b20forlife

ok I have a 2000 civic us. now the heater did get hot last winter but this winter it blows cold and a little warm once the car has been running for a while. so I read a little and my car does not smell like colant. I changed the thermostat and nothing. I also check the little valve to make sure it was opening and closing and it works fine. what can it be please help its going to start snowing soon.

Solster

chreck the cabin filter to see if it's pluged and also touch the two hoses that go to the
heater core after the motor warms up and see if one is hot and the other is cold (with the heater set to max heat and fan speed)

if both hoses are cool then the heater core is Pluged and will need a flush and maybe replaced.

delsolo95

^^ this

fv8s

Bleed your cooling system with the car on an angle with the heat on HIGH.