tow truck THIKS its overheating

Suggest posting on the Ford F150 forum

As for the dealer unable to find the issue, try another dealer or ASE Master Mechanic specializing in thermal management.

For your dash gauge to go into the red zone and go into limp mode, there has to be a code set. A simple code reader should find that code.

If no code set, then there will be too many things that might be taking the thermal system down. Personally dislike overly complex vehicles and their level of diagnostics (today).

Lastly, what was the last time you had the HOATs coolant flushed ? and...have you been opening the closed coolant system? That allows air & the main culprit is oxygen being allowed into the HOATs mix, which is very bad and will cause acid laden globules to form and stick to cooling areas (radiator tubes) to both plug and rot it out from the inside

flathead92 wrote:
well Ford cant find anything wrong. they even called factory. Cant belive this is the 1st f-150 that has this issue. we even pulled a heaver camper before down sizing. Censers would go out and stay out, this only happens under load. went from San diego to Phx red line. I say tow mode mother board isssues

I still can’t figure out whether you’re talking coolant temp or rpms?
But to play detective, I don’t see a summer drive pulling a camper across the desert at coolant redline so

I'm not sure where the temperature sensor is on these engines, but it might be worth a shot to measure the temperature at or near the engine temp sensor or on the thermostat housing using a inferred temperature meter that you simply point the LED light on the location you want to measure temperature and compare its measurement to the trucks reading.

well Ford cant find anything wrong. they even called factory. Cant belive this is the 1st f-150 that has this issue. we even pulled a heaver camper before down sizing. Censers would go out and stay out, this only happens under load. went from San diego to Phx red line. I say tow mode mother board isssues

Are you using premium fuel? If you have the Eco-Boost engine there numerous complaints about over-heating in the earlier models. Do a Google search and you will see the problems and hopefully a solution.

pitch wrote:
What have you done to diagnose the problem?
You threw out a generic open ended question,with no context.
Electrons are cheap, there is no character count so please restate your question with specific symptoms and attempted remedies. Right now you have posters throwing **** on the wall to see what sticks.

Yeah but pretty typical of this forum.

What is it that's red lining? The tachometer or the temp gauge? Which engine?

We the people don’t actually believe a modern pickup truck would “struggle” with cooling while tow hauling within oem recommendations and ratings if everything is in good mechanical order do we?

Temperature measurements need to taken at the rad tank, thermostat housing and plug your code reader into the OBD system and see if the readings agree.

Then you know what to chase.

Fwiw, there may be some weird condition present, but If everything is right under normal driving and hot under load, it’s likely mechanical or physical and it is overheating.
But the lack of info presented and the fact that the OP refers to his truck like a person, says go to a repair shop to me.

This thread will go nowhere…. It will overheat! Lol