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Old 09-19-2016, 03:49 AM   #15
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Originally Posted by Nut4speed View Post
Try disconnecting the battery all together and remove all other load. If the fan stays running then it's likely a bad thermal switch. If it stops with the battery disconnected I would start adding some load back on (battery still disconnected) with low draw devices first (fridge, led lights, etc) and if it still doesn't come on then my guess is you've got a bad battery that the converter is constantly trying to charge.
I will give this a try. If it is a bad thermal switch, can this be replaced or is it time to buy a new converter?
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Old 09-19-2016, 04:20 AM   #16
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It can be replaced if you know how to solder parts on a circuit board.

FWIW I'd ignore it or look for a multi stage converter with about the same amp rating.
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Old 09-19-2016, 06:43 AM   #17
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It can be replaced if you know how to solder parts on a circuit board.

FWIW I'd ignore it or look for a multi stage converter with about the same amp rating.

Agree in both points. If you feel comfortable diagnosing a component on The controller board you could probably find the relay. Not sure you'd be able to find a replacement part but that's another story.

One more step to diagnose the problem Either take your battery into our automotive shop to get it tested or put it on the charger disconnected from the RV until the charger shows it's good.

Then reconnect to the RV. If the fan still runs then likely the controller board. (~$100). The controller board is fairly straightforward to replace.

If you plan to keep the trailer I would strongly encourage you to get a better cconverter/charger as mentioned above.

But note a new converter charger will be a nasty rewire mess. Not impossible just time consuming.

Also it occurred me that since the fan never used to run before perhaps now the temp sensor or heat sinks are covered with dust so you might consider using an air hose to blow out the dust from the converter.

This all is under the assumption that the fan noise bothers you. It bothers me too but not enough to make the change.

I had wfco in my keystone and anything more than 3 lites on and the fan would run. My progressive dynamics converter in the Starcraft rarely turns on the fan. My guess is one has larger heat sinks or convection cooling design that precludes the need for a fan.
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Old 09-19-2016, 07:02 AM   #18
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My tt has a wfco unit also. It like wise will turn on when a couple of lights are on. I noticed that the fan would speed up the heavier the draw. Doesn't bother me so I'll leave it alone. Your battery May not be completely charged. I recently found out that many of the new tt's now come without a dead man switch on them. So even if battery is new it has parasitic drain on it. When you plug in it will take time to recharge. ...Dusty
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Old 09-19-2016, 07:12 AM   #19
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Yes, you have been given good sound advice from several people. I'm not sure what anyone else can say to help you. Now it is your turn. Best of luck.
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Old 09-19-2016, 07:17 AM   #20
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I've had two WFCO 45's and two 55's. Both models the fan runs on DRAW, not on temp of the unit. I was a cheap guy and purchased the models that don't fit in the brown cabinet. In the little area where I mounted them I did attach a 100 degree thermal snap to the case and put a fan in the compartment to ventilate the area. I can hear THAT fan but not the internal fan. But then...I have a LOT of fans around and they make me feel like I'm protecting things so I sleep fine when they cycle. I treat my vehicles and heat producing components as if their heat needs to escape...so I'm quite anal in that area. My truck always has it's hood up when parked...noting wrong with it...I jus' want it to cool-off...like me.

I also install filters at the entrance of the WFCO unit...change it once/year. All those airborne particulates will get stuck on components inside the unit, obstruct cooling and drive me crazy. You oughtta see my refrigerator...
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Old 09-19-2016, 04:37 PM   #21
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If I do decide to upgrade, is Progressive Dynamics the way to go?
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Old 09-20-2016, 08:49 PM   #22
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Power Converter Question

I have been very happy with mine (progressive) in terms of lack of need for the fan to run and how it treats my battery.

You might find this of interest. I ran across it today-no affiliation. http://www.bestconverter.com/4135_c_226.html
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Old 09-21-2016, 05:40 AM   #23
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It's not fixable. If it puts out 13 volts it's fine. Leave it alone
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Old 09-21-2016, 08:36 PM   #24
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Call the folks at bestconverter.com they are very knowlegable and can help you thru this and either solve your problem, get you parts, or sell you a converter at a fair price that is better than what you now have. I bought my Progressive Dynamics slide in replacement from them, and the price was very reasonable and I knew I could call on them if I had problems.

Charles
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