排气管是室内热空气向外排,应该不会有冰菱。应该是进气管头有冰菱。暖炉启动需要气流顺畅。
Bryant furnace error code 31 means the pressure switch isn't working correctly, often due to blockages in the intake/exhaust vents, a clogged condensate drain, a faulty inducer motor, or issues with the switch itself or its pressure tubes, requiring...