heater problem..... cold like heck...

[mrnickleye]

the heater core is inside, behind the glove box. so if it were to leak, you would have coolant on the passenger floor. you must have a leak at engine or hose under the hood to get the smoke.

the air should come out each area you place it in. ie: defrost, floor, vents. hot or cold won't matter. the temp is controlled by the temp up/down control.

it sends none, or more & more air thru the heater core as the temp setting is raised.

if air comes out good in high fan when temp is on cold (like 65*), but not when setting is on 85*, then there is some thing blocking the air flow thru the heater core. dirt/lint?