Question about 1992 Subaru Legacy

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Heating and air conditioning fan is intermittent

I have had a problem with the heating and air conditioning fan in my car for years. Mostly the ventilation fan won't work, but every once in a while it will turn on for no apparent reason. I always leave the control in the on position hoping it will magically turn back on again, but lately it doesn't seem like it's coming back.

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There is a fan resistor card in the evap housing(under glove box) that controls fan speeds

Posted on Jun 22, 2009

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Posted on Jan 02, 2017

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Why still over heating, replaced all last year, water pump, stat, flushed rad


Possible causes....Poor internal circulation or heat exchange due to blockage or corrosion/scale.
Likely causes.... Electric rad fan (if so equipped) failing to turn on, or broken fan belt (if so equipped), or broken, damaged or missing fan blades, or blockage of air into radiator (lots of bug guts, plastic, paper, debris in general), or damage to radiator itself. (cooling fins are mostly bent over restricting air flow or circulation, scale build up inside of the radiator...not always "flushable" preventing good heat exchange.
One or some of these maybe causing your grief. Good Luck.

Feb 25, 2016 | 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

What is difference between on an auto on thermostate


I'm not sure exactly how this applies specifically in a car, but on a home heating and cooling (air conditioning) thermostat, it is often associated with the fan or blower setting.

If for a system fan:

"Auto On" setting in a heating / cooling system would start the fan when the temperature climbed above or dropped below the setting you on the thermostat and start the heat or cooling source. Once the thermometer indicates the desired temperature had been reached, the heating / cooling source would be stopped and the fan would turn off.

"On" would run the fan all the time, regardless if the thermostat tired to start the heat or cooling source. This would result in constant circulation of the air in the space(s) and tend to keep warm or cool spots (rooms) from being created.
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Nov 30, 2015 | Cars & Trucks

1 Answer

Once i on my car a/c the car does over heating


your car should have two cooling fans,one is for the engine radiator and the other for the air conditioning.The engine is getting overheated when air conditioning is on I strongly believe the fan for the a/c is not working.The other reason is the air condition does not have enough freon , Top up the ac and follow it .

Aug 28, 2012 | 1999 Oldsmobile Alero

1 Answer

The fan stopped blowing for the air conditioning and heating


Check the fuses, or the whole knob assembly went bad.

Oct 15, 2017 | 2005 Nissan Sentra

1 Answer

I am in saudiarab i have crown victoria 97 model it is working good but i have problum in air condition system when i run my car its running good no problum but when i start my air condition it is heating...


The air conditioning condenser creates a lot of heat when the a/c is on. The cooling fan is supposed to run the whole time the a/c is on to keep it cool. If the fan isn't on, the radiator will absorb this heat and cause your car to over heat. You should also check your coolant level. So, it sounds to me like your cooling fan isn't working.

Sep 13, 2011 | 1997 Ford Crown Victoria

1 Answer

The compass and cruise control first started to work only intermittently and now dont work at all. Now the fan for the heating and air cond also stopped working


Look for a fuse for the Cruise Control and compass.
Also, the fan for the heating and air conditioning usually wears out (brushes get worn out) and possibly requires a relay as well to make it work reliably.
I don't think the two conditions Cruise Control vs. the Ventilation Fan are related.

Sep 02, 2010 | 1999 Oldsmobile Intrigue

1 Answer

Air conditioning / heating system fan works on


Fan resister circute/switch needs to be replaced. Not expensive. Buy from dealer.

Aug 02, 2010 | 1993 Nissan Pathfinder

1 Answer

1999 mercury sable ls air conditioning fan


see if you can turn the fan by hand with the car not running. if so chek the temp switch. unplug it and start car fan should start rite away. if not chek fuses.

Apr 25, 2010 | 1999 Mercury Sable

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