Question about 1997 Chevrolet Venture

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No cabin heat.. windows fogged.. engine runs cold!!

I had had multiple services done but to no avail. The following symptoms exist :
- The temperature guage stays towards cold all the time, except when engine is idling for a long time.
- The cabin heat is lukewarm
- Windows get fogged up as soon as I turn the inside air circulation on. Fogging is gone when I put the defroster with a/c on.
- Engine has noticeable vibration when idling.

Recently changed thermostat, flushed cooling system and also had pressure testing done. No noticable coolant smell anywhere. Coolant is topped off as well. Mechanic recommending a heater core replacement.. and I want to know if that's the best solution to fix the heating and fogging problem.

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  • ashu9211 Jan 12, 2009

    Does it take care of temperature guage fluctuations (cold to normal)?

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Vent heat but heater motor not working

Posted on Jan 02, 2014

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Chances are the heater core is clogged and wont allow proper circulation for the heater.i would suggest getting a new one put in and see if that dosent fix it for you.

Posted on Jan 12, 2009

  • Ronnie Houston Jan 12, 2009

    yes it would

  • Ronnie Houston Jan 12, 2009

    please remember to rate me when the problem is solved. i know it will be your heater core..ive seen it before and know the symptoms,,,thanks

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Why do the windows on my 2009 caravanfog uponce Istart todrive?The windows will beclear after I warm it up but once I start drive they fog up.I do not smell antifreezeand the heater core lookslikenew.


windows fog up on the inside simply because of the hot breath of the occupants
this heat is cooled by the screen and condenses and so a fog is created
simple physics really - hot moisture + cold air =rain to over come this quickly run the air conditioner ( climate control) and that takes the moisture out of the air in the car and then the windscreen clears
you are going to say that it is too cold for the ac to run well at the same time run the heater until you have a pleasant temperature that is dry ( climate control--when it gets too hot the ac cuts in and when it gets to cold the ac switches off BUT the moisture that causes the fog on the windows is gone )

Nov 11, 2015 | Cars & Trucks

Tip

Tips for operating Air conditioning system on Toyota Hilux and someother...


To cool off your Toyota after it has been parked in the hot sun, drive with the windows open for a few minutes. This vents the hot air, allowing the air conditioning to cool the interior more quickly.

Make sure the air intake grilles in front of the windshield are not blocked (by leaves or snow, for example).

On humid, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

Keep the area under the front seats clear to allow air to circulate throughout the vehicle.

On cold days, set the fan speed to high for a minute to help clear the intake ducts of snow or moisture. This can reduce the amount of fogging on the windows.

When driving on dusty roads, close all windows. If dust thrown up b the vehicle is still drawn into the vehicle after closing the windows, it is recommended that the in intake be set to FRESH and the fan speed to any setting except "OFF".

If following another vehicle on a dusty road, or driving in windy and dusty conditions, it is recommended that the air intake be temporarily set to RECIRCULATE, which will close off the outside passage and prevent outside air and dust from entering the vehicle interior.

HEATING

For best results, set controls to;
Fan speed ---- Any setting except "OFF"
Temperature----Towards WARM (red zone)
Air intake ---- FRESH (outside air)
Air flow ---- FLOOR
Air conditioning ---- OFF

For quick heating, select recirculated air for a few minutes. To keep the windows from fogging, select fresh after the vehicle has been warmed.

Press the "A/C" button on for dehumidified heating.

Choose floor/windshield air flow to heat the voltage interior while defrosting or defogging the windshield.

AIR CONDITIONING

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

For quick cooling, move the air intake selector to recirculate for a few minutes.

VENTILATION

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

DEFOGGING

The inside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone) to heat; COLD (blue zone) to cool
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- ON

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

On humid days, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

DEFROSTING

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

To heat the vehicle interior while defrosting the windshield, choose floor/windshield air flow.

on Feb 14, 2011 | Toyota Pickup Cars & Trucks

1 Answer

Fogged up windows


Are you using the fresh air option ?
If you are, you could have excessive moisture inside the cabin. Running the hvac on defrost should kick on the ac compressor and bring in fresh air too.

Feb 10, 2014 | 2009 Dodge Charger SXT

1 Answer

Too much time to warm up to 90c on winter, cabin heating is ok after 2km


System is functioning normally at this time, no action is required.

Dec 22, 2013 | 2005 Peugeot 405

1 Answer

2007 Chrysler 300. When outside temperature is below 30 degrees, I cannot keep the windows clear of moisture and fog. Even the defroster on high has difficulty clearing and keeping the windows clear. I do...


If your car has an air conditioner turn it on as well as the heater . Air conditioned air is very dry and usually defrosts the windscreen quickly. The heat from the heater will overcome the cold air from the air/con. It is good for the air/con to be run during the winter months as well as summer, it stops the seals drying out and leaking refrigerent.

Apr 05, 2011 | 2007 Chrysler 300 AWD Sedan

1 Answer

After a cold start, I don't get cabin heat for about 15 minutes. The heat gauge starts at C (cold), rises to normal operating temperature, then rises to just under the H (hot) for about 30 seconds, at...


Check for low coolant, you might also have a sticking thermostat. Alot of fords get air pockets, make sure if it needs coolant to let it run for about 10-15 min with the radiator cap off.

Oct 15, 2010 | 2003 Ford F150 Regular Cab

4 Answers

2004 Chevy Impala no heat from defrost or heater


No heat is often a symptom of low coolant, usually followed by overheat. There are other controls that regulate heater, but right now, re-fill the cooling system with engine running and heater on high, then check for leaks (coolant you lost went somewhere...you need to determine where) Low coolant will damage your engine. Take care of that first, then if heater still does not work, then do diagnosis on that. (if you loose the engine heat won't matter, will it!)

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1 Answer

99 Grand Am GT windows fog up


Fog on the windows is caused by moisture in the air condensing on the cold glass. You probably knew that. So the solution to your problem is to reduce the humidity in the car or warm the glass above the dewpoint. Running the AC will help because any moisture in the air will condense on the much colder evaporator coils before it gets to the windows, but as soon as you turn the AC off that moisture goes right back into the air. Fresh air from outside will help if the moisture level in the outside air is lower, which it ussually is in the winter. The only sure solution is to warm the glass.
You may want to check a service manual and see if there is an air filter somewhere in the cabin heat plenum. If so you may want to replace it. Defrosters and side vents should provide plenty of warm air to clear all windows and it sounds like your just not getting enough air flow. If you're not really into getting behind the dash and tinkering with the heater plenum, you might consider a small 12 volt heater like the ones available at auto parts stores, or you could just let the cabin warm up well before driving. There are also glass treatments that you can use to prevent fogging, I used one for years on a motorcycle helmet, These are ussually a wax and or soap base so they have to be cleaned off and reapplied periodically, but they do work well.

Nov 15, 2008 | 1999 Pontiac Grand Am GT

2 Answers

Fogging


I had the same problem. Thought about leaks major problems etcc

Turns out there is an air filter behind the glove box. Totally clogged with ****. replaced no more fogging.

Nov 02, 2008 | 2002 Jaguar X-Type

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