My truck's heater is not working. The fan blows cold air. I don't see any leaks on the passenger side or under the truck. I assumed thermostat however I doubt that because the Engine itself remains warm after I'm driving. I had a thermostat problem before on my Sentra but when I drove, I'd see the engine getting cold again. ( Thermostat was stuck open) does anyone know what it could possibly be? Can it still be the thermostat? $aybe heater core? Or hoses? Maybe the fuse box? I don't see smoke coming from the Vents. I don't smell or feel coolant on the passenger floor. And my engine remains in operational temp. Please any other ideas? And estimated cost of fixing it. I'm in NYC 55 dollar an hour labour.
Thank you
Thank you