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    ks67216's Avatar
    ks67216 Posts: 4, Reputation: 1
    New Member
    		  
    #1

    Jan 28, 2009, 08:38 PM
    Circuit board
    I got a miller furnace and I replaced the pressure switch on it because it was giving me a code for switch stuck closed
    I replaced the switch and it still does it
    If I press on the circuit board it will come on but then sometimes it will turn on but sometimes it won't
    Can it be that my circuit board is going bad?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jan 28, 2009, 09:09 PM
    The circuit board could have some cold solder joints or a bad or loose connection or bad ground.
    bandb's Avatar
    bandb Posts: 15, Reputation: 2
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    #3

    Jan 29, 2009, 06:13 AM
    Quote Originally Posted by ks67216 View Post
    i got a miller furnace and i replaced the pressure switch on it because it was giving me a code for switch stuck closed
    i replaced the switch and it still does it
    if i press on the circuit board it will come on but then sometimes it will turn on but sometimes it wont
    can it be that my circuit board is going bad?
    Did it specify that it was the pressure switch
    ks67216's Avatar
    ks67216 Posts: 4, Reputation: 1
    New Member
    		  
    #4

    Jan 29, 2009, 10:09 AM
    Yeah some times it will say pressure switch stuck open and then sometimes it would say pressure switch stuck closed
    bandb's Avatar
    bandb Posts: 15, Reputation: 2
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    #5

    Jan 29, 2009, 10:58 AM

    Make sure your t stat is working properly it could be going bad sometimes calling for heat and sometimes not I've learned most the time it something simple hope this helps
    ks67216's Avatar
    ks67216 Posts: 4, Reputation: 1
    New Member
    		  
    #6

    Jan 30, 2009, 04:48 PM
    Well I t doesn't lose signal from the stat
    I checked he W in the board
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