Could be a clogged heater core, stuck thermostat, sensor or relay ( if ur car has electronics). Radiator may need flushing . Worse case, combination of noted possibilities. Good Luck. Inspector F.H.
If it's cold outside do you want cold air blasting when you get in your car?
You are low on coolant to the heater core.
Coming out of the vents around 43 degrees
because you need to keep warm when it is winter and other times when it it cold
A.C. circulates air(just like a fan) and turns it cool.
Simple, you ac does not blow cold air even though you have it turned on and the temperature set to cold.
It doesn't really blow it out it just warms the cold air.
If it does blow just not cold air you should see if it needs to be recharged
An air conditioner blows out heat
The heating system doesn't get heat until the car warms up and the thermostat opens.
Sounds like your compressor is locking up.
if car is blowing cold air, you need to check the thermostat,the heater core, and the heat control. the coolant will not blow cold air unless there is no coolant at all in engine,then you have bigger problem anyway