Might not be the cluster but a connection to the cluster. Only one coolant temp sensor in that system I believe.

I started a thread on the ford site, so far not much feedback, so Im thinking my issue is not a common one

We had three new f550’s with 6.0’s at the farm in FL back around 2003.
We kept them for 3 years. The last two years we never had all three out of the dealer’s shop at one time. Switched to gmc Duramax’s and liked the engine but the chassis’s didn’t tolerate the farm stuff very well. Back in F 350 6.7’s and really like them. They pull like tow trucks.

Update, next Wednesday 26th taking it in, changing all the coolant, temp sensor and T-stat.........gotta start somewhere,

If going to a dealership, test drive a new 6.7L while your there. I loved my 6.0L most days, but this newer 6.7 truck with more miles on it than my 6.0 has me all smiles every time I roll into it. Of course I couldn't leave it stock, so only time will tell.

Im looking for a nice low mile 2017, dealership wont be touching my truck.....

Update, drained and refilled coolant, changed tenp sensor and thermostat, haven't towed the boat yet, driving yesterday 85* day for about 30 min I noticed my EOT was creeping up to around 234* does this seem high without a load ? Ive searched normal temp range and have not found anything, coolant temp was 189 190

Those are referred to as 'Your ****ed lights."

The Ford forum is saying temps are to high, try back flushing the coolant system and if that doesn't work replace the oil cooler, which is a PITA

I would bet that if you gave Bulletproof Diesel a call, they could help you out. They are pretty sharp on the 6.0's. I used to buy a ton of parts from them when I was fixing the blown head gaskets on these trucks and flipping them.