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-   -   Tempstar funace says pressure switch is open when it should be closed (https://www.askmehelpdesk.com/showthread.php?t=785881)

  • Mar 3, 2014, 08:00 AM
    kwyman82
    Tempstar funace says pressure switch is open when it should be closed
    We have a Tempstar furnace. The indicator is reading that the pressure switch is stuck open when it should be closed. The fan still kicks on but it won't light..
  • Mar 3, 2014, 08:33 AM
    Grady White
    The reason the fan comes on is it is on a timer which turns the fan on "X" seconds after the thermostat calls for heat. I doesn't know or care if the flame lit or not.

    There should be a small hose going from the exhaust blower to the pressure switch. Take it off the blower & suck very gently. If you hear the switch click, the problem is not with the switch. If the switch clicks, use a paper clip to clean out the nipple to which the hose connected at the blower & try the furnace again.

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