Hold on there, Dwight! 
Does the assembly drawing call out to epoxy fill those holes? Have you considered the implications of what could go wrong if someone were to follow your advice?
1. Loss of thermal conductivity/change in thermal performance. It could be that the unfilled holes are required to transfer heat to the thermistor on the opposite side of the CCA, so the thermistor can sense the heat and the circuit can react accordingly. What happens if you fill those holes? You insulate the back (sensor portion) of the thermistor.
2. A change in dielectric characheristics could occur. We have no idea how this circuit is used.
3. If the wrong epoxy is used, it may get hot and even possibly ignite.  Total catastrophic failure (automotive fire) could follow.

Be careful what you say, the first rule is Do No Harm.

Charlie, 
Discuss this with the customer's design engineer or contract manager. They may wish to know about issues such as flux entrapment driving up their costs, or convey certain cleanliness or hole-fill requirements. Have you checked the assembly drawing for the CCA?


________________________________________
From: TechNet [[log in to unmask]] On Behalf Of Dwight Mattix [[log in to unmask]]
Sent: Tuesday, March 13, 2012 4:56 PM
To: [log in to unmask]
Subject: Re: [TN] Purpose of these plated vias?

thermal via farm

100% fill those vias with non-conductive epoxy will fix what ails you
in this case


At 12:42 PM 3/13/2012, Charlie Pitarys wrote:
>I have these PCB's (mixed technology) in house, used for an automotive under
>hood application. In several spots on the board are these array of holes. On
>the A-side a smt component like a thyristor will cover up the array.
>What are these there for?
>The wave flux residue is proving tenacious to effectively clean out of every
>via. Especially with the old school cleaning tool at this account.
>
>Some of the vias are clear but some have solder filling or partially filling
>them. These are now also filled with wave flux.
>Below is a link to a picture of the array.
>http://i123.photobucket.com/albums/o319/dartfrogmts/Kyzen/A-Side00140xFCR145
>F20min-1.jpg
>
>I'll get them clean but curious as to why these are on the board.
>Thanks in advance
>
>Charlie
>
>
>
>
>CONFIDENTIAL
>The content of this message, including any attachments, may contain
>privileged and/or confidential information proprietary to Kyzen and is
>intended only for the named addressees. If you are not the intended
>recipient, you may not disseminate, distribute or copy this email. Please
>notify the sender immediately by email if you have received this email in
>error and delete this email from your system.
>
>
>
>______________________________________________________________________
>This email has been scanned by the Symantec Email Security.cloud service.
>For more information please contact helpdesk at x2960 or [log in to unmask]
>______________________________________________________________________


______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________

______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________