 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Honda Cars / December 2005heater fan
I have a 1990 honda civic. The heater/defroster fan has 4 speeds. The first 2 do not work and the last 2 work intermitantly.n Sometimes when I come to a stop or just slow down or let up on the gas the fan motor will speed up. Also, it seems the hotter outside it gets the less the fan works. Is this a motor replacement problem? If so, is there a link somewhere that I can use to learn how to replace/repair it? Thanks, Bill > I have a 1990 honda civic. The heater/defroster fan has 4 speeds. The > first 2 do not work and the last 2 work intermitantly.n Sometimes when I [quoted text clipped - 3 lines] > somewhere that I can use to learn how to replace/repair it? Thanks, > Bill Blower resistor. Remove glove box. Resistor is right in front of you in heater duct. About $40 new at the dealer. You can fix them yourself with resistor wire if you know how to solder.  SignatureTeGGeR® The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ > I have a 1990 honda civic. The heater/defroster fan has 4 speeds. The > first 2 do not work and the last 2 work intermitantly.n ... > Is this a motor replacement problem? Probably not. First, check the blower resistor assembly. It's usually in the blower box. At the low fan speeds it has to dissipate a lot of heat so they put in the path of the air flow. Eventually those power resistor elements deteriorate and open up. That's what causes the loss of some fan speeds. The blower resistor on my '88 Prelude has one electrical connector on it and is held in the blower box with two screws. Yours, like mine, probably has three resistor elements. -- Chuck Thank you for your replies. I have one quick question. Is there a way to test the resistor to make sure thats what the problem is without buying expensive equipment? Thanks, Bill > Thank you for your replies. I have one quick question. Is there a > way to test the resistor to make sure thats what the problem is > without buying expensive equipment? Yeah. Pull it and have a look at it with your eyes. If any of the wires are broken (split in two or more pieces), then it's bad. SignatureTeGGeR® The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ I finally replaced the blower resistor and the blower worked fine and all 4 speeds. But now I have another problem. The fan speeds up and slows down and it is especially noticable on high. I can turn the fan completly off and turn it back on high and it works good for a few seconds and slows down. It also speeds up when I slow down or come to a stop. Seems to be erratic. Is this a voltage regulator problem or alternator belt problems? Or what? I am stumped! > I finally replaced the blower resistor and the blower worked fine and all 4 > speeds. But now I have another problem. The fan speeds up and slows down [quoted text clipped - 3 lines] > erratic. Is this a voltage regulator problem or alternator belt problems? > Or what? I am stumped! could be a fan bearing. how old is the vehicle? 1990 honda civic 4 door 5 speed It's me again. I replaced the blower sensor and then the fan worked. But slower than I thought. Now it sometimes does not work at all so I hit it with a hammer and it goes. But I don't think it is working like it should. I think it needs replacing. Can someone tell me how to get the blower motor out? I spent 3 to 4 hours removing the glove box and then the area where the blower is and I still could not remove it. Seems there are air ducts in the way. Do I need to remove more of the dash and what else??? Thanks, Bill > Can someone tell me how to get the blower > motor out? I spent 3 to 4 hours removing the glove box and then the area > where the blower is and I still could not remove it. Seems there are air > ducts in the way. Do I need to remove more of the dash and what else??? It shouldn't be necessary to remove more of the dash. For what it's worth, the service manual for my 1988 Prelude says: Remove the battery negative terminal. Remove the glove box and glove box frame. Remove the heater duct (to the left of the blower). Remove three mounting bolts holding the blower assembly. Disconnect the wiring to the blower motor, resistor and recirculation control motor. Remove the blower assembly. If you want to feel bad, remember that there are several people back in the factory that can install one in less than 30 seconds. -- Chuck > I finally replaced the blower resistor and the blower worked fine and > all 4 speeds. But now I have another problem. The fan speeds up and [quoted text clipped - 4 lines] > alternator belt problems? > Or what? I am stumped! How's your battery? Turn your headlights on, then compare brightness at idle and at 2,000 rpm. I suspect your battery is dying, or the cables are corroded/frayed/loose. You just never noticed this until all the fan speeds worked again. SignatureTeGGeR® The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ I had battery checked and it needed replacement. I did that and the heater fan worked and then it started slowing down and not working at all. I suspect the motor is going,,,do you? Is it hard to remove that?? Thanks, Bill > Thank you for your replies. I have one quick question. Is there a way to > test the resistor to make sure thats what the problem is without buying > expensive equipment? > Thanks, > Bill ============================ Yes, perform a resistance test on it. There will be three resistors, probably, and the readings will be something like 3 Ohms, 8 Ohms, and 12 Ohms, or something like that. I don't have a schematic for a Civic, but you just slip it our and look closely . . You'll probably see the problem. Check that there isn't crud blocking the air from cooling it, or corroded terminals inside the connector you have to slip off. Plastic windshield cowl might be leaking water into resistor pack and corroding it. 1st gen CR-v does that. 'Curly' |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2009 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.