just changed coolant/temp sensor on ford e 350 super duty van 5.4 to pass smog, now temp gauge hasnt moved but the overflow tank for radiator was boiling

Asked by May 25, 2017 at 07:17 PM about the 2001 Ford E-Series Cargo E-350 Super Duty

Question type: Maintenance & Repair

Need to know why is it not moving & remaining
cold on gauge but overflow reservoir been boiling

2 Answers


Check the coolant level when the engine is cool and purge all the air out of the system. Youtube for how-to videos.

2 people found this helpful.

If the coolant level is good you could have the wrong sensor, sensor could be defective, or if you put sealant on the sensor threads it won't work. The sealant insulates the sensor from ground and will prevent the electrical circuit to work. HTH. -Jim

1 people found this helpful.

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