Recent Topics
4.3 vortec issues
by mobilaltima. 03/18/19 09:17 PM
Recommendation for filter for Alfa Romeo 4C?
by phaphaphooey. 03/18/19 09:17 PM
What's the new wonder elixir?
by Yuk. 03/18/19 08:32 PM
Direct Injection Engines
by Al. 03/18/19 08:31 PM
Which mobil 1 for 19 versa?
by jahwarrior1423. 03/18/19 08:07 PM
RIP Dick Dale
by Donald. 03/18/19 08:06 PM
Found some rust on the roof of my car
by DreamerGT. 03/18/19 07:37 PM
What coolant would you run in a 1997 Dodge Ram?
by zfasts03. 03/18/19 07:11 PM
Is 10k miles too long for tire rotations?
by Nicasio. 03/18/19 06:47 PM
S-Oil Seven $14.88 on Amazon
by Nickdfresh. 03/18/19 06:41 PM
Power Steering Fluid - 07 Tahoe
by Plimbob. 03/18/19 06:38 PM
Oil / filter change 2015 Chevy Sonic 1.8l Automatic
by WyrTwister. 03/18/19 06:36 PM
Is this a battery issue or starter issue or ?
by simple_gifts. 03/18/19 06:24 PM
f250 - Friction modifier needed... which brand
by NattyBoh. 03/18/19 05:35 PM
Michelin's New All-Weather Tire for HD Pickups
by SubLGT. 03/18/19 04:36 PM
Newest Members
drsoils, Gbear, MadMikesMech, Indyfordfan, toplscuda
67551 Registered Users
Who's Online Now
91 registered members (Agnosto, 4WD, 2010Civic, AdditiveOCD, agpatel, 69Torino, 10 invisible), 1,506 guests, and 69 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics286,042
Posts4,901,383
Members67,551
Most Online2,967
Mar 10th, 2019
Donate to BITOG
Hop To
Electronics Experts - Honda Civic AC/Heater Blower #4676393
02/24/18 12:20 PM
02/24/18 12:20 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
So today AC/Heater blower fan stopped out of the blue for my 2003 Civic, was working flawlessly.

Based on quick search, seems like an issue :

https://honda-tech.com/forums/honda-civic-2001-2005-78/diy-how-fix-ac-power-transistor-2041582/

Does anyone know if soldering a resistor safe or no? Should I use a thermal fuse or a plain wire? Radioshack is gone, anywhere else I can locally get the part?

I have already removed the part and getting an infinite resistance between 2 contacts.

Thanks for the help thumbsup


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: maverickfhs] #4676419
02/24/18 12:46 PM
02/24/18 12:46 PM
Joined: Aug 2017
Posts: 797
MN
14Accent Offline
14Accent  Offline

Joined: Aug 2017
Posts: 797
MN
That's just a fancy name for the blower resistor. Why not just get a new one? They're cheap.


2013 Chevrolet Volt - Saves enough in fuel to pay for itself!

2003 Cadillac Seville STS - The winter "beater", it uses the Volt's fuel
Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: maverickfhs] #4676436
02/24/18 01:08 PM
02/24/18 01:08 PM
Joined: Jan 2011
Posts: 2,937
N.Ohio
Lubener Offline
Lubener  Offline

Joined: Jan 2011
Posts: 2,937
N.Ohio
That's no transistor. The thermistor is likely for current limiting. The thermistor will change resitance with temperature. They are cheap and I would just get the original part.BUT if you are determined,you could put a fixed resitor(of proper resistance and power rating) in its place. I wouldn't just place it across the thermistor without removing it. If that thermistor is good and you place a fixed value component in parallel with it, you would lower the overall resistance in the circuit causing a problem.

Last edited by Lubener; 02/24/18 01:08 PM.

The "thinking" man's friend.
Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: maverickfhs] #4676442
02/24/18 01:10 PM
02/24/18 01:10 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
Thanks, looking at another link: http://forums.clubrsx.com/showthread.php?s=f28a1734133081dd4bd4a552dde60da6&t=506999

He just shorted out both links? If not, can I just use a thermal fuse as per this: update: the defective part is called MICROTEMP rated at 2 Amp 114 degrees Celsius, the same part you'll find in Electric iron.


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: Lubener] #4676443
02/24/18 01:11 PM
02/24/18 01:11 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
Originally Posted By: Lubener
That's no transistor. The thermistor is likely for current limiting. The thermistor will change resitance with temperature. They are cheap and I would just get the original part.BUT if you are determined,you could put a fixed resitor(of proper resistance and power rating) in its place. I wouldn't just place it across the thermistor without removing it. If that thermistor is good and you place a fixed value component in parallel with it, you would lower the overall resistance in the circuit causing a problem.


Not sure, how easy is to remove the thermistor?


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: maverickfhs] #4676463
02/24/18 01:26 PM
02/24/18 01:26 PM
Joined: Sep 2015
Posts: 1,691
USA
mk378 Offline
mk378  Offline

Joined: Sep 2015
Posts: 1,691
USA
The module depends on airflow from the fan to not overheat. Check for mouse nest in the ductwork, blocked cabin air filter, failing motor bearings, etc. that caused the overheating in the first place.

Last edited by mk378; 02/24/18 01:27 PM.
Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: maverickfhs] #4676588
02/24/18 03:31 PM
02/24/18 03:31 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
Does anyone know where can I buy a thermal fuse?


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: maverickfhs] #4676629
02/24/18 04:00 PM
02/24/18 04:00 PM
Joined: Mar 2016
Posts: 1,719
Toronto
PeterPolyol Offline
PeterPolyol  Offline

Joined: Mar 2016
Posts: 1,719
Toronto
Do you have an electronics component store near you? There are a couple of online vendors like Mouser but I've never ordered from them.


On a side note, if it's a standard 4 speed blower (not continuously variable) then I only ever replace the resistor packs with this 'solid ceramic block' style


They're the most reliable units I've ever dealt with. Last conversion was on a GM with that stupid thin PC board style resistor, where several watts of heat are supposed to dissipate through a freakin circuit board. Glad I'll never have to go back in there ever again.


There's no replacement...'scosity for natural viscosity
Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: maverickfhs] #4676697
02/24/18 05:00 PM
02/24/18 05:00 PM
Joined: Sep 2015
Posts: 1,691
USA
mk378 Offline
mk378  Offline

Joined: Sep 2015
Posts: 1,691
USA
These are a transistor not a resistor. The control panel has a click knob with 4 speed settings, but internally it is digital and uses PWM to the transistor.

Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: maverickfhs] #4676708
02/24/18 05:09 PM
02/24/18 05:09 PM
Joined: Dec 2016
Posts: 2,413
MURICA
maverickfhs Offline OP
maverickfhs  Offline OP

Joined: Dec 2016
Posts: 2,413
MURICA
I know TCO is bad, since I shorted it with a wire and now fan blower is working.


2006 Civic EX 205K/AT
2006 Acura TSX 187K/AT
2007 Accord VP 151K/AT
Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: maverickfhs] #4676740
02/24/18 05:36 PM
02/24/18 05:36 PM
Joined: Dec 2006
Posts: 1,023
midwest
JamesBond Offline
JamesBond  Offline

Joined: Dec 2006
Posts: 1,023
midwest
Is this the same part as a $20 blower motor resister that I could buy on rockauto?

Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: mk378] #4676742
02/24/18 05:39 PM
02/24/18 05:39 PM
Joined: Mar 2016
Posts: 1,719
Toronto
PeterPolyol Offline
PeterPolyol  Offline

Joined: Mar 2016
Posts: 1,719
Toronto
Ah thanks mk378, I didn't know what style it used. Seems Honda consolidated down to a single logic-based part, regardless of trim level/market ie. fixed speeds vs variable fan auto climate control


There's no replacement...'scosity for natural viscosity
Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: maverickfhs] #4676845
02/24/18 07:45 PM
02/24/18 07:45 PM
Joined: May 2004
Posts: 2,506
Northeast
sxg6 Offline
sxg6  Offline

Joined: May 2004
Posts: 2,506
Northeast
I'd just replace that blower motor resistor since it's only about $20 for a new one..

Re: Electronics Experts - Honda Civic AC/Heater Blower [Re: mk378] #4677221
02/25/18 06:01 AM
02/25/18 06:01 AM
Joined: Jan 2011
Posts: 2,937
N.Ohio
Lubener Offline
Lubener  Offline

Joined: Jan 2011
Posts: 2,937
N.Ohio
Originally Posted By: mk378
These are a transistor not a resistor. The control panel has a click knob with 4 speed settings, but internally it is digital and uses PWM to the transistor.

Transistors have three leads or two and the case(collector), I do not see that in the picture. As suggested, I would just get an OEM part and be done with it.

Last edited by Lubener; 02/25/18 06:04 AM.

The "thinking" man's friend.
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™