Question about 1998 Toyota Corolla

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My air conditioning and heater work but my air conditioning/ heater fan does not turn on

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You need to get to your fan and test the resistance on the fan harness. If that checks out OK I would look at the switch. I am surfe you have already checked the fuse.

Posted on Aug 10, 2010

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Why does radiator fan work when air is on but not when heater is on?


Have you waited long enough?
Sometimes it can take 5 -10 minutes before it turns on while using heater.

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96 ford taurus 3L. Heater blows hot air only


If you want to leave the heater inop the best way is to go under the dash you probably have to remove the cover under the glove cpmpartment
Locate the fan motor and unplugged

Sep 12, 2014 | Cars & Trucks

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Heater not working in extreme cold weather because fan wont shut off. fan has been replace and the computer has been checked. nobody knows what is wrong


I'm making some assumptions, here.. I've been told I make too many assumptions... but, I'm assuming that you're talking about the engine cooling fan.. If I'm correct in this assumption, my guess is that you've not taken the vehicle to a good, reputable mechanic or repair shop. There are several reasons that an engine fan would not turn off, and each reason would have to come from a qualified mechanic. For example, there is a sending unit for the air conditioning system that might cause continuous running... or a sending unit in the air conditioning system that could cause the same thing. To complicate that issue, quite likely your air conditioning system purposely kicks on the engine fan any time you run your defroster. Also, your inside heater should function correctly, regardless of the engine fan running continuously. If I'm wrong on that score, then your engine has a thermostat problem "to boot"... which, by itself, could cause poor heating of the inside of the vehicle. NOW, backing up a little, if you so happen to be talking about the fan INSIDE the vehicle that is part of your heating OR air conditioning, we have a little different matter on our hands... First, some vehicles legitimately have a fan running on slow speed at ALL times.. for continuous air circulation purposes (sometimes, you can't actually hear this). Also, I might add that THIS fan running all the time should not be a problem for the heater to work properly.

Jan 03, 2014 | Cars & Trucks

1 Answer

2000 acura tl ac heater fan wont turn on


my acura tl fan turn on when i turn on air conditioning why

Aug 22, 2012 | 2000 Acura TL

1 Answer

Hi just wonder why my 2000 cavilier would still blow hot air when the heater is shut off


The vehicle is probably engineered that way, years back GM introduced what they called Astro ventillation tyo the Chevette line of vehicles, I had just started working for a dealership that was going to be slandered all over the news because they couldn't repair the vehicle from blowing warm air even though the fan and heater slide were turned off.
This was my first job in the dealer after the problem went around the shop for a month or two, I found an article paragraph on the first page of our in house reair manual for heater and air condition trouble shooting Chevrolet Chevette, it stated that the car with the key on whether running or not would keep a constant flow of air throughout its outer body skins called an Astro Ventillation system and its purpose was to keep any toxic and/or flammable gas fumes out of the vehicles cabin space.
It was around for a long time and probablyl is the reason why you have this same condition of warm air flow, its a constant turning of the heater blower fan.
Happy Motoring!!!

Jun 07, 2010 | 2000 Chevrolet Cavalier

1 Answer

When you turn the heat on the blower motor starts making a grinding noise


could have debris in the fan housing or the blower motor bushings or bearings are going out. take the fan out of the air conditioning case and vacuum out the air conditioning/heater core assembly case. then hook everything back up and see if this works.

Oct 12, 2009 | 2000 Chevrolet Silverado 1500

1 Answer

Heater and a/c fan doesnt turn on


Your fan motor has either burned out or there is a short in the wiring. Check for voltage at the fan motor plug under the dashboard. If you have power there then the motor is bad, replace the motor and you should be good to go.

Oct 09, 2009 | 1999 Ford Ranger SuperCab

1 Answer

Fan not turning off


check the relay switch for the cooling fans . they should be under the hood in the power supply box , sounds like the relay is sticking .

Dec 04, 2008 | 2000 Saturn Ls 4dr Sedan

1 Answer

Air condition


Check the following fuses:
10 amp GAUGE under the dash, and the 40 amp HEATER under the hood.
If both fuses are good, I suspect that you may either have a bad fan switch or a bad heater fan motor. The switches are rare to fail, I would suspect the heater motor first. Please try this: Turn the key on; turn the fan switch to high. Look under & behind the glovebox, for the bottom of the heater fan motor. Round thing with 3 screws holding it to the heater box. Using a small hammer, or something that you can tap with, tap on the bottom of the heater fan motor. You just may jar the motor enough to make it run. If it comes back on, you may need to replace it at some point in the near future. Worked for me quite a few times. Try that, repost to me what happens. Hope this helps.

Oct 10, 2008 | 2003 Toyota Corolla

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