can you please clarify what you mean, do you mean that the front heater blows cold but the rear blows hot or do you mean that when the heating is on cold it blows hot? many thanks paul
we changed radaitor & thermastate , now heater blows cold air
Your average A/C unit blows heat through all vents.
it could be the heater core and ac housing unit that allows hot air to be mixed with the cold air or it could just cancel out the cold due to the motion of the car
Blowing out moisture is a sign that the heater core is leaking. Starting out hot and turning cold could be low on coolant.
You are in the beginning throws of blend door failure. Check www.heatertreater.net for more information on diagnosing and fixing the problem.
Low coolant, failed thermostat, partially plugged heater core...............
This frequently happens when the heater coil is going bad.
Poor circulation from a restricted/plugged heater core. Try flushing it.
Get the air out of your heater core.
heater hoses might have been disconected
It has a bad "Blower Motor Resistor" The fan switch itself is fine.