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Garmin 4212 heating up

Old 02-28-2012, 05:25 PM
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Default Garmin 4212 heating up

I recently installed a couple of Garmin 4212's.
Today I just noticed that the units get pretty warm.
The screens are warm to the touch.
And the back of the units are pretty warm to very warm in certain spots.
Once they heat up, I'm hearing a humming, what sounds like an internal fan.

Is this all normal?

I haven't noticed this before, mainly cause I wasn't really paying attention.
And today it was dead quiet on the boat, so I could hear the humming/fans(?)
Temps on the boat are no more than 75-80 deg, with no sunlight directly on them.
I'm curious what'll happen when summer warms things up even more.

Thoughts/comments?

Thx....
Old 02-28-2012, 05:38 PM
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the units will heat up, the large metal backplate with fins is a heatsink designed to dissipate heat from the unit. proper mounting will enable the unit to cool itself properly. with most computer components, when the item gets too hot, errors start to occur and are very noticeable. some units will go into a self protect mode and shut off to cool down and prevent damage. I'd consider adding ventilation to the cavity behind the unit, but it may be operating at an acceptable temp. i believe there is an internal fan in the 400 series. I'd call garmin first to make sure. their customer support is fantastic.
Old 02-28-2012, 07:31 PM
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I've noticed it too. And for those who haven't actually touched one, it's pretty damn hot. ;?
Old 02-29-2012, 04:11 AM
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Originally Posted by CME View Post
I've noticed it too. And for those who haven't actually touched one, it's pretty damn hot. ;?
It is, but all of the Garmin 4000/5000/6000/7000 I have used do the same. So it seems like that is the design.
Old 02-29-2012, 05:07 AM
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Interesting, I haven't noticed any excessive heat and I have a 4208 and 4212. Are you sure the unit is getting adequate voltage?
Old 02-29-2012, 08:49 AM
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My 5215 never got hot, it was warm as excpected after running for a long time with everything on (radar, sonar, wx....). But I did notice one day when the sun was hitting it, that grey color plastic was REALLY hot from the sun.

My new 7215 doesn't even seem to get warm.
Old 02-29-2012, 12:34 PM
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My 6208 doesn't run as hot as my 4208 did.
Old 02-29-2012, 01:57 PM
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Well, a call to Garmin Tech support provided some insight....

It seems the screen brightness/dimming feature, when turned to auto, will cause the unit to continually adjust and fluctuate to give the best brightness for the current conditions. This causes the unit to "work" harder than with just a fixed brightness.

This sounds like it makes sense, and since just the other day I toggled the unit to auto-dimming.

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