Bad 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.
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∙ 10y agoWhat 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?
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.
Low coolant and a clogged heater core are possibilities.
faulty control valve on heater or air in the lines
Maybe its broken. Or maybe you pressed the AIR CONDITIONING
You may need to replace your Thermostat or your Heater Core.
Most likely your pilot light is out
because u pooped in it
One of the reasons a 2000 Jeep Cherokee heater would randomly blow cold air and then hot air and then cold might be that there is a problem with the hot/cold duct. The air or a vent might be inadvertently blowing periodically.
did you check the heater core because my truck did that and that was what was wrong
If you are saying the heater is blowing out cold air you need to change the heater core which is located inside the dash
You need to change your thermostat in the car.