It Wasn't Me

See if this is of any help: https://honda-tech.com/forums/honda-civic-2001-2005-78/c-problem-02-honda-civic-2614646/

85_305

You guys should check out MY ac thread and give me some help.. I'm stumped and going crazy

https://honda-tech.com/forums/honda-civic-2001-2005-78/my-ac-heater-doesnt-work-wtf-2615600/

gudoffer

okay i suck at the resistor things...but yea

What exact resistor is it ?

What is the colour code ?

:S

85_305

Look at the links provided.. it shows you exactly which one to test

Pistol1

Just registered to say thanks, I fixed the transistor in my 04 Civic with this excellent tutorial


I do plan to replace the transistor assembly (when I can find one!), but this keeps me going in the meantime. Is it totally safe? My dust and pollen filters were pretty badly clogged up which I guess contributed to the thermal fuse failing, so I'll be replacing the filters asap - is it safe to keep using this resistor mod for a while though?


Also, my 04 model (1.4si) was a pain to get the transistor out. I almost gave up on finding the thing at all, but I remembered a post I had seen somewhere about 04 civics having a metal box in the way that was secured by 3 bolts, which had to be removed in order to access the transistor. There it was, hiding behind the box.


My transistor was also different to the one pictured - looks like a cheaper part, that's progress for you huh. Anyway, I eventually realised that although the PCB was arranged differently, it was still easy to identify the correct two pins to solder the resistor between. There is a hole you can see the thermal fuse through! Look closely at the pics and you can see the thermal fuse underneath. I'll post some pics of mine when I get them off the camera.

Vitor

Here's the description for the troubleshooting, repair and replacemet of the blower not working problem on my '04 Civic Hybrid.
If the temperature fuse is blown, it is because of the lack of air flow over the power transistor and that often causes the power transistor K2313 or SK2313 to fail as well.
A change of pollen filters is a must after repairing or replacing the transistor.
http://home.earthlink.net/~vicrocha/...onda_index.htm

theineffable

IMO, the proper fix is the replace the thermal cutoff and also the mosfet transistor if it's bad too.

jivi

update: the defective part is called MICROTEMP rated at 2 Amp 114 degrees Celsius, the same part you'll find in Electric iron.

MaxwellT

I tried this and it did not work. What would you suggest to try next?

BONDN007

Hey JIVI, I do not know if you are still posting? I just joined the site and want to say thank you for a ridiculously easy fix, it took me longer to run and get the resistor than the time it took me todo the repair. Hot air blowing once again, it worked great!

Thanks again,
Noah

Mr_Plenty

this works....did it for a friend a few weeks ago...thanks guys

jeleal

good afternoon everyone, sorry to bump an old thread, but I seem to be having the same issue here. I have a 2002 Civic EX and my A/C stopped working this afternoon. Worked great on the way to work, now - poof. Nothin.

I replaced my cabin filters about a month ago for the first time. I had no idea the filters were there - common ignorance - and the A/C had been working like a champ. Then this morning, it stopped working.

I pulled the transistor out of the car and checked for resistance on the two posts as described here in this thread. My DMM says "0.F" which I assume to mean 'no resistance.' Well, I decided I needed to find a 1ohm resistor to try this fix, but then something else caught my attention. I found this page:

http://home.earthlink.net/~vicrocha/...Transistor.pdf

And I ran that test using my DMM. The two posts there read 1.4 or so, so now I'm thinking the Transistor is fine. I saw this page also - http://home.earthlink.net/~vicrocha/...onda_index.htm and I'm a little confused.

How do I supply power to that pin?

Thanks for any help.

It Wasn't Me

Have you checked the fuses and relays? You didn't mention that, so I thought I'd ask.


What are the (radiator and condenser) fans doing?

If the blower motor is still working, it's not likely that the power transistor is the culprit. There are a number of things that can prevent your A/C from working, though.

This might help a bit, too. https://honda-tech.com/forums/honda-civic-2001-2005-78/new-here-got-c-problem-died-2891710/


Have you had the pressure checked?

When's the last time your A/C system was serviced/charged?

justinsbg

I'm fairly new to the electronics repair world and I just had a question about this resistor repair. I'm a Honda service technician so I've replaced my fair share of complete resistor/transistor units, and I've recently been taking them apart and learning about the components on the PCB. From what I understand (in a nutshell), the way that temperature co-efficient resistor works is as temperature increases resistance increases, and as temperature decreases resistance decreases, and this is to limit current to the motor windings. My question is this, how can a standard 1ohm resistor provide that same protection? Over a period of time wouldn't that wear the blower motor out pre-maturely? If you could help me out and let me know if I'm missing something I would be greatly appreciative. I've been trying to find that temp coefficient resistor by part number and can't, and if I'm repairing these things for customers I need to know that the fix you've provided is a long term one. If you know the specs of that temp coefficient resistor that would also be most helpful. I do some dealings with Mouser Electronics and if I had the specs I could just order that resistor and be done with it. Thanks for your post.

buckthorn

i desoldered the brown capitor and i am trying to put it back on. Does it have a positve and negative on that capitor? Thanks

It Wasn't Me

Reinstall it in the same position that it was in when you took it off, or how it appears in the photos.

hernanb

Hey, great! this really worked for me!

In the workshop they told me that the compressor was broken and everywhere else they didn't know what the vehicle had. They recommended me to go to the Honda dealer, but they had an appointment in two months. I've just followed those very simple steps and now I have normal AC three days before going to vacation.

Thanks!

lapchern

thanks this helped! i blindly went in and tried it out and this did the trick.

a few notes...

radioshack doesn't sell the 1 ohm 1/4w resistors... i had to go to frys for them

ahfai

Thank you for this wonderful post, I am able to fix my 04 Accord to have fan blowing again. The pictures in this post really helps.

I could not find the 1 ohm resistor in Radioshack. I ended up getting the 10 ohm resistors (they have 5 0.5 watts 10-ohm resistors for about $1.30) at Radioshack and parallel 2 of them. So I get by using 5 ohm (parallel 2 10-ohms resistor gives you a 5-ohm resistor) instead of the 1 ohm. Anyway, it still works.

For the people who have fixed their fan problem using this resistor fix, do any of you end up replacing the blow motor transistor at the end? If you do, could you please tell us how long this fix lasted? I just want to know if this is a some what "permanent" fix .

Many thanks again for this post.

parecho

Got all excited when I found this thread...only to remove the part and it looks totally different than the one pictured here! What do I do? Its a 2006 Honda Civic.

EDIT: though it doesnt look exactly the same, I went with what looked similar...tested with multimeter..no reading...soldered on the resistor i got from Radio Shack, and it works PERFECT! Thanks! This thread was a LIFESAVER!

rizzlehd

I just got a used 2001 Civic HX and after a couple days the fan blower failed on me... Mechanic said it was a bad relay, then I saw this thread. Purchased and soldered a 1ohm resistor on the PCB, and it hot damn it worked! Thanks OP! HT FTW.

Hopsdak

Thanks to the OP!
I did this mod last summer and just used a wire to jumper instead of a resistor.
Worked like a charm.

parecho

So..this only worked for 3 weeks and now its acting up again. Did I use the right resistor?

1k-Ohm Resistors, 1/4 watt, 5% tolerance from Radio Shack. Is there something else I should have used? do I just replace it again? I just dont want to have to solder every 3 weeks..but dont really wanna dish out the cash to replace the part either. Help?

jwood1933

Awesome I literally got my honda 5 days ago and the AC stopped blowing. I did this fix in 15 min and it started blowing cold AC right away. THANK YOU saved my time and money!

boostedsol

Just wanted to say thank you for this post!

I just did the solder with a 1 ohm 1/4 watt resistor and it worked like a charm... Had super dirty cabin filters, so cleaned them out replaced and everything works perfect again.

We had a crazy dust stom here in AZ the other day so I think that was the final straw for my cabin filters. They were filled with dirt leaves, etc..

Went to local Radio Shack , pad 9.99 for a solder kit, and 1.99 for a pk of resistors.
Total cost 12 bucks to fix this... saved 50 to 70 bucks for a new part. Awesome