Engine temp indicator shows running at proper temp, but radiator cool to the touch. And no heat from heater.
When first noticed problem, I discovered radiator low on anti freeze, it was below top of core, Added maybe 1/4 gallon, then it was full. And then I filled reservore.
Ran for 20 + minutes, temp of radiator felt warm at best and cap still cool ,
When cap removed antifreeze is cold, heater not putting out much heat,
Heater finally started putting out a little heat. (warm not hot air).