Re: 2002 Diamnte does not defrost, smells like antifreeze
If you are smelling antifreeze then there is going to be a leak.
Look at the drain hole for the A/C drain pan. You may not be seeing it because it is mixing with the condensation from the evaporator. Sounds like a heater core or hose connection at the heater core.
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Its normal for your windows to fog in rainy weather. If you defroster won't clear it up, then your heater core is leaking, which will just make more moisture on your windows due to the steam. Feel around the passenger side floorboard and see if its wet, and check your coolent lvl to see if its starting to get low.. odd tho, usually you will smell the sweet smell of antifreeze, but maybe its just starting to leak and its not really pouring out YET.. Warning, as time goes by, leak will get worse.
If it was me, the first thing I'd do is go check my fluid level in my radiator. I'd add fresh anti-freeze, if I hadn't done so in a year or more. Your defrosters won't work properly if you are too low on fluids in your radiator, OR your thermostat is malfunctioning. Replacing your thermostat might be a good job for a mechanic. Good luck.
you could also be developing a heater core leak. if you start seeing fluid on the carpet or windows fog on the inside when defrosters are on, you got trouble. better to fix the problem now then in the middle of winter.
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 !
You have a coolant leak most likely in the heater core. Try disconnecting your heater hoses and coupling them together, then running the engine to see if the leak goes away. If it does, I would have the heater core replaced.