try putting anti freeze in it, you may also need a new thermostat
the water jackets are different , the motor will keep running hot
The rear defrost is electric. The heater works off the hot water in your radiator running thru it and a fan blowing the heat into your compartment.. check your thermostat, it could be that your heater core isn't getting and water to it, that is were your car get's it't heat from, if not that it could be lack of water
It will run continuously when the A/C or Defrost are on. If it is running without these being on then the thermal switch is defective.
No, hot water will just make it worse. Hot water is actually used to make ice rinks on snow or ice. Use a hair dryer or a space heater. Its a sign of other issues such as a leak or defective defrost cycle. Its important to have it taken care of quickly.
This is possible but only really if the engine is already at normal operating temperature, and if it is really THAT cold outside. The fact is, If you turn on the heat or defrost (which is also the heater) Then that outlets another heat emitting source for the engine since it uses the hot coolant to heat the heater coil thus making the air blow hot from the vents. Think of it as a second radiator, just smaller. Also this could be something that could happen if there is a problem with the thermostat sticking at high open (but usually that means the engine is running as hot as it's supposed to or hotter anyway). If this is happening in temperatures above 55 degrees Fahrenheit, a replacement of the engine thermostat is recommended.
crack a window open to let the moisture of your breathing get out and set your air control to exterior air
check the antifreeze
The heater has a little radiator in it and it may be enough to cool a engine that is running hot
The heat - is generated by the fuel/air mixture burning in the cylinders.
You can defrost them in hot water in the sink if you plan to cook them right away. If not, defrost them in the refrigerator over night.
Low coolant? Thermostat not opening?
yes, however, if the ac does not work then you will be unable to blow cold air on a hot steamy windshield to defog it.