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

    Jan 23, 2013, 06:49 PM
    Warm plug in transformer in Ademco home alarm system
    My Pittway Class 2 plug in transformer for my home alarm system was warm and turned brown. Today I replaced it with a new transformer(exact same type) and within a few hours it has starting getting warm again. Is that normal? When I unplugged the old one I notice that the outlet cover was a little dark. Is that a sign that the outlet needs to be replaced or a result of the old transformer? This is an Ademco alarm system that is around 10 years old. The battery was replaced a little over a year ago. Should I be concerned with the new transformer getting warm so soon after being plugged in. 120V 0.3A 16.5VAC 25VA

    Mike
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Jan 23, 2013, 10:15 PM
    Transformers operate on inductance and as such create heat when drawing power.
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #3

    Jan 23, 2013, 10:48 PM
    An alarm system should not draw enough power to cause a transformer to be warm. Suggest you have the system checked for a possible short to ground.
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
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    #4

    Jan 23, 2013, 11:58 PM
    Or possible faulty battery charger circuit.
    Kyle_in_rure's Avatar
    Kyle_in_rure Posts: 341, Reputation: 10
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    #5

    Jan 24, 2013, 05:00 AM
    You might want to get it checked, like hkstroud mentions. However, I have seen a similar situation twice, one in a residence and one in a business. These transformers have a tendency to get pretty warm. I would get it checked just to be safe.
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