Question about 1999 Oldsmobile Bravada

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Why does heat come out of the vent all the time, even if i try to get the vent fresh air from the outside, no cold air at all, only very hot air.

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The vacuum motor may be disconnected from a vacuum line or the flap is stuck inside.

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No heat or air in cabin of 1992 honda accord


You may have two problems here. If there's no fresh air coming in then perhaps the vent is closed and the actuator that opens it is stuck, but you should still get heat even if the air control is stuck in recirculate mode. Does the car overheat? Where is the temperature gauge after you've driven for 15 minutes or so? Does it move off "COLD" and stop somewhere in between HOT and COLD? If your car isn't leaking coolant, either inside the cabin or outside, and the temp gauge is more or less halfway between hot and cold, then it sounds like you have a blocked heater core or hose. Even if your fan doesn't work you should get some heat. You might take it to a garage and have them pressure test your cooling system.

Feb 23, 2015 | 1992 Honda Accord

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

98 caravan outside air always coming in


Put the vent on inside air circulation,not fresh air,then no air will come out.

Dec 03, 2012 | 1998 Dodge Caravan

1 Answer

Rear vents blow out hot air when a/c is on


Keep this principle in mind: Heat, flows INTO cold... When you hold an ice cube in your hand, your hand gets cold because the heat from your hand is flowing INTO the clod ice cube, NOT because the cold is flowing into your hand.

On this particular vehicle (like many modern vehicles), hot water from the engine flows through the heater core at all times, even when you have the A/C on or when you have nothing (A/C, heat or vent) on. The system uses a door that closes down over the air opening to the heater core to keep you from feeling warm/hot air when it is not desired. The reason(s) you feel that the vent air is warm even when the outside temperature is somewhat cool is/could be caused by the following:

First, although as mentioned above, the heater core is restricted from receiving air when you are not commanding heat by the control panel, the heater core ultimately ends up as warm as the engine temperature. This is generally somewhere around 200 degrees F. Because all the air coming out of your vent(s) must pass over the door that restricts air over the heater core, and because the heater core gets so hot, some of that heat is picked up by air passing over the hot door even though it is closed.

Second, the door that restricts airflow from passing over the heater core has a seal around it. After a period of time this rubber (or usually felt) seal deteriorates, allowing some air to actually pass over the heater core. Since the core is hot all the time, some of the air gets heat loaded, producing warmed air.

Third, the door is operated by (in the case of your vehicle) an electric motor which responds gradually/proportionately to the setting you select on the temperature dial. If the motor gets out of calibration (can happen from time to time), if the control head has a 'glitch' and sends an incorrect signal (chronically, usually), or if the electric motor (called an actuator and contains its own little electronic 'brain') becomes faulty, the door may not be closing completely. This symptom can also be caused by a problem with the door itself, where the door gets stuck due to warping of the plastic case, a foreign object preventing it from closing (usually a pen or toy dropped into a vent or defrost opening), or a broken or cracked door hinge.

Last, the vent intake opening, where the 'fresh' air comes into the car on the 'vent' setting, is located just below the windshield on the passenger side. This opening receives its air directly off of the sun-baked, engine-heated hood and because of this the air is never as cool as outside air even on a cooler night.

I hope this answers your question. Many domestic vehicle manufacturers have begun installing heater control valves on their vehicles once again as they nearly all used to have. Note that the fix for most everything I have mentioned here requires removal of the dash of the vehicle or replacement of the control head and therefore is in many cases not worth the investment if it is not an extreme problem (for example, unless the system is stuck on full heat in the middle of summer. Additionally, remember that, if you so desire, manual shutoff valves can be placed in the heater hose lines (please consult a qualified mechanic as water from a vehicle can and will scald and burn you!), allowing you to manually shut off the flow of water into the heater core, thus reducing some of the heat (Readers note that certain foreign vehicles REQUIRE water flow through the heater core at all times for engine cooling and are not candidates for this procedure!).


Parts Of BMW.

May 30, 2012 | Cars & Trucks

1 Answer

Heater in 2003 Dodge Ram 1500 blow cold air out of vents on driver side and warm air on passenger side when turned to heat.What could be possible cause?


Not sure about your dodge, but on hondas there is a lever under the driver side vent to allow fresh(outside air) when its cold out, it will be cold, even with the heat on inside, so check to see if your has that lever somewhere on that side...hope that helps

Jan 02, 2011 | 2003 Dodge Ram Maxi

1 Answer

I have a 1991 corolla i have a problem with the heater it blows cold air out the center vents and warm air from the two side vents when on heat?


if my memory serves me correctly, this is what its supposed to do,the two centre vents are cold,fresh air only the rest are airmix vents,hot and cold.yes, we had lots of complaints about drafts.....

Dec 18, 2010 | 1991 Toyota Corolla

1 Answer

Temperature from window vent is hot when air con on othersd are cold as set


It's likely that your car has whats called a "Blow through system". The system has a few vents that aren't connected to the a/c or heatin system and just bring in straight air from the outside. The point being that fresh air is always circulated. Are the same vents cold in the winter even with the heat on?

Nov 20, 2009 | 1997 BMW 5 Series

1 Answer

99 Venture, Passenger side gets cold, drivers side stays hot


SOUNDS LIKE THE VENTS ARE PULLING AIR FROM OUTSIDE, YOU CONTROLS FOR THE VENTS ARE OFF SINQ. TRY TO MOVE THE CONTROL BACK AND FORTH WORK THEM HOT TO COLD AND DEFOAST TO HEAT TO AIR WORK ALL THOSE EVERY WAY YOU CAN ,MIGHT HAVE A STICKING VENT OR VALUE, THANKS HOPE THIS HELPS ,ROBERT

Jun 16, 2009 | 1999 Chevrolet Venture

1 Answer

Ac vent problem


Damper/flap for driver's side is probably stuck. Try moving the selector from cold to hot several times. Also, move the recirc/outside air control if the previous doesn't work.

Jun 02, 2009 | 2000 Pontiac Grand Prix

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