I have no heat when I start to drive. I have a 98 Camry 4 cylinder and in idle the heat works fine and the engine thermometer reads in the middle. When I start to drive after about 100 ft the thermometer is at cold and in the winter nothing but cold air blows. My friend made sure the coolant was circulating and I checked all the fuses marked HTR except the big 1"x1" one. I know that one is expensive. Anybody have any ideas what the problem might be?
Check to make sure the thermostat isn’t stuck partially or fully open.
Tester