[RE-wrenches] Battery Sensor Light on VFX3648

[Jerry Shafer]

Wrenches, Jay,
Transformer temp sensors in the FX Fails, fans fail causing fet boards to
overheat, dirty filters cause high temps on all the intervals. When outback
was still running the parts department you always got temp senders with
fans, boards and a relocation procedure, yes you must put the sensor in a
new location.
FunTimes

On Thu, Jan 8, 2026, 3:26 PM Jay via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> I’ve replaced dozens of internal temp sensors over the years.
>
> I learned to also replace the fan at the same time.
>
> Or vice versa.
>
> Jay
>
> On Jan 8, 2026, at 4:01 PM, Luke Christy via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> Drake,
> I agree with Ray,
> The message you’re seeing does not refer to the RTS that has been absent
> for years- it’s an issue with an internal sensor.
> I have seen intermittent warnings relating to internal sensors on VFX
> units that have self-resolved with a reboot, but if the warning is
> persistent then you’ll likely need to open the unit up and replace the
> sensor.
>
> Luke Christy
> Renewable energy consultant
>
> NABCEP Certified PV Installation Professional™:
>
> Solar Gain Services, LLC
> PO Box 531
> Monte Vista, CO 81144
> 719.588.3044
> sgsrenewables at gmail.com
>
> On Jan 8, 2026, at 3:00 PM, Drake Chamberlin via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> A couple of years back, a client changed from lead acid batteries to
> LiFeBlue, lithium batteries. At that time the temperature sensor was
> removed.
>
> The other day, a warning light started blinking. The warning turned out to
> be a bad temperature sensor. It is strange that this message showed up now,
> as the sensor has been gone for years.
>
> Is there any way to turn off the warning light?
>
> Thank you,
>
> Drake
>
>
> *Drake Chamberlin*
>
> *Athens Electric LLC*
>
> *Ohio Electrical Contractor’s License 44810*
>
> *NABCEP Certified PV Installation Professional*
>
>
> --
>
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