replace front heater corefront and rear have independent heater cores
The front expansion valve is clogged.
Probably your thermostat
There is a divertor controller under the dash that controls between heat and cold. Sometime the wireing harness works loose.
Your heater will blow cold air only.
It doesn't really blow it out it just warms the cold air.
No
Probably because coolant level is low
you need to replace your heater core
it wont blow heat itll blow cold air
heat works in back not in front front blows hot for a few mins then cold
you are low on coolingliquid !
heater core possibly plugged and leaking