Twilight-II-B Moisture in Valve compartment

I have a Twilight-II-B that is installed in a cold climate situation. What I am seeing is mositure is pooling to the point it is shorting out electrical components under the fireplace. The factory is saying they are not seeing this issue and have no assistance here. Does anyone think that installing some insulation in the valve cavity against the outter portion towards the outside of the fireplace would be an issue. Would this cause any issues?

you might block critical air flow if you insulate areas not designed to be insulated

you say cold climate, is it super humid outside as well?
they claim this thing is hurricane rated and weather tested

Would advise against insulating too. Been awhile since I had to deal with Heat n Glo . Are you running the pilot?

It gets a bit better when the pilot is running however there is still moisture building under the fireplace. I have been informed it is hurricane rated however 0F and gale force winds are a bit different. Dont have any issues with the wind. All of the moisture is starting on the back wall of the interior of the valve cavity. Im almost wondering if the insulation in the unit was missed? I have seen a few of these installed and they do not seem to be having the same issues.

I am wondering if there are any spots around the fireplace that insulation was missed.