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Are they "humming a happy tune"?
If so leave them alone, they are happy!
OK, so transformers naturally try to vibrate, thus the "hum", because they are basically a magnet alternating polarity at 60 times a second.
Over the years, the glue or enamel that holds the windings in place can loosen, thus increasing the vibration and the humming. Normally it is not a problem, but it can over the years result in the failure of a transformer.
I would not worry right now. You could go inside and make sure the transformer is tightly bolted to the chassis.
Regards, Greg
If so leave them alone, they are happy!
OK, so transformers naturally try to vibrate, thus the "hum", because they are basically a magnet alternating polarity at 60 times a second.
Over the years, the glue or enamel that holds the windings in place can loosen, thus increasing the vibration and the humming. Normally it is not a problem, but it can over the years result in the failure of a transformer.
I would not worry right now. You could go inside and make sure the transformer is tightly bolted to the chassis.
Regards, Greg
