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Open Roads Forum  >  Class A Motorhomes

 > power converter is running all the time when pluged in ??

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Cajunco

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Posted: 02/25/12 03:03pm Link  |  Print  |  Notify Moderator

My Converter makes a humming noise all the time ( not loud) but i can hear it ...i keep my Coach plugged in all the time...
is it suppose to make this noise even when nothing is on?
Thanks


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skipnchar

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Posted: 02/25/12 03:10pm Link  |  Print  |  Notify Moderator

It's probably still charging batteries, operating sensors like the CO or LPG sensor and operating thermostats like fridge, water heater etc.


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Craig P.

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Posted: 02/25/12 03:11pm Link  |  Print  |  Notify Moderator

If it's a converter/chrarger, then it is probably just keeping your batteries charged. This is why it's a good idea to check your electrolyte level monthly.

Craig


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tktplz

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Posted: 02/25/12 03:37pm Link  |  Print  |  Notify Moderator

Craig P. wrote:

If it's a converter/chrarger, then it is probably just keeping your batteries charged. This is why it's a good idea to check your electrolyte level monthly.

Craig


Yup, check you electrolyte level in your batteries. Mine started turning on the fan when I'd turn on the lights last August while plugged in. I thought, "How odd". Well I went out to check on it a couple weeks later in the garage and had cooked the battery. 1/3rd of the electrolyte was gone, OUCH. Thankfully my battery dealer had 125 Ahr AGM's "Blems" for 136.50 out the door.


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Cajunco

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Posted: 02/25/12 05:14pm Link  |  Print  |  Notify Moderator

Ok Thanks guys ! ! :-)

bluwtr49

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Posted: 02/25/12 05:22pm Link  |  Print  |  Notify Moderator

Perfectly normal.


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wa8yxm

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Posted: 02/25/12 05:45pm Link  |  Print  |  Notify Moderator

The power converter does, in fact, run all the time when it is plugged in. It is supposed to.

There are, for the purpose of this post, basically two types of converters, Modern 3-stage converters are USUALLY switching power supplies, I won't go into how these work but they do not usually hum at you.

Some older units have a big iron core transformer, These may be multi-stage, or not, The core is made of layer after layer of iron "Leaves" which are varnished. The varnish holds them together, but with age and heat and vibration (induced by the magnetic field of the coils) the varnish fails and the leaves vibrate.. and hum at you.

It does NOT indicate a problem.


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