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Lennox Pressure switch

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Jfawson
Jfawson Member Posts: 1
in A-C, Heat Pumps & Refrigeration
Please help. Have an issue with 2 stage pancake pressure switch. No exhaust blockage. When the black positive hose is disconnected from switch the furnace seems to operate fine. I can blow freely in the positive line at receiver. Red line I’m unable to blow through at the receiver. Should I be able to blow through both receiver lines freely?  Could there be a blockage in the red hose line going into the receiver or are you not able to blow through that line. Thank you so much!! 

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  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 7,858
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    Insufficient information. Do you have model number of the Lennox.
    Are blowing thru the tube at the switch or are you blowing out the tube to the furnace?

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • Big Ed_4
    Big Ed_4 Member Posts: 2,785
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    Yes it should be free , use a paper clip to clear the tap .....

    There was an error rendering this rich post.

    EdTheHeaterMan

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