Question about Intermatic Malibu 300W Power Pack Transformer ML300RTW

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Transformer is Humming loudly, how do I stop - Intermatic Malibu 300W Power Pack Transformer ML300RTW

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Copy following link for general troubleshoot and tips, and warranty information, and trippers.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

ML300 series transformers make sound.
Some make more sound thAn others.
Used styrafoam to separate transformer from contact with building so sound is not carried.
These transformers have 10 year limited warranty.


If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Posted on Oct 24, 2012

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Posted on Jan 02, 2017

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1 Answer

How do I stop constant loud humming and buzing sound from transformer


Transformers make noise..
If transformer is buzzing, then it has probably gone bad.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

Gene

Water Heater Timers Save Money

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

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Loud huming from my 300v low voltage lighting transformer


Transformers make humming sound.
ML300 series transformers make sound.
Used styrafoam to separate transformer from contact with building so sound is not carried.
These transformers have 10 year limited warranty.

Copy following link for general troubleshoot and tips, and warranty information, and trippers.
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

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1 Answer

My JES636WK01 microwave heats up but it makes a loud humming noise. I suspected the Magnetron and disconnected it. The microwave was then operated and the n oiuse was the same. Do you have any ideas


Disconnect the HV transformer leads from the magnetron and the capacitor. Make sure none of the wires are touching the chasis or other parts. If the loud humming sound is still present, it is the High Voltage transformer making the noise. If the noise goes away, it is the High Voltage Capacitor going bad.

*MAKE SURE TO UNPLUG UNIT BEFORE TOUCHING ANY OF THE HIGH VOLTAGE LEADS! ALSO, DISCHARGE THE CAPACITOR BY SHORTING THE TWO SIDES AGAINST EACH OTHER!

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1 Answer

Everthing works but the heat and it makes a loud humming noise.


The magnetron has shorted probably loading down the high voltage transformer where the humming is coming from. It is cheaper to replace the oven than have it repaired.

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Humming sound when on/off


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if loud recommend replacement of power supply.
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1 Answer

It is making a humming noise but not heating.


sounds like a crack in the magnetron
a bad transformer
or a bad rectifier
sorry i cant be more help

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Loud humming noise


Usually a humming noise is a transformer going bad.

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Loud humming


If this is an electric resistance heater then there is no power supply or transformer. I had a baseboard heater that would hum loudly and I found there's a wire that runs along the bottom to connect the far end of the heat element to the electrical wiring at the supply end. This wire becomes magnetized from the current flowing through it and vibrates in the channel it runs through. I was able to open this channel and squirt a bit of silicone caulk in to keep the wire from vibrating and the hum is gone.

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