Run a new ignition switch controlled "hot" wire directly to fan motor
The heater core could be burnt out. Make sure your antifreeze is full and your switches on the dash are working. When you move the switch from cool to warm you should be able to hear a difference. If you don't the door/flap may not be moving.
No! Thermostat.
Not knowing what year, make and model you have, I would suspect the heater fan switch and or electrical plug to the switch is at fault.
You have to wire the C4 to a switch.
There are hoses in the engine compartment that go to the heater core. You can remove the intake and out going hoses from the heater core. You have to either block off these hoses or connect them together, depending on the make of the vehicle.
To effectively use a blow heater to keep warm during the winter months, place the heater in a central location in the room, keep the doors and windows closed to retain heat, and set the heater to a comfortable temperature. Make sure to follow all safety instructions and never leave the heater unattended.
the blown head gasket would make it over heat. but it wouldn't cause the heater to blow cold, it should actually blow hot if that is wat happened
if youre trying to turn the heater on and cold air comes out, then its most likely the heater core
Put in a winter thermostat
To turn on a heater, locate the power switch or dial on the unit and set it to the desired temperature. Then, wait for the heater to start producing heat. Make sure the area around the heater is clear and well-ventilated for safety.
To turn on a wall heater, locate the power switch or dial on the unit and set it to the desired temperature. Wait a few moments for the heater to start producing heat. Make sure the area around the heater is clear and not obstructed.
To turn on a wall heater, locate the power switch or dial on the unit and set it to the desired temperature. Wait a few minutes for the heater to warm up and start producing heat. Make sure the area around the heater is clear and safe.