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Is it normal for a new Trane home air handler transformer to hum and be very hot when the air handler is not running or did the repair man connect some wires improperly. The unit runs and cools great.?
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∙ 14y ago
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Air handler
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yes that is typical for a transformer to hum like that your unit might be to close to your return air and it could be loud due to maybe there is no flex duct work or maybe there is not a return air can that is insulated so many different variables hard to tell with out seeing the job and inspecting
Yes, the transformer will feel warm always whether the unit is operating or not, but the humming is not normal. You say the transformer is very hot, that is not normal either. If the unit is operating properly there most likely were no wiring mistakes but if there is any peripheral equipment added like an electronic air cleaner, humidifier,etc. The installer should have replaced the transformer with a larger one to compensate for the additional load on it. You may also want to verify that the primary voltage feeding it is correct.
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∙ 14y ago
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