2004 3.0 ac delay

[Marine6531]

Hey gents!
I know there are a lot of threads on here about ac but I have read through nearly all of them and the ones that actually sound like my problem never come to a conclusion. So basically Im writing this to see if anyone can help me out becuase this ac issue is frustrating me!

Okay, so the ac doesn't begin to blow cold for about 15 mins after the vehicle starts. I looked first to the aux fan as most posts here point you in that direction. I noticed the aux fan does not spin when turning on ac, even when hitting the MAX button. the compressor however comes on as soon as ac is pushed. About 15 mins later however, the aux fan starts to spin and ac is cold. I checked V at fan and found a steady 14v, DME wire was around 40MV or so. So voltage is getting to the fan at all times. Also if I unplug the pressure switch the aux fan kicks on immediately and is on like super speed! So it seems like both fan speeds work (hi/low). But what else tells the fan to kick on or would cause the fan to not come on until the car is hot. Ohh, I forgot to mention that as soon as it works, you can turn the car off and on and it will still work. Once the cars sits for about 3-4 hours the ac delay starts all over again. I know there is a coolant temp switch, should I try shorting that out and see of it kicks the fan on? Is there any switches/sensors I can try? Relays?

Also, does this years model have a hi/low fan switch outside of the aux fan itself. I was told that the switch that interpretd the DME was actually built into the fan and if it went bad you had to replace the whole fan? But I have also read something about there being a mode switch near the expansion tank, which one is it?

If I have left any important info out please let me know. I will be monitoring this post closely as I am extremely desperate for a solution. Thanks in advance for any/all help!