Honda Accord Cooling Fans Intermittent Problem It's Not Relay

[@katrinabitner6533]

Thank you so much for taking the time to go over this problem. It helped me 100% I appreciate you!

[@rickrogers2649]

The only good thing about a problem that beats you up is that you never forget it. So it won't beat you up again. Good detective work Ramon. Thank you for sharing.

[@kyhomegarage3430]

Thank you my friend. This one got me good.😊😊👍

[@jgeorges3061]

Ramon, AWESOME diagnoses and job well done as always thanks for sharing brother.

[@kyhomegarage3430]

Thank you my friend. This one got me good.😊😊

[@themechanic6117]

Thanks for the video. Gotta love when something kicks your butt 🤣 it's more satisfying when you figure it out

[@kyhomegarage3430]

This one got me good. Guy just picked it up yesterday. I am glad its gone.😂😂

[@handlehouseflamingknights6913]

Very good video. My issue my car gets hot and my fans dont come on all the time. But when i have the AC on they come on and the temp stays normal

[@vusinhpham6433]

My car got same issue :( Can you share the way to fix it?

[@LA_Commander]

So that sounds like an issue with your cooling fan on the right side. The sensor could be messed up. The left side fan is controlled by the A/C unit (That's why it's called the A/C fan).

[@johnaclark1]

Sounds like a classic cracked solder joint. Fans come on as a fail-safe. I'd take the module apart and find the broken solder joint and put it back together. Those cars were notorious for bad solder joints in the hvac panels, too.

[@kyhomegarage3430]

I did take module apart off camera and didn’t see anything wrong with it. In my experience cracked solder joint will cause open circuit. This module has intermittent short to ground and also that provide direct ground to control side of a fan relays and same ground is used as an input to turn relays on.

[@johnaclark1]

@@kyhomegarage3430 I agree, however, often these are built with fail safes to toggle the fans to on. So a problem in a circuit could trigger logic on the board to turn the fans on, rather than just a simple short to ground. Cracked solder joints at surface mount resistors is what goes wrong with the HVAC modules. I've never had one of these out but I'd suspect similar issues. Just food for thought.

[@kyhomegarage3430]

I don’t know but looking at a wiring diagram looks like that only way module can turn relays on is when temp switch closes circuit to provide ground to control side of a relays and module will supply power. That leads me to conclusions that this design doesn’t have fail safe mode. It an old car

[@johnaclark1]

@@kyhomegarage3430 Well, that module is turning it on internally. I suspect it is possibly seeing a circuit problem internally, which you duplicated by squeezing and twisting the module. I'm only suggesting that the problem isn't a direct short internally but another internal circuit defect causing the module to turn on the fans because it doesn't know what's going on. I know failed engine computers will often turn on fans to protect the engine. I don't know if that's the problem or not, just another thing to consider, having seen so many failed solder joints on those vintage Honda's.

[@btubaby9288]

@@johnaclark1 what can make a 97 accord fans work with a/c on but with with no a/c fans don't cycle on

[@eltalibantv8274]

Ima try this 😢 hopefully that’s the problem since I have the same symptoms on my 92 accord

[@jking3892]

Excellent Video!!! Excellent ,, I would have Never figured that out!!! Thanks

[@kyhomegarage3430]

Thank you my friend. This one was very time consuming. 👍

[@eddysevilla9648]

Thank you professor ❤

[@MRHIM-cc7uh]

Hey nice work, what software are you using there????

[@benjaminwilliams3568]

Honda or Accura parts departments did have a replacment module? I kbow theae parts are expensive, but thats a major component why go cheap? Thats just bad financial practice.

[@gabrielrc_]

Great video, where did you found the diagram?

[@wcarpio]

Hi, can you share the air conditioning diagram with me? I have a Honda Accord and I'm having trouble with the ECU output that goes to the air compressor.

[@arthurfricchione8119]

Ramon I’ve miss your videos and homemade test equipment. I wonder if my Hondas are wired.up that way. Will check my wiring schematics. Thanks for the info stay safe and well and enjoy the upcoming holidays Artie 👍

[@kyhomegarage3430]

Thank you my friend. I am having more videos coming. 😊👍

[@arthurfricchione8119]

@@kyhomegarage3430 Ramon happy thanksgiving to you and our family. I’ll be looking out for the videos Artie 👍

[@kyhomegarage3430]

@@arthurfricchione8119 happy thanksgiving my friend.😊

[@arthurfricchione8119]

@@kyhomegarage3430 same to you and your family Ramon. Enjoy and stay safe and well Artie 👍

[@lesbouma9666]

Thanks buddy. I’ll try that. I replaced the fuse box relay, and the temp sensor.

[@kyhomegarage3430]

Good luck 👍👍

[@Imurge]

good job 👍🏾

[@cardiaglexia995]

Very good diag and video.thanks ramon, all good for you.

[@kyhomegarage3430]

Thank you my friend 😊👍

[@WavyVaporizers]

I changed the sensor switch on top of the thermostat and the 2 sensors below the distributor and my cooling fan doesnt come on when u turn on the ac and it's supposed to but never does. I checked my relays and fuses and they're fine. I thought maybe my fan needs to be replaced but I ran alligator clips from the cooling fan directly to the battery and the cooling fan came on with no problem. So my question is why isnt my cooling fan turning on when I turn on the ac???? The fan on the driver side comes on without any problems.

[@tipsreviews7476]

Does the ac clutch come on?

[@WavyVaporizers]

@@tipsreviews7476 the issue for me was my radiator had multiple holes in it which is what the mechanic told me when he did the pressure test on the radiator. I changed my radiator and radiator fan and I haven't had a problem since. If anyone is experiencing the same kinda issues if you fixed everything I mentioned above and all those wires and plugs are fine check your radiator pressure test it.

[@joegood2474]

That was a good one thanks.

[@billziegmond4943]

Nice find my friend. intermittent problems suck.

[@kyhomegarage3430]

Thank you my friend. This one got me good. Guy just picked it up yesterday.😊👍

[@righteous1229]

Helpful!!!!

[@SirSnoqualmie]

Both of my fans kick on when a/c is turned on so I don’t think it’s a relay issue, I just replaced heater fan sensor and switch. To no avail when engine warms cooling fan doesn’t turn on?

[@furkatusa1092]

Hello, I have the same year 1995 Honda Accord ex. Could you please tell me if it's ok when you turned engine off but fan still works for about ten minutes? Thanks in advance for you response, my friend.

[@Angel-my7zw]

I have the same problem with could it be could be the module

[@furkatusa1092]

@@Angel-my7zw thanks bro

[@gabrielark6353]

I have 94 Honda Accord ex and I have probably the same problem, I have heard that the fans stay on til the temperature goes down and then they shut off or it's called a timer switch.

[@eldoradony]

Great detective work!

[@kyhomegarage3430]

Thank you my friend 😊👍

[@Fred-xo3ku]

What is the year of the Honda?

[@5dennisk]

Why Would One Of My Fans , I checked it by jumper wires And it ran , Doesnt Run But The Other One Does when I Turn The Fan Switch On In The Car .. Does This Control The Condenser Fan , Thanks

[@imsuperbaked]

Hope this helps me

[@mikerod-ml4rd]

That’s a life time of leaning

[@neverstoplearning382]

Wow nice find. Regards sir.

[@kyhomegarage3430]

Thank you my friend.😊👍

[@gilfredooquendo9969]

I have the same car but my fans stay running a couple of minutes after I turn off the car is that normal

[@tee_gunna504]

On mines when the fans turn on , you can hear the relay click fast . When I apply ground to the low pressure switch side on ac it stops . What could it be??? Help please

[@cooldude2245]

So both fans should turn on to cool the radiator?

[@kyhomegarage3430]

Yes

[@LA_Commander]

It depends. One is a dedicated cooling fan for the radiator (right side). The other fan is for the air conditioning (left side). Normally, only the right side one should come on and off to cool the engine. But both could come on on a very hot day for additional cooling. Or when the air conditioning is turned on.

[@urbz200]

I'm lost lol 😂😂😂

[@underthetornado]

What?

[@professionalbaddass]

On mine i can unpkug the coolant temp i believe sending unit under the distributor .its the one behind the single pin sensor..i unplug that and raiator fan turns off so i replaced temo unit and it didnt fix it.any ideas