looking for advice on Honda CRV air cinditioning fan not working

Hi everyone,
Could someone out ther ehelp me to locate where the problem exists
that makes my inside cabin fan not work at all.Yes this means that
there is also no air conditioning function.When the lower right (fan)
knob is turned, nothing happens at all.There are no blown
fuses.Someone suggested to check "the ballast resistor or coils or
transistor" but they did not specify where these are found.
Any advice would be appreciated.Thanks.

 

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You haven't provided any details (but it's Psychic Wednesday) so start
by looking here:
http://www.hondasuv.com/members/showthread.php?t=9563&highlight=transistor

Sign in and SEARCH, since it's been covered many times already. If it's
not working even if you turn it all the way until you hear the 'click',
it's probably not the transistor (but we don't know what model / year /
market you're asking for help on).

'Curly'

 

Sorry Curly,
You are right. I just realised that I did not provide any details. The
model is CRV for the Australian market. The year is 2002.

 

Hi again Curly,
I read the article in Honda SUV called "Heater/AC fan only works on
high speed " with interest.The difference here is that the heater knob
does nothing in any positions (not even fully to the right).I have
never had any water leak problems either.If water is leaking into the
area, will it always reach the carpet?I had a look at the San Leandro
Honda parts site and coudn't work out where the transistor is in their
diagram.Is it the part labelled "8" in diagram on the following page?
http://www.slhondaparts.com/browse.asp?Model=CR%2DV&Year=2002&TrimLevel=5DR+LX+4WD&TransLevel=4ATKA&Section=E&Category=B++1710%7CHEATER+BLOWER&Doors=5&Emissions=KA&PartCatalogId=14S9A0&ViewParts=true

 

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Put your cursor on part number 8 and you can go to the parts list, or
right-click and 'Open in a new TAB'.

There may not be a high speed (overide) switch on your CR-V, since it's
a Gen II. Just drop your glove box (as if you were changing your Cabin
Filter) and you can unplug and jumper the transistor. Fan should run
full speed. If you have terribly high mileage (it's good to mention that
too), it might be the fan motor instead. Sign in and SEARCH at
www.hondasuv.com if you want to access all the threads about heater
troubleshooting. Change your Cabin Filter if you haven't done so lately.

'Curly'

 

Thanks Curly,
I have located the transistor. Can you tell me how I "jumper the
transistor"?There are 4 wires that go to the transistor so when I
unplg it, which wires do I jump across?Hey some interesting info for
you, I took the cabin filter trays out and the filters are gone! I
rang an auto guy who told me that for the Australian market, there are
no filters at all.Yes they have empty trays?Tomorrow, I have arranged
to vist a friend who has a working CRV so I can swap their transistor
to see if that works so I'll keep you all posted.

 

OK I have returned from my friend's place and did a swap of their
transistor and YES it worked so that means that part is faulty. I will
make enquiries about replacements :a)new , b) from auto wreckers and
c)I'll look into actually replacing the transistor inside the unit.
Out of interest, can you still tell me how to "jumper the transistor"
for future tests please?

 

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Since I didn't realize there were four wires and I don't own the manuals
for a Gen II, I wouldn't be much help, sorry.

Same topic: Did you find any evidence that there had ever been any
entrance of water in that part of the heater? The gen 1 is notorious for
wet carpet on the passengers side, which eventually wrecks the
transistor also.

'Curly'

 

I did not see any evidence of water entry BUT my wife says that when
the air blower died, it had just been raining.ALSO, the friend who let
me test their "transistor" says she has had intermittent problems
after rain so maybe I had better look into sealing where ever I am
supposed to .I did read that link you sent about sealing the Gen1 CRV
but have not looked at ours yet.I looked into replacing the actual
transistor inside the Honda device but as yet, have not found a
source for this part in Australia. It is a Toshiba 2SK2313 N channel
FET.

 

I priced the whole replacement part today at the Honda dealer and it
has gone down in price from AU$248 to AU$157 (I'm not sure if that is
with the 10% tax added or before it is added) Australian
dollars ...maybe due to popular demand.? The site in US
http://www.slhondaparts.com/browse.asp?Model=CR%2DV&Year=2002&TrimLevel=5DR+LX+4WD&TransLevel=4ATKA&Section=E&Category=B++1710%7CHEATER+BLOWER&Doors=5&Emissions=KA&PartCatalogId=14S9A0&IRefNo=008&PartNoSelected=79330-S5A-942
Has these parts for US$44.42 or US$14 which seesm a whole lot cheaper
but the US serial number does not seem to match mine.

 

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For the money you save you can afford to try a few 'substitutes' and
have an adventure trying it. I'm with you. Dremmel tool, epoxy, whatever
it takes. Meantime it's too bad you can't find a schematic so you could
hotwire it on FULL so at least you'll have AC without having to drive 60
MPH. :-(

'Curly'

 

With some help I have now worked out that inside the "blower
transistor unit", there is a heat detecting device which ca blow if
the fan does not cool it enough.Once this is blown, the unit stops
completely. I have tested the suspect part and have found them (pack
of 5 for under AU$20 including postage).Once I have the part
installed,I'll repost.The acual transistor is still functioning.

 

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So it's just like the thermal fuse they put in video projectors and some
light fixtures? That should be easy for you to jumper it out while you
wait for the proper part to arrive.

'Curly'

 

I decided that placing a jumper was not a good idea in case there was
an overheating problem.I did manage to locate a replacement thermal
fuse (had to drive to the other side of town and back) of the same
rating and size and have just resoldered the unit and reinstalled
it.All worknig fine now.Just makes me wonder why the thing would have
overheated in the first place???
Anyway, now all the readers know what to do.