I spent a cold winter driving to work. I get a small amount of air and heat that keeps the windshield from frosting. But, I have a blanket over me and gloves on and still freeze. I replaced the heatercore, heater hose, radiator x2, thermostat! What is left? (I know a new vehicle!) Thank you.
Could be the heater control valve (controls the amount of water coming to heater core ) and or the blend door not opening or closing fully.
HTH, Rick
you should also be certain that your cooling system has been properly bled. trapped air can cause a "lock-up" condition to occur in the heater core. this can easily be fixed by loosening one of the heater hoses connecting to the heater core just enough to let it leak a little. this should be performed by an experienced tech. to avoid possible injury from hot coolant temps. and pressure.
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