AC/Heater fan not working -

Go Back > General Automotive > Mechanical Problems & Technical Chat

Welcome to the
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

LinkBack Thread Tools Search this Thread
Old 06-26-2008, 02:18 PM
Join Date: Jun 2008
Posts: 3
Default AC/Heater fan not working


I've got a 97 Civic and the fan is not working on the AC/Heater. The AC works - as does the heat - air will force through the vents while driving and blow hot or cold, but the fan does not turn on.

For a long time, it only stopped working intermittently, Then it started not working when it gor extremely hot or extremely cold (of course). Later, it would come back on when I hit a bump or ran over a railroad track.

Lately, it's just not worked at all.

Recently, I took it in for inspection and they said I needed an "AC Motor Mount" which apparently meant the motor mount on the "AC side" of the motor. My thinking is, if the motor mount was loos/broken, hitting those bumps may have been hitting the AC fan motor and that's why it would come back on.

Anyways, it sounds like it could be simply aloose connection that's finally come all the way loose. Anyway, what I want to know is if there's any way I can check? I don't even know where any of that stuff is! Is the AC fan motor accessible from under the hood, or is it a take the dash out kind of thing?

Reply With Quote
Old 06-26-2008, 02:45 PM
RonJ's Avatar
Recognized HCF Member
1997 Honda Civic
Join Date: Sep 2007
Location: Houston, Texas
Posts: 9,453
Default RE: AC/Heater fan not working

The A/C motor mount is likely a separate unrelated issue.

It sounds like the condenser fan (next to radiator fan) is fine and that the blower motor (passenger front side just behind glove box) or its circuit is the problem.

1) Start by supplying battery power directly to the blower motor. If it runs, the problem is with the circuit (steps 2-4). Note whether the blower connector is loose.

2) Check whether fuse no. 55 (under-hood) or no. 17 (under-dash) is blown or loose.

3) Check whether the blower motor fan relay in the under-hood fuse relay box is faulty.

4) Check whether the blower resistor or blower switch is bad.

For details, see link to the 96-98 service manual in my signature.
Reply With Quote
Old 06-26-2008, 06:38 PM
Recognized HCF Member
Join Date: Jun 2007
Posts: 10,023
Default RE: AC/Heater fan not working

Look up under the dash on the extreme right side of the car. You will see a cylindrical part on a black plastic flange which is the bottom of the motor. Plugged into it is a 2 wire plug, the power for the motor. Turn the key on and set the fan on high and measure the voltage between the 2 wires. If you have approximately 12 volts there but the motor doesn't run, the motor is bad. I think you can take the screws out and R&R the motor without taking any of the dash apart.

If you have zero volts keep checking the fuses, relay, switch, and resistor.
Reply With Quote
Old 06-28-2008, 08:20 AM
Join Date: Jun 2008
Posts: 3
Default RE: AC/Heater fan not working

Ok, thanks for the "dummy" explanation (which I sorely need).

I'll check the voltage and see what's going on.

Reply With Quote
Old 07-01-2008, 12:36 PM
Join Date: Jun 2008
Posts: 3
Default RE: AC/Heater fan not working

Thanks Guys!

I was able to remove the old fan, troubleshoot, and bought a new one and replaced it myself.

I feel both a sense of accomplishment and a sense of cool!!!

Thanks again.

Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
2004 Civic EX Heater not working when at idle, not over heating, temp gauge normal chloiebear21 Mechanical Problems & Technical Chat 4 12-24-2012 11:46 PM
2004 EX a/c-heater fan suddenly quit working wearelove Mechanical Problems & Technical Chat 14 10-11-2012 08:56 AM
Heater not working honda civic imagine 03 safo Mechanical Problems & Technical Chat 3 11-18-2008 10:57 AM
Heater fan not blowing Seamus Inside and Out 1 05-21-2008 08:54 PM
Dome Light not working, Int. Wiper not working....HELP!!! chrisroug Mechanical Problems & Technical Chat 2 10-02-2006 11:36 AM

96, 98, ac, blower, broken, civic, fan, fans, heater, honda, intermittently, liek, sounds, turn, working

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -8. The time now is 01:01 PM.

Honda and the Honda marquee are registered trademarks of the American Honda Motor Company, Inc. Neither American Honda Motor Company nor its subsidiaries or affiliates shall bear any responsibility for content, comments, or advertising. is not affiliated with American Honda Motor Company in any way. American Honda Motor Company does not sponsor, support, or endorse in any way. Copyright/trademark/sales mark infringements are not intended or implied.