Windows steaming up in the inside.

Either a hose isn't tight or has a crack in it. You could also have a defective heater core.

Most heater cores are located behind the dashboard. This can be a difficult job putting it back together. Be sure it really is the heater core. ie water on the floor boards,the smell of antifreeze inside the cabin.Steamed windows all indicate the heater core.

Be careful with that Barsleak. Don't be surprised if you see seals and or your radiator blown out. Not only will it plug the leak but it can also plug things that you do not want plugged, such as hoses and seals

It will be the heater core. If you can smell it inside the car and it's steaming up the windows the core will need to be replaced. Remove the heater core housing and check to make sure its leaking from the core itself. You might get lucky and have a leak from the hoses running to core instead. Hope that helped.

got to replace heater core first try a cheap method buy some aluminum seal or bars leak put in radiator might fix problem for a short while need to replace heater core or possible hose leaking.

Hi, if it is steaming up the inside of your windows, you have a water leak in your heater core. It is located on the passenger side enclosed. Check you water level also. You can try adding some engine stop leak, a good brand is Bar's leak that will seal any small leak which is what you probably have. Make sure you are running a 50?50 mixture of antifreeze. Good Luck, and please let me know.
Shastalaker7

I have very little heat in my '97 Dakota, but I did last year too. I haven't backwashed my heater core this year, which worked great last year and got me through the entire winter season. If you haven't done that to see if it will help, I would defenitely do it. It takes like 15 minutes total time to do it. This is far easier than pulling the dash out and replacing the heater core. Hope that would help, if not sorry. Changing the heater core is one problem I don't even want to ask my mechanic to tackle and he is a very great friend of mine.

U HAVE A LEAKING HEATER CORE.

This could be caused by a leak in your heater core,,do you notice the steaming up more on the passenger side,,then it will most likely be the heater core which is leaking coolant into the car.

Steam coming through the air vents indicates a leak in heater core. The heater core is like a small radiator that is used to heat the inside of your car in the winter time. The blower, blows air through the heater core and into the inside of the vehicle. The steam you are seeing is the hot coolant leaking from the core.

- Jim