Quote Originally Posted by vwdmc16 View Post
Get some cardboard and block off half the radiator Inlet, unless it's a super hot day you should still have plenty of air to keep it cool on the freeway. Just for a quick test they should at least be able to make you confirm or deny air flow is the issue. Another ways you could tape off the back of one fan with masking tape and then go on your freeway test drive. If the warning only blinks once then you know you are confirming your theory.
I did run a fan current test a long time ago on an OEM fan. Blocking air to the fan increased the current which is why I thought air blowing on the fan would decrease it. But after thinking about it more, the fan speed may just be increasing and still drawing the same power. Another test I can do with and OEM fan is to power it up and use my compressor blow gun to see if the currents change. I have two OEM fans, one is still in the stock shroud bolted to the stock radiator. I used those fans when bench testing my fan fail design.