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Car Forum / Honda Cars / May 2008Windshield fogging
I had the leaking heater core replaced about a year ago in my '94 Honda Accord LX but the windshield started fogging up again in cold days and nights about a month ago. Not as much as it was before that heater core was replaced, but it still concerns me. Though the condensation is slick and film like, I don't see any noticeable loss of coolant under the radiator cap or the overflow reservoir. I am at a loss in figuring out what else could cause such a fogging. I hope it's not some micro leak in the heater core again after such a short time and expensive repair. I also noticed that the fogging happens almost exclusively just above the two center vent holes at the base of the windshield and hardly at all at the left and right hole. By the way, I am NOT using the recirculate position of the air flow control, so that possibility is out. Any suggestions? Thanks, RP > I had the leaking heater core replaced about a year ago in my '94 Honda > Accord LX but the windshield started fogging up again in cold days and [quoted text clipped - 12 lines] > Thanks, > RP Check to make sure the fresh-air intake part of the thing is actually working. I had some work done on a car years ago and had fogging problems. It turned out that they had not put it all back together properly, such that the door that was supposed to bring in fresh outside air was never opening. Just a thought. > Check to make sure the fresh-air intake part of the thing is actually > working. I had some work done on a car years ago and had fogging > problems. It turned out that they had not put it all back together > properly, such that the door that was supposed to bring in fresh outside > air was never opening. Just a thought. Noted, but would that explain the filmy fogging? Thanks, JR > > Check to make sure the fresh-air intake part of the thing is actually > [quoted text clipped - 7 lines] > Thanks, > JR Be sure that all the remnants of the old leak are removed from the windshield. Also, there are anti fogging agents available in your FLAPS. JT > Be sure that all the remnants of the old leak are removed from the > windshield. Also, there are anti fogging agents available in your FLAPS. I took it to a good mechanic who found the heater control valve not closing completely and letting hot coolant into the heater core even when the valve was set to closed position. I don't know how this could effect moisture getting into the air vents but it looks like the replaced control valve fixed the problem. Go and figure ... R. P. >> Be sure that all the remnants of the old leak are removed from the >> windshield. Also, there are anti fogging agents available in your FLAPS. [quoted text clipped - 6 lines] > > R. P. Two main suspects for excessive windshield fogging are: a) Remnants of anti-freeze from a leak, (previous or otherwise) b) Remnants of vinyl deterioration from heat/age Both can drive you nutz... > Two main suspects for excessive windshield fogging are: > [quoted text clipped - 3 lines] > > Both can drive you nutz... That may be so, but in my situation it did not appear to be the case. RP |
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