[koates]

King Seeley electric temp gauges as fitted to early flathead Fords with two engine sender units (one is just a switch two terminals & the other single terminal is the sender) work like this. With ignition switch OFF the temp gauge pointer reads to the right side of the dial which is HOT or 212 deg. F. With a cold engine and ignition switch turned ON the gauge pointer will go to far left or cold. As engine warms up pointer will move to the right to read the coolant temperature as it warms up. This is noted in workshop manuals for Fords through the late 30s to the 50s. If the F1 in question has some other type of gauge then it may be different. Regards, Kevin.