Fan in fuse panel constantly running...

Yes..how much it runs depends on which brand and model converter/charger is installed, and the condition of your batteries

The converter, located behind the fuses, makes the DC power used to charge your batteries and supply ALL your 12v needs (lights, water pump, control power for fridge etc..) while you are plugged into shore power at the campground

Not typical.

But if the battery is really low voltage, then it could be happening.

I normally do not have the fan on my inverter/charger run at all, because I charge from the solar panels, and the shore charger does not run very often.

Do you keep the RV plugged in all the time? Or is it stored someplace where the battery can get low. If the battery is say 11.5 volts or less, then the charger will work at full capacity for a couple of hours, heat up and turn on the fan.

Also check the battery water level. If the level is really low on one of the cells, then it might be shorted, and you might have a not charged reading of say 10.2 volts. This will also cause the charger to run at 100% for a time, and turn on the fan.

If it is low on water, only add distilled water to the battery, and might as well unplug the RV to stop the battery from overheating before it is fixed.

Fred.

Mine runs all the time and the more lights I turn on the louder it gets.

Thanks guys. The TT is brand new and I've plugged it in here and there at home for the past week. Today its had the opportunity to be plugged in the longest its ever been (at least since I've had it). I just went out and unplugged it after 6-7 hours and the fan was not running. Does that mean the inverter finished charging the battery?

I've been meaning to disconnect the battery and put a trickle charge on it. Its brand new, but that doesn't mean anything.

Tacswa3 wrote:
Thanks guys. The TT is brand new and I've plugged it in here and there at home for the past week. Today its had the opportunity to be plugged in the longest its ever been (at least since I've had it). I just went out and unplugged it after 6-7 hours and the fan was not running. Does that mean the inverter finished charging the battery?

I've been meaning to disconnect the battery and put a trickle charge on it. Its brand new, but that doesn't mean anything.

When plugged into shore power the 'converter' will supply the 12V DC and charge the battery.

The fan runs to cool off converter due to heat produced....especially when charging battery
Only need to 'trickle charge battery if you are going to be unplugged for extended period.........several weeks.

Check the battery voltage and check water levels in battery.

If you have a light load on it, the fan may not even run. For example, if the batteries are charged and you only have a light or two on, you won't hear the fan kick on. But with a large load of charging or many lights, mine always cycles on to keep the converter cool.

BTW:

Converter = Converts 120VAC to 12VDC so you can run your 12 volt system and charge the batteries.

Inverter = An inverter changes 12VDC from the batteries into 120VAC so you can run 120V items such as a TV.

Tacswa3 wrote:
Thanks guys. The TT is brand new and I've plugged it in here and there at home for the past week. Today its had the opportunity to be plugged in the longest its ever been (at least since I've had it). I just went out and unplugged it after 6-7 hours and the fan was not running. Does that mean the inverter finished charging the battery?

I've been meaning to disconnect the battery and put a trickle charge on it. Its brand new, but that doesn't mean anything.

If the converter had the fan running when first powered, it was probably in "bulk" charging mode. I would guess that the battery is 90-95% charged after 6 hrs.

Disconnecting the battery and putting a trickle charger on it is some great advice you're giving yourself.

Do your self a favor and get a hand-held meter. They can be had for anywhere from $5 -> $60 with all the bells and whistles. With a meter you'll take all of the guessing out of your battery health situation. It will also be real handy for diagnosing any issues in the future.

WFCO converters fans I have heard seem to run continuously, the fan on my Progressive Dynamics only very occasionally. I think this is a sign they are malfunctioning, or installed with not enough ventilation.
I have seen discussions that many/most WFCO converters never worked correctly i.e. not going into boost or coming out of it.

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WFCO and other China made converters fans I have heard seem to run continuously, the fan on my Progressive Dynamics only very occasionally. I think this is a sign they are malfunctioning, or installed with not enough ventilation.
I have seen discussions that many/most WFCO converters never worked correctly i.e. not going into boost or coming out of it.