arizonakid
Stow Mass. USA
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My newly acquired 10 year old Sierra has a Magnetec 7345 converter in it... It seems to work OK, charges the battery with correct voltage, lights the lights, etc...
When plugged in to shore power (120 VAC) and nothing on (just charging the battery) it is quiet.
When I turn on 4 interior ceiling lights the fan will come on. It does this whether the outside temp is 70 or 90 F
Is this normal for this model?
(The converter in my last RV did not do this, though I don't recall the make or model. Which is why I ask.)
I did a search but could not find the answer to my question. Thanks for any information.
Tom
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donn0128
Pronounced Ore-gun
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Sounds normal. The fan is there to cool the circuit board. It is controlled by a thermal switch.
Donn,Lorri,Max (The Rescued Lab)
Resident Know It All 
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Gooseneck
Waynesville, NC, USA
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Joined: 07/19/2004
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My Magnetec 7345 did the same thing and also made an annoying hum most of the time. It had a large transformer in it which generated a lot of heat causing the fan to run a lot. I replaced the whole unit with a solid state one 5 or 6 years ago and solved the problem. By the way, mine stays plugged in 24/7/365 when not being towed.
Gooseneck
2003 F350 4DR DRW w/7.3PSD 4WD
Upfitted/Updated Dutchmen 30' 5er
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ScottG
Bothell Wa.
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Joined: 02/25/2005
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It's when it stop running at all that you have to be concerned. That's what my old 6345 did and burned it self up.
Scott, Grace and Wesly
2003 Dodge 3500 4x4, 6 speed Cummins (lightly bombed),
2004 Forest River 25RKS many, many mods.
H0NDA eu2000i
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pulsar
Lewisville, NC
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Moved from Forum Technical Support to Tech Issues.
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smkettner
Southern California
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Normal for about all converters. Consider LED lights to reduce power draw and fan activity.
2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675 watts solar
Send a PM if I missed something
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arizonakid
Stow Mass. USA
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Thanks guys, sounds like the fan running a lot is normal for the Magnetec.
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Clay L
Sioux Falls, South Dakota
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I have the same converter and it does not run all the time unless it gets crudded up.
I have found that I have to vacuum it in place or take it out and blow air through it once a year or so to get the pet hair and dust out so it doesn't get hot enough to turn the fan on all the time.
We had two Shelties and a long haired cat that have now passed on and Katie cat is a short haired cat so it may not have to be done as often now.
Clay (WA5NMR), Lee (Wife), Katie (cat).
Full Timing in a 2004 Winnebago Sightseer 35N, Workhorse chassis, Honda Accord toad
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