Heat isn't working????
So fan doesn't work?
Fan works but air is not as hot as before?
Fan works but Air is freezing cold?
Have you opened the radiator cap before starting cold engine?
Was it full to the top, it should be.
There is a Overflow tank for the radiator, is it filled to the COLD line, when engine is cold?
Leave hood open put rad cap back on
Feel upper radiator hose by radiator
Let engine idle for 3 minutes
feel upper hose again, is it getting warmer?
If it is that is wrong, radiator is for "extra heat", there a device called a thermostat that blocks flow to the radiator until coolant in the engine gets up to 190degrees.
If upper hose is warming up then thermostat is stuck open, so engine can never heat up on a cold day.
Ford temp gauge has 210deg as the center, after 8 to 10 minutes of driving the temp on gauge should be above 1/4 and below 1/2.
Thermostat replacement isn't hard and the part isn't expensive, use 192deg thermostat, NOT 160 or 180deg