NO HEAT! in Cab at Idle? 2021 Superduty Owners Must Know This! P2683
If you're experiencing no heat in your cab at idle in your 2021 Superduty, you need to know about P2683 and the transmission coolant bypass valve. that is what was wrong with this one. Ne bypass valve fixed it. Old one was stuck open all the time. 00:00 welcome to the channel 00:35 P2683 ford supeduty 02:40 coolant bypass removal 10:24 coolant bypass install 17:09 adding coolant to your superduty 21:33 Amsoil diesel oil 21:45 Amsoil coolant

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