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trane condensing furnsce eating pressure switch

Paul_69 Member Posts: 251
10 yr old trane condensing furnace that keeps holding off pressure switches and we replace and runs for awhile.no water in switches and we flush condensate tubes etc. I believe there might be something wrong inside of one of the he.15%02 3.2co2 112 co 273 xair 2.3 wc for pressure switch. Maybe condensate trappoing in he causing pressure problems as it builds up? Seems to be better after we blow tubes out. I dont believe it is 7 switches faulty. calling tech support next week.


  • don_9
    don_9 Member Posts: 395
    What are your o2 numbers before the blower fan motor come on?
  • Matt_67
    Matt_67 Member Posts: 288
    Is there any evidence of water in the top half of the furnace? I'm assuming it is an up flow furnace.
  • Paul_69
    Paul_69 Member Posts: 251
    Same o2 before blower on and during. Found out from trane the unit is 17 years old!!
  • DZoro
    DZoro Member Posts: 1,048
    keep hose sag free may help.