywell pressure switch
Has anyone noticed a lot of these Honeywell pressure switches failing on Luxaire/York furnaces? Its the one that measures pressure difference between the exaust and intake on direct vent systems.
The switch I'm looking at is a model 9371-DO-HS-0010 and it has failed already in less than a year after replacing the first time. Now, giving it a bump will get it working again for a while until it sticks again (sounds real safe, right?).
Single pipe quasi-vapor system.
Typical operating pressure 0.14 - 0.43 oz measured with Magnehelic. High pressure limit set to 1oz. Weil-McLain EG-40 rated for 325sqft intentionally connected to 392sqft of radiation via two 2" risers into a 3" drop header and 2" equalizer. ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
Steam system pictures updated 1/25/15.https://picasaweb.google.com/thetube0a3/Boiler?authkey=Gv1sRgCImUxIqv9436MQ#