does it blow air when you max out the blower speed,,try a search on the topic

 

I don't get anything blowing out of it. Saw a couple of other posts too. They all had mentioned that they had been able to get air out at full blast, I don't, so I thought that it could be something else.

 

ASSuming you have an EX you will have to get out the voltmeter and trace the circuit out. IF you have an LX the resister pack is most likely blown.
F56 or blower motor relay in under hood relay box, blower motor.

 

I'm having this same exact problem. Front won't do anything, but the back works just fine.

Mine is a 06 Honda Odyssey LX

Any idea where I can get a replacement resister pack?

 

I'll chime in on my experience with the resistor pack on a 2000 LX. My resistor was blown, and the fan WORKED at full speed only. So rather than through money at a possible non-needed part, do the work to trouble shoot the circuit. First with a VOM you can check the resistance of the pack. Mine, which was bad read open, so it was easy for me (don't forget my fan worked at full speed). I would pull the the pack and read the resistance, if that were good then I'd apply 12 volts directly to the blower motor, if it works then you go from there (trouble shoot the circuit). Lots of luck, Russ.

 

On LX the resistor pack is bypassed when on high. Therefore if it does not work on high it is not the resistor pack.
As above check F56 and the blower relay in the under hood fuse panel. Or possibly a bad motor. Get a voltmeter and trace it out.

 

me too

My 06 EX is experiencing the same thing. Anyone find out what it was? Where do I find the blower motor relay on the EX?

 

Front air stopped blowing today in my 2006 Touring. Rear air is blowing, however now its hot air. Able to change temp and fan speed with no problems. Even tried the front defroster with no luck. Suggestions?

 

wpatrick,

Did you figure this out, my touring is doing the exact same thing.

Thanks

 

Same problem on my 2007 Odyssey EX. I don't get cold air at all. The rear control the rear fan but no cold air. Front digital control appear to function but nothing blows or gets cold. Anybody find the problem?

 

DIY- How to Fix, AC power transistor - Honda-Tech. Has procedures to check out the transistor under the dash. I have the same problem and my part checked bad.

 

Honda wanted 112$ for the transistor for the a/c with auto mode. Picked up the thermal cut off form digikey for 60 cents. Just changed it out. Works great. This thermal cut off took a little bit of soldering. I ordered the part shown in this you tube video. The transistor is different in the 07 but the thermal cut off is the same part.

 

Just registered to say thank you for posting this video-- I shorted out the thermal's leads and had the front motor turn on correctly, but to fix it correctly I went to order a new cut-off from digikey (mostly because I don't have any 1 ohm resistors on hand so I may as well order the right part for replacement if I have to pay shipping anyways!).. They are out, 1 month lead time estimated, but I found some in stock elsewhere by searching for the manufacturer part number (EYP-2BN109) instead of the digikey part number. It should be here in a few days. If I don't update after this, assume that it worked!

To add to the discussion: For my 2006 Odyssey EX, there's a retaining clip in place held by a single Phillips screw that was hard to see because of all the thermal grease. In order to rotate the circuit board up in order to pull the old cut-off out and reseat the new one, you'll need to either clip the leads to the old cut-off or melt the solder and pull the leads out. (I didn't see the clip and ended up breaking a lead out of one side of the cutoff, but I could have/may have damaged some other components in doing so!). YMMV!

 

if you short the thermistor as presented in some of the threads, make sure to re-install the entire assembly so the heat sink is seated in the duct. the heat issue is not trivial! without the airflow, you will melt the case, likely destroy the transistor, and may cause fire! I speak from experience!!! this fix works well though!

 

Hi all - apparently this problem has shown up on my 2006 LX. Rear blower works fine but the front does nothing even at full power. I pulled the Resister pack and tested across pins 3-4(opposite side of the button on the connector). I got 1500 ohms so I assume that the resistor is ok. I got power at the 40 amp heater fuse under the hood as well. Does this say that the blower motor itself is bad? I saw a video for the earlier generation Ody and this did not seem too bad other than the location of the part but how much is the part typically? I assume this is a dealer only part?

Any help is appreciated.
Thanks

 

the part you want is the blower motor resistor, and it's ~$120 aftermarket.

 

I watched this video:

Based on it, I tested pins 3 & 4 and the resistor pack checked out. Are you saying that the blower motor resistor could still be bad? Can I just but a part like this to replace it?
Blower Motor Resistor Honda Odyssey 2005 2006 05 06 NEW on eBay!

I had a local repair shop look at it today and they said the blower motor was fine as it ran for them if they bypassed everything. Is there anything else to look at other than the resistor?

Thanks

 

OK - based on another post I pulled the resistor out of the van againg and tested the continuity on the U shaped transistor itself. This is showing nothing. So this points me to replace the resistor module .... Very confusing. I thought the module was bypassed with the blower on max for the LX models?

Is the 1 ohm resistor jumper still considered ok if temporary? I think I can get one of those quickly but the actual replacement from Digikey may take a few days. Is the ebay part too good to be true? I called Advanced Auto and they wanted $150 to order me one.

 

had exactly same problem recently on an 02. turn out to be just that. front blower was bad. not a real expensive fix as it is not an oem part. replaced blower and cabin filter. Recharged with Artic Zone and now get a reading as low as 47. went thru all other possibilities first. do your self a favor. go to a new blower motor and replace it. Less than a 30 min job.

 

Well. A trip to Radio Shack was pointless as they did not have a 1 Ohm resistor. After reading that someone just jumpered the two with a wire, I decided to try a resistor I had at home. I had a 560 ohm 1/2 watt resistor that I soldered on to test and everything is working again. Any negatives to letting my wife drive the van this way? I assume the worst that would happen is that the resistor will get damaged?

I ordered a replacement resistor pack off of Ebay so it should be here in a couple of days but I might go ahead and order the correct part to fix this one the right way.

 

I am having the same issue as reprsented in this thread and could use advice. I bought a new Power Transistor, a Santeck MT1825 listed as being the correct replacement part for the car. I tried the new part and had no luck. I wonder if there are different transistors for different models of vans (EX, EX-L, LX, etc.). I have a 2006 EX-L van.

I had replaced the lights in the control unit and, later in the week, the Blower Motor and AC stopped working. I pulled the blower motor and applied power from the battery. That checked out. I tested the 40A fuse (#21) and that checked out. I tested the old and new power transistor, across pins 3 & 4, and they checked out. Used a multimeter for the electrical tests.

I hooked up the old power transistor and blower motor and turned the van on (with the blower motor out of the HVAC. I could see the motor tried to start for a moment then stopped.

Let me know if you have any ideas. I am stumped at this point.

 

AM
mmitsch, I've got the exact same problem as you. I installed and new transistor after testing my blower motor. Everything checks out and should be working. The fuses have power, the resister has been changed, the motor works when given power. What's next?
I also have an 2006 EX-L. Did you figure anything out?

 

What year is this assembly from and here in the car I it located? I have an 04 Odyssey that looks like this will fix at least part of the A/C problem. Will have to check the Freon charge next.
thanks,

 

Blower resistor/transistor

I have a 2005 Odyssey EX the front blower stopped working in all speeds including max. The rear fan control works in all speeds but the A/C quit working in the rear. After much checking of all fuses,relays,blower motor,and reading here about this problem I ordered a new blower transistor/ resistor from Autozone. They show 1 for $100 and another $40.
Honda is about $160-170. My friends at Autozone ordered both in for me. The next day they came in and we compared both. The look exactly the same. I bought the one for $40 and now everything works again!!!!
this transistor is monitored by the cars computer and when it see's that the blower is not working it shuts off the A/C.
Not sure why they couldn't just let it run when rear air is requested. Just imagine being on vacation in Florida and no more air. If the rear works, you could survive during the day. However the engineers set it up this way!

my advice, buy the cheap one from Autozone and install it yourself! I am a master ASE mechanic with 20 certificates and can assure you, you can change this yourself with very limited skills. It's under the dash on the passenger side.
If you have the same symptoms ( No blower up front at all including max and no A/C at all ) plus the A/C did work before and rear fan control still works
Dont pay Honda $90-110 to diagnosis it for you, unless spending $300-? Is not a problem for you?
if the $40 part fixes it, then go buy the Honda part, if you are good with soldering iron like these other great post, follow them.
I ordered a spare $40 part and keep it under drivers seat!
i made it 1000 miles to Clearwater beach with no problems!
hope this helps!

 

The $40 one from AutoZone works great. I just installed it in my 2006 EX, and everything is back to normal.

The main difference, by the way, between the $40 and $125 versions is the warranty. 1-year vs. Lifetime. Internal construction for each is unknown. There may be differences.

Original symptoms:

After starting vehicle with A/C off, pressing AUTO (on a 95-degree day with it set to 68) resulted in the auto and recirculate lights illuminating for a few seconds. Then the recirculate light would go out. No air would blow up front, no matter what I tried (all fan speeds). Rear blower worked fine, except no cool air because the A/C had been shut down by the front controls.

The above sequence could not be repeated unless vehicle was restarted.

 

I too have the same problem in my 09 EX-L, except it happens intermittently and when it does, I just reach under the dash and give it a good slap and the blower comes back on. Could this be the same problem as everyone else, or maybe just the blower motor?

 

my fix

vehicle is a 2000 Ody ex w/navi
when hitting the ac auto button, no air was blowing through the vents. regardless of the degree selected.
tried manually turning the ac on through the navi, selecting all the different fan settings. still no air blowing through the vents.
check through the forums here. some stated to replace the ac transistor/resistor next to the passenger foot panel.
ordered the part. replaced it. tried turning on the ac, still no air blowing through the vents.
check forum again, found a post indicating to replace blower motor that sits next to the ac transistor/resistor.
ordered part. replaced it. now my ac works, air blowing through the vents.
hopefully this could help other owners with the same problem.
parts ordered from ebay.
$20 for the transistor/resistor
$40 for the blower motor