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

    Nov 8, 2016, 01:33 PM
    Bryant 395CAV furnace starts then stops - Error codes 34 and 14
    I have a Bryant 395CAV furnace.

    When I first turned it on this season, it wouldn't start. I typically have to clean the flame sensor every year, so I did that. Filter was replaced. It ran fine for a couple weeks.

    After a few days in a row of warmer weather where the furnace wasn't needed, I've started having trouble with it again. I get Error Code 34 (ignition proving failure) and then Error Code 14 (ignition lockout).

    Sequence of events is -

    Turn heat on at thermostat
    Inducer motor kicks in
    Ignitor starts glowing
    Gas kicks on
    Flame come on for a few minutes
    Flame goes out (Error Code 34 happens here)
    Cycles through a few times trying to re-light - I don't believe it's opening the gas at this - I don't hear a hiss or smell anything - ignitor is coming on as it should
    After a few attempts at relighting, furnace shuts down with Error Code 14

    I tried cleaning the flame sensor again, and then replacing it.

    I've removed the hose from the pressure switch and attempted to clean the ports. The hose itself was clean, and the ports looked clean, but I poked around with a paper clip anyway.

    I noticed that when the burner and blower covers are off, the furnace will operate normally and the flame will run until the house warms up to temp and then the cycle will end normally with no error.

    If I have just the burner cover off, it doesn't help.

    Tried once with just the blower cover off. The blower cover covers part of the burner area. It seemed to create a sort of backdraft in that the flame came out through the back of the burners for a second and then the furnace shut off.

    Is there something I'm missing, or is it just time to give up and call someone in?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
     
    #2

    Nov 8, 2016, 06:20 PM
    Try this https://www.youtube.com/watch?v=5CDF0duucpQ

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