On cooler nights I've been noticing excessive condensation on the front window of my '94 Accord, especially on the passenger side and can't figure out what causes it. First I thought perhaps a leaking heater core but there is no loss of coolant that I could observe and the core was replaced recently. What else could cause it? This is only dry summer now and I dread to think how much worse it gets late fall, especially on rainy days.

 

My CB7 does the same thing....It's nothing to worry about....it's a sign you've got DAMN cold A/C.

Hoping it's a/c related...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Grandhustleman86 &raquo;</TD></TR><TR><TD CLASS="quote">My CB7 does the same thing....It's nothing to worry about....it's a sign you've got DAMN cold A/C.

Hoping it's a/c related... </TD></TR></TABLE>

Even if I have not used the A/C for a long time before this fogging?

 

If it is fogging on the outside, and the whipers can remove it, then yes, you have a dam cold A/C.
If it is fogging on the inside, then this seems to be pretty normal. Turing on the A/C will remove it. Mine fogs all the time when its cold outside. I use the A/C to clean it off. I want to try the Rain-X Anti-Fog. I am not sure if it works.

 

It's fogging on the inside and it became quite noticeable only recently. It is also more pronounced on the passenger side. Yes, turning on the A/C with heat on will take care of it but that used to be necessary only on rainy days before. There was definitely some change in this condition recently and I can't figure out what to look for.

 

I think the A/C dehumidifies the air, and that is why it works to remove fog on the inside. Is your air circulator set to take in air from the outside? This is how it should be. I also notice that mine fogs up more from just the fan if I leave it on the windows setting.

 

I always use outside air except when I turn the A/C to keep the interior cool. Well, I'll see how bad it gets when the fall rains come.