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Thread: I am getting code 12 error on Bryant 355MAV042080

  1. 12-12-2005, 02:07 AM #1
    markis7
    markis7 is offline Regular Guest
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    Occasionally I am getting code 12 error on Bryant 355MAV042080 furnace controlled via Evolution Control.
    Unit seems to be working just fine. How serious the problem is?

    Thanks,
    Mark
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  3. 12-12-2005, 06:10 AM #2
    troyorr
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    What is a code 12?
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  4. 12-12-2005, 07:55 AM #3
    1-Hvacdoc's Avatar
    1-Hvacdoc
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    code 12 is not an error code. it signals blower on after power up w/ a call for heat. blower runs for 90 seconds, then goes back to heat cycle.
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  5. 12-12-2005, 09:48 AM #4
    markis7
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    Do I need to do anything with it or just leave it alone? My blower runs continuously, would it cause it?

    Thanks,
    Mark
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  6. 12-12-2005, 06:48 PM #5
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    1-Hvacdoc
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    soory may have gave you bad info. I believe code 12 0n that furnace is BLOWER CALIBRATION LOCKOUT—This fault indicates that blower motor speed calculated for low heat is
    either less than 250 RPM or greater than 1300 RPM on 2 successive attempts at calibration. Control will
    auto-reset in 3 hours.

    Best call for service.
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