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    wwcordes's Avatar
    wwcordes Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 5, 2009, 11:30 AM
    Miller CMF2 Oil furnce cycles too much on cool down
    I have a Miller Oil Furnace, Model # CMF2-80(PO), S# cma06/20058. It works great... once the burner shuts off, the fan continues to run until it reaches the low limit setpoint - but then it will cycle the circulating fan on and off between 9 to 12 times before it shuts down completely... takes about 1.5 minutes of this annoying cycling to turn off completely. The blue limit (electronic) setpoint label says F115-20F (part # 626552). I'll assume it takes the heat exchanger temperature down to 115F, with a 5 degree varance? Is this a flaw in the Miller design or do I have a bad limit swith or ? Woud a different switch with a greater variance stop this problem? Walter Cordes, Cedarville Michigan. [email protected]
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jul 5, 2009, 04:18 PM
    Go here and post your question under Nordyne. Nordyne bought Miller. They also have parts available if you need one.

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