The Heater core is Either clogged or has gone out. If so you will notice either a leak of antifreeze or you will smell it when you turn your heater on, and your clutch needs to either be adjusted or replaced depending on how long the part has been on your car
What do you mean by "has no heat"? No air blowing out, blowing out cold air when heater is on, blowing nothing at all? Heater not turning on? What specifically is happening?
No one knows if:The heater is NOT blowing - or blowing on high speed only, or... The heater IS blowing, but the air is NOT hotEither way, the "Related Questions" below will get you started
No, the inside temp is controlled by a temp door inside the heater box.
If your heater is a heat pump , then yes.
Low coolant and a clogged heater core are possibilities.
faulty control valve on heater or air in the lines
If you feel no air blowing at all (when you are not moving) then your fan is not blowing. If it is blowing air, and it is cold, when the heater is on, then most probably your heater core is leaking, or is clogged. These are easily replaceable and go bad all the time in older cars.
Motor hasseized.
You may need to replace your Thermostat or your Heater Core.
Could be a bad thermostat or heater core
yes if it stuck open.
One reason your home electric heater is blowing cold air is the heating elements are burned out. A bad thermostat may also be the problem.