Low coolant in the system. Defective heater control valve. Clogged heater core.
The heater valve could be failing to open for one reason or another.
get a new heater switch
Leak in heater core. Replace core.
The front expansion valve is clogged.
OK, did the blower motor actually just stop, or does it still blow but no heat?
heater core possibly plugged and leaking
underneath the dashboard on the passenger side.
check your coolant level
heater will not blow on a 1996 ford contour
if the heater does not blow out warm air change the setting.
It doesn't really blow it out it just warms the cold air.
Poor coolant circulation from a plugged up heater core. Try flushing the heater core and replacing the thermostat.
The heater does not blow air because it emits infrared rays that have heat molecules within them, thus releasing heat, not blowing it. A heater does not blow air becasue there is no moving air source within the heater. The heater emits infrered rays that cause heat to slowly flow out of the heater.
it has a partially clogged heater core.replace the heater core
Could be a bad thermostat.
The resitors or contacts to the resistors have quit. Start at the switch, check continuity/resistance on the input and output for each speed.
either need a blend door accuator or a heater box
Your heater will blow cold air only.
Your electric unit can blow fuses during the winter when you are running your heater for several reasons. The main reason would be that you have a faulty ground on your heater.
You need to replace the heater coil !
Low coolant? Bad thermostat? Heater core plugged, restricted or airbound? Bad heater control? Water pump not circulating coolant?
A restricted/plugged heater core can do that. Try flushing the heater core.
Possible causes are, low on coolant, thermostat stuck open, clogged heater core or vacuum scorce not getting to the heater control.