You need to change your thermostat in the car.
The heater core is leaking coolant.
Heater blower motor is defective and locked up, or possible short in the wiring.
it is your heater core most likey
Low on coolant. Bad thermostat. plugged heater core. Temp blend door malfunction.
AnswerBad thermostat, clogged heater core, or a defective heater control switch. If an engine has not been running long it will not have warmed up, the warmth from a car heater usually comes from the engine.
Depends. You might be low on coolant. Or your heater core could be clogged. Neither of those instances is particularly "safe". But, it could just be a blend door, which wouldn't matter.
You might need a new thermostat or heater core.
Low on coolant. Stuck open thermostat. Plugged heater core. Temp blend door inop.
Have you checked your thermostat?
needs heater core replaced wost likely be hind the glove box
Check for a thermostat that is stuck open. Also can be a clogged heater core, or defective heater temperture control valve.