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The car was driving fine when suddenly the wind screen started fogging up. The air con was ON auto and temp set at about 22 Degs on defrost at the time. So I increased the fan speed to remove the fog. Same time I was constantly watching the instrument panel for any warnings or abnormal condition. After a few mins the temp gauge went right down to C and some click clack sound was coming from behind the aircon unit. And then in a couple of mins time the temp gauge hit H and I pulled over & stopped the car.

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This is speculation, but the fogged windshield, the noise behind the dash, and the temperature gauge actions lead me to the heater core. When they develop any leak they fog the windshield, and enough fluid loss or an air pocket could explain the temp gauge readings.

Posted on Oct 16, 2013

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Posted on Jan 02, 2017

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SOURCE: I'll start my van (sometimes

Here is a fix...I had the same problem with the instrument cluster going dead intermittently. Pound your fist on the dash and wahlah, everything worked again. It would also register an engine code of 'invalid or incorrect information or lost data', something like that. What I found was a hairline crack in a solder connection on the cluster circuit board right at the harness plug connector. Mine happened to be the ground pin for the cluster. And what do I mean by 'hairline' crack? It takes a trained eye to find cracks in solder connections. Most people don't see them, because it is a circular microscopic crack surrounding the pin where it solders to the board. It it usually caused from heating and cooling, vibrations, and other element that attack and deteriorate solder. Very intermittent, and very hard to find. So instead, just simply resolder each of the connections to be sure another one won't fail in the near future.

Posted on Oct 13, 2008

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SOURCE: no low beam, headlight on warning sounds w/lights on auto with key out

Had the same problem on a 2003 vibe- finally dianosed as a fried headlamp module then needing to trace back and find a short in the electrical that blew headlamp module . Module $ 170. Labor to replace module 2hrs. Labor to trace short 4 hrs??? Dealer charged me $900- .
If anyone has info on how much time it should have taken. I would appreciate the feedback

Posted on Nov 01, 2008

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SOURCE: Heater works but defrost fills inside with fog.

your heater core has probably sprung a leak.does the fog smell kinda sweet?....check the floor in the front where the floor mats are for moisture or even puddles of antifreeze.(the replacement of a heater core can be very expensive as the entire dash usually needs to be removed to access the heater core)also look under the engine near the firewall for antifreeze drips.

Posted on Dec 13, 2008

wyatt1582
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SOURCE: air conditioner failing

You need to refill the A/C. It works on pressure in the system if its below operating pressure it will not work at all. Buy a refill kit and follow instruction.

Posted on May 14, 2009

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SOURCE: 1998 Ford Escort dashboard warning lights and gauges not working.

Sounds like possibly the ignition switch is going out. Try jiggling the key in the ignition in the on position and see if your lights come back on.

Posted on Feb 18, 2010

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2006 Barina manual. Driving, suddenly clutch doesn't engage on take off. Waited and then it grated and worked. Temp of car suddenly rises, air con then blows hot air. Stop, engine super hot


The only scenario that i can think of that could create all of your issues is your clutch is and has been slipping for some time. All other train of thoughts really don't make sence. This would give issue either selecting a gear whilst driving or possible slecting gear and engine speed raising but vehicle not moving from a stand still start on sharp pull away. Engine speed would be running higher than required most of the time which would increase engine temp considerably. Due to extreem engine temp your air con would probably switch off as to not put additional load on your engine creating even higher tempratures. My advise is It really needs a visual / test drive to confirm a diagnosis by a qualified person for this information to be confirmed. I hope this makes sence good luck.

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fogging inside a car out of vents
with aircon happens sometimes

nothing wrong with the air con system at all .....fog will clear

scientific cause ...cold air hits hot air
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It will do. The air coming out is moist and cold to start with so it condenses on the cold glass wind screen

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2 possibilities:
1 - HVAC External Drain Tube stopped up with dirt, bee nest, etc. Hard to get to w/out a car lift. Need to clear and drain HVAC box.
2 - Leaking heater core inside HVAC box. Moisture from defog will smell sweet and be hard to clean off glass. Requires Dash removal and AC service to replace Heater Core. Very time consuming and Expensive A-Freeze fumes are also lethal if inhaled.

Try Solution #1 First, Least Expensive, Non-Lethal Condition.

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1 Answer

Heater & defroster works fine but inside car windows keep fogging


So you have the vent settings to blow out of the windshield vents and still have fogging?

You can dry out the air more quickly if you use the air conditioner setting. It sounds backwards, but this is exactly what the manual in my older car said to do. (Some cars are electronic control and won't let you do this however - or they do it automatically with the defrost vent settings).

For the older car, I would set the heat to the hottest setting and press in the a/c button. The a/c dries out the air, but it does not have to be set to run cold.

Another thing that could help is to make sure that you do not have the vents set for "recycling" the air. The picture should look like a u shapped arrow. Make sure it is not pressed in.

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If your heat is not getting hot enough, it may be time for a new thermostat. They're fairly easy to replace and can be bought at an auto parts store.

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1 Answer

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It's normal for the A/C compressor to come on with the defroster to dehumidify the air so the windsheild won't fog up under humid conditions. You can still control the air temp. out the vents with the temp. select switch.

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