Recently had the heater core replaced under warranty on my 2020 Ford F350 7.3L due to it being plugged.
Going into this recent cold snap I had barely any warm air blowing from the vents, I assumed blend door actuator but after they all checked out the only thing that made sense was a plugged heater core, I checked the inlet vs outlet temp of the heater core, had 17 deg C diff. Its under warranty so I sent it to the dealer. The tech came to the same conclusion and replaced the heater core.
Unfortunately I have no idea it it was plugged with casting sand or what.
Truck was put into service in June of 2021 and has 108,000km (67,500 miles) / 3800 hours.
I did a coolant flush with the Ford product in May at 86,000km (53,750 miles) and filled with the Ford OEM coolant.
I was surprised to see a plugged core given the age? After some research I found quite a few examples of low mileage Fords with plugged cores.
Not sure where to go from here, I don't think that drained the entire system, probably just enough to get the core out. Perhaps another flush this spring/summer.
Maybe I should add back flushing the heater core to my list of preventive maintenance?
Going into this recent cold snap I had barely any warm air blowing from the vents, I assumed blend door actuator but after they all checked out the only thing that made sense was a plugged heater core, I checked the inlet vs outlet temp of the heater core, had 17 deg C diff. Its under warranty so I sent it to the dealer. The tech came to the same conclusion and replaced the heater core.
Unfortunately I have no idea it it was plugged with casting sand or what.
Truck was put into service in June of 2021 and has 108,000km (67,500 miles) / 3800 hours.
I did a coolant flush with the Ford product in May at 86,000km (53,750 miles) and filled with the Ford OEM coolant.
I was surprised to see a plugged core given the age? After some research I found quite a few examples of low mileage Fords with plugged cores.
Not sure where to go from here, I don't think that drained the entire system, probably just enough to get the core out. Perhaps another flush this spring/summer.
Maybe I should add back flushing the heater core to my list of preventive maintenance?