Need help with 850 overheating

2013 850 Touring. Bought bike used and did mods (Lift, Tires, snorkels, RAD RELOCATE). I have run the bike 30 mins to an hour 4 or 5 times. Went on ride last week, ran for about 30 mins, then it went gets hot goes into limp mode. Fan cycles 4 or 5 times before not working. So, parked and brought back. I replaced the ECT Sensor (thermistor) and the circuit breaker today. Ran it for 15 mins to get cycle again, but the fan never came on this time. Any ideals?
My radiator is clean, it gets hot because fan doesn’t come on. I unplug ECT Sensor with bike running anf fan kicks on. I have burned the system several times and raised front end 2’ to allow air to escape. I have swapped relays and know they’re good. I am thrown off because systems functions as it should for several cycles, then stops. Both hoses get hot. When it gets really hot it blows coolant back into overflow. If the thermostat itself was stuck, the fan would kick on, it just wouldn’t cool engine. What’s left to check? I did search the forum but none of the threads got past dirty radiator or thermistor. I appreciate your time in advance. Thx!

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