I haven't tried this, but it seems that it might work.

The basic idea is to cause the leak to show itself. That means that there needs to be an indicator of some sort that flows out of the leak. Air is colorless, so it won't show. And if the leak is high, a heavy indicator such as water will never reach the leak. But suppose you introduce some "smoke" such as is sometimes used to find pressurization leaks into the seal. You might need to plumb a small reservoir between the pump and the seal to get enough, but if there's a leak, "smoke" would come out. You'd get a fast visual indication.

Ted Noel

Thanks to all those who responded on the door seal and fan.  Lots of good information and ideas to work from. 

 

It appears that we do have some sort of slow leak and now the challenge is finding it, but we now have some good methods to hopefully track it down quickly.  I will report back what we find. 

 

We also received a lead on a potentially much quieter fan motor which we will look at.

 

Regards,

 

Denis

N750PJ

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