Fan on all the time

[lmc122]

Just put my truck back together a 2006 f-350 srw 6.0l, installed a egr delete, oil cooler, and coolant filter. On first start the check engin light came on and the fan was running all the time, roaring going down the road. Had the light checked and the oil temp sensor was bad. Have not replaced it yet but will that sensor being bad cause the fan to stay on? I never heard the fan before.

[dannyboy950]

EOT is one of the primary sensors that tells the pcm to turn on the fan.
For example a EOT of 250* the pcm turns the fan on in full lock up and will keep it there until the sensor tells it the temp has dropped to a safe level, but if it doesn't send the signal that the temp has dropped [still reports a 250* temp] it will keep the fan on.

[lmc122]

Is the ECT and EOT the same sensor? they look identical and have the same plug. Napa can get a ECT sensor but are not showing a EOT sensor. on line I noticed some part numbers for the ect and eot are the same.

[dannyboy950]

If they are the same number then they are the same sensor. To be honest I have never really paid attention to it. Never noticed that before.