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    mgdgold's Avatar
    mgdgold Posts: 1, Reputation: 1
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    #1

    Oct 14, 2010, 03:41 PM
    What is a hot box and how do I replace it if it's bad?
    I have a gas wall furnace heater (not central air). The gas company tech said that my Hot Box (or Burn box) is cracked or ruptured. I also noticed there are popping sounds when the is running. What is a hot box and how do I replace it if it's bad?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Oct 14, 2010, 03:53 PM
    The gas burns inside a plenum that has chambers in it-AKA the burn box or heat exchanger. If the exchanger is cracked, you are going to have a carbon monoxide problem, very dangerous and life threatening. It is probably cheaper to replace the heater with a new one than replace the exchanger.
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