When i run the heat or air cond. i smell water and windshield fogs up in the middle.
Have started smelling water(as in when it is warm) when I am driving my 99 jgc and replaced my upper and lower radiator hoses, but still smell it. I have no water on the floor inside and haven't noticed any under the vehicle when it is parked. Also, the heater on the passenger side doesn't put out heat, only COLD air. Sometimes the windshield fogs up inside in the center down by the dash.
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Re: when i run the heat or air cond. i smell water and...
Sounds like your heater core is bad. Have someone check out the heating system and possibly replace heater core.. that should take care of the fog problem also by enabling you to use the defrost... Good Luck!
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It is normal for the A/C compressor to come on during defrost mode. This is done to prevent provide dry air to the windshield to prevent fogging when the defroster is turned on. The blend door is designed to allow heat to the windshield, but also some of the cool air from the evaporator to prevent fogging.
This may be due to a bad heater core or dirty core with a plugged water drain, first see if the a/c works. turn it on and see if the air gets cold and if the ac compressor works.
The way the defrost works to keep windows from fogging up is that when the front defroster is tuned on the ac should also be on, on most cars when you go to defrost it will turn ac on automatic. the system then uses hot and cold air to remove the moisture in the air to avoid window fogging. if your a/c is not working then that may cause window to fog, but if you are also getting a smell then the drain that lets out condensation may be plugged and then water builds up and also mold from always being wet and when heat is on you smell that.
i want you to run the defrost and when windows fog up wipe window with hand and see if it is greasy . if it feels oily then you may have a bad heater core, the core leaks coolant out and steam and causing windows to fog up with a flim of grease.
no heat is probably low coolant or bad thermostat,although you have fog and smell ! the heating and cooling systems are closed systems the only way the windows fog is the coolant is hot and steams inside the car due to some leak inside the heater core box. as well as the smell being present. Now it is possible that a little leak has occured where the coolant supply or return line connects to the heater core and is running into the car which is running onto the core and creating steam and smell. hopefully it is a easy clamp tighten fix for you.
Step 1: check to see if there is any leakage of coolant under the car, if so it could be a leaking hose or water pump seal.
Step 2: check to see if there's coolant leaking on the passenger side fire wall (inside the car) and to see if there is any fogging on the windshield when the defroster is running, or if there's smearing on the windshield, this would indicate the heater core is leaking and has gone bad.
Three possibilities--the windshield is leaking water, the heater core is leaking antifreeze (should smell like antifreeze), or the air conditioner evaporator (near the heater core) has a plugged drain tube and the water condensed out of the warm air is running back into the cab. Hope this helps!
Sounds like a possible heater core failure(hole in it) the smell indicates to me the coolant(anti-freeze) is leaking into the passenger compartment. Check the carpet in front of the front passenger seat for moisture, this would confirm heater core leak. Good luck !
If your smelling coolant in cab, and window fogging up, check fog if green heater core is going. Over heating could be a couple of things, plugged radiator, water pump, thermostat. To check for water pump Find the top hose, run car check for leaks on ground. While warm or hot wear glove oven mitt or something that you can feel through but will protect from heat, If you feel flow of coolant more the just a trickle its a good thing to replace thermostat. Also check for bubbles in the coolant tank, if there are bubbles your S.O.L. the head gasket is blown