The temperature reading is wrong if engine feels like "normal temp", where are you getting those numbers?
If it is from an OBD2 reader then what model is it?
OBD2 would get temp reading from ECT(engine coolant temp) sensor.
There is also an ECT SENDER, not a sensor, it is connected only to dash board temp gauge.
Ford temp gauge usually has 210degF as the center line, engine would normally stay below the center line except when hauling a load or climbing a longer grade(hill)
What does heater output feel like, above 240degF would be very very HOT
Normal operating temp would be 190 to 220degF, thermostat should be a 192 or 195degF model
You usually bleed air by loosening and removing a heater hose, then refill system until coolant is coming out that hose and its connection, reseal hose.
Any other air in the system will be purged after engine warms up and thermostat opens, any remaining air will be trapped at top of rad and pushed out when cooling system pressure gets above 14psi(or whatever rad cap rating is), it will bubble up in overflow tank and be gone.
When engine cools down(turned off), coolant will be pulled back in from overflow tank to replace the space the air was taking up.
Last edited by RonD; 01-03-2016 at 04:49 PM.