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nissan primera p12 heater fan stays on

Printed From: Nissan Primera Owners Club
Category: General Open Forums - NO TRADING!
Forum Name: Nissan Primera Help & Queries
Forum Discription: NON Paying Members Q&A Section
URL: http://www.npoc.co.uk/forum/forum_posts.asp?TID=70029
Printed Date: 29 Mar 2024 at 2:04am


Topic: nissan primera p12 heater fan stays on
Posted By: rustler
Subject: nissan primera p12 heater fan stays on
Date Posted: 07 Jun 2014 at 8:46pm
HI,I AM A NEW MEMBER(JUST BOUGHT AN '02 PRIMERA') AND STILL TRYING TO FIND MY WAY. MY HEATER FAN STAYS ON ALL THE TIME, TRIED PRESSING 'BUTTON 1'TO TURN IT OFF. NO LUCK. ANY ANSWERS,PLEASE???.



Replies:
Posted By: wickydude
Date Posted: 07 Jun 2014 at 9:46pm
Hi and welcome to NPOC!

Sorry if it sounds a bit daft, but: Did you press the temperature dial first?
What did you try exactly?


PS, kind request to not type with caps lock on all the time, it is considered bad form on forums. It seems like shouting.

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Ex: Primera P12 1.9dCi Estate<b


Posted By: rustler
Date Posted: 08 Jun 2014 at 1:00pm
Hi, thanks very much for the reply and advice. Yes I pressed the temperature dial then went into 'climate control', adjusted the settings to suit but when I tried to turn off the fan with button '1' it stayed on. All '1' does is remove the internal temperature from the screen??


Posted By: timeshock!
Date Posted: 08 Jun 2014 at 2:53pm
Hi and welcome to the forumHandshake
 
Have a look here, I would have expect you to have lost use though, does it heat and cool down?

http://www.npoc.co.uk/forum/p12-fan-speed-control-module-diy-repair_topic12795.html" rel="nofollow - http://www.npoc.co.uk/forum/p12-fan-speed-control-module-diy-repair_topic12795.html

If it is that then you should think about replacing the pollen filter which when blocked causes heating of the unit

http://www.npoc.co.uk/forum/nissan-primera-p12-pollen-cabin-filter-change_topic55661.html" rel="nofollow - http://www.npoc.co.uk/forum/nissan-primera-p12-pollen-cabin-filter-change_topic55661.html



Posted By: rustler
Date Posted: 08 Jun 2014 at 4:48pm
Hi, thanks very much for your response. As it turns out I came across this link by chance(I'm new to this kind of site & just feeling my way around) I unsoldered the resistor(thermal fuse) and am waiting for replacement part to solder back on. fingers crossed!! where is the 'pollen filter' located, please?


Posted By: timeshock!
Date Posted: 08 Jun 2014 at 5:30pm
Did the fuse look burnt?
The pollen filter is accessed through the glove compartment

http://www.npoc.co.uk/forum/nissan-primera-p12-pollen-cabin-filter-change_topic55661.html" rel="nofollow - http://www.npoc.co.uk/forum/nissan-primera-p12-pollen-cabin-filter-change_topic55661.html

I recommend you download the free electronic service manual following the link below

http://www.npoc.co.uk/forum/nissan-primera-factory-service-manuals_topic29493.html" rel="nofollow - http://www.npoc.co.uk/forum/nissan-primera-factory-service-manuals_topic29493.html



Posted By: rustler
Date Posted: 08 Jun 2014 at 6:05pm
Cheers mate, will try that now. Great site(NPOC). People so helpful. Thanks a mill.


Posted By: rustler
Date Posted: 08 Jun 2014 at 9:01pm
Hi, back again. took out the pollen filter and cleaned it up for the moment(will replace it tomorrow).you were right. it was full of bits & pieces & loads of dust. Quite possibly caused the 'original problem'. Thanks a mill.


Posted By: rustler
Date Posted: 09 Jun 2014 at 11:22pm
Hi, I have replaced the 'thermal fuse/resistor' in the 'heater blower' in my 2002 Primera but my fan still won't turn off(it comes on straight away even when I turn my key to hear the radio!!). Can anyone help me?? Is it definitely caused by 'the heater blower' or am I on the wrong track altogether?? Any help or suggestions would be greatly appreciated.


Posted By: essNchill
Date Posted: 09 Jun 2014 at 11:56pm
This may seem like a silly thing to say (sorry) but I have a P11 and my girlfriend has a P12 (facelift, so 2004>) and it's taken me around a year now to work out how to fully control the feckin heater side of things her car LOL! To confirm, you have actually switched the settings off from "auto"? You do this by just pressing down on the temp button, in fact the temp button turns loads of things off etc. But if you have it set to auto, as soon as you turn the key, the heater will attempt to do something.

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Posted By: wickydude
Date Posted: 10 Jun 2014 at 8:21am
Could be a different problem, maybe faulty temperature sensor?
In the factory manual there is a diagnostic procedure in the atc section.

Or another daft question: is the front demister button active? Then it will always blow.

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Ex: Primera P12 1.9dCi Estate<b


Posted By: rustler
Date Posted: 10 Jun 2014 at 8:35am
HI, thanks for your response. Very helpful altogether. I can now hear my radio/cd without any fan noise   . Maybe you can help me out again. When I'm driving the car should I operate it on 'manual' or 'auto'? and how do I turn off the fan when I want to? As you have probably guessed by now this is the first time I've had a car with electrics    (my last one was a '98 micra). I've tried turning down the 'manual' mode to zero but the fan is still on? Very grateful for any more help you could give me. Thanks a mill.


Posted By: rustler
Date Posted: 10 Jun 2014 at 8:51am
Hi wickidude, thanks for the response. Don't have the 'users manual' so don't know which button on the control panel it is(will check it on P12 download). Does it light up when turned on?


Posted By: wickydude
Date Posted: 10 Jun 2014 at 9:21am
You can just see the button here: top right, it has a light in the button. Lower is rear( square window icon) upper is front.
http://s1209.photobucket.com/user/wickydude/media/Primera/14ef7de9.jpg.html" rel="nofollow">
Things like this are sometimes difficult to diagnose.
There's always a (small) possibility that a switch is malfunctioning.
Does the 1 button work with radio/cd?

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Ex: Primera P12 1.9dCi Estate<b


Posted By: rustler
Date Posted: 10 Jun 2014 at 10:38am
Hi wickydude, when I press the top switch the a/c light comes on(but no light on the top button itself?)and when I switch off the a/c light the fan seems to continue blowing strongly to the front window.(when I press the rear switch a light comes on in that case) I don't know anything about what button '1' on the radio/cd player should be doing because it doesn't show that it has a function in this case? Thanks a mill for taking time out to help me.


Posted By: wickydude
Date Posted: 10 Jun 2014 at 10:45am
The buttons 1 to 6 are used to select radio presets or cd tracks.
When you press the volume button, the screen changes and shows the 1-6 buttons in the lower half. Then you can press them to select station preset 1.
Similar to pressing the temp button, then the 1-6 buttons operate the fan controls etc.

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Ex: Primera P12 1.9dCi Estate<b


Posted By: wickydude
Date Posted: 10 Jun 2014 at 10:48am
This may be helpful as well:
http://www.npoc.co.uk/forum/p12-face-lift-version-console-screen_topic43431.html" rel="nofollow - http://www.npoc.co.uk/forum/p12-face-lift-version-console-screen_topic43431.html

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Ex: Primera P12 1.9dCi Estate<b


Posted By: rustler
Date Posted: 10 Jun 2014 at 10:50am
Yeah the buttons work the finest in this instance as I have the radio stations set at this stage and the cd player operating as it should be too.


Posted By: wickydude
Date Posted: 10 Jun 2014 at 11:31am
But not when you want to switch the fan off?
At least that excludes a faulty button 1.



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Ex: Primera P12 1.9dCi Estate<b


Posted By: wickydude
Date Posted: 10 Jun 2014 at 1:23pm
Originally posted by rustler rustler wrote:

Hi wickydude, when I press the top switch the a/c light comes on(but no light on the top button itself?)and when I switch off the a/c light the fan seems to continue blowing strongly to the front window.(when I press the rear switch a light comes on in that case) .


There should be a lit coming on on the switch itself, but it seems to work alright, in that it switches on the a/c to help with demisting. Turning the a/c off makes it take longer to clear the window. When you press the demist button again, it should go back to the setting that was active before, i.e auto.
I usually set it at auto, don't have to think about it again.
What it does then is fully auto, it decides where to blow and how hard and how cold. When heat is requested, it blows in at your feet, with a bit to the top. When cold is requested, it blows in your face, dash center openings. This is probably because warm air rises, cold air sinks.
Occasionally when i don't want the wind in my face i switch to bottom or top outlets. The system will still try to maintain the set temperature, although it no longer reads "auto".

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Posted By: wickydude
Date Posted: 10 Jun 2014 at 1:25pm
.... If i were you i'd try the diagnostics mentioned in the service manual that is in the how-to section of the forums.
If it still behaves strangely, a visit ti the dealers might be advisable, as they can diagnose more with their Consult system.

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Ex: Primera P12 1.9dCi Estate<b


Posted By: rustler
Date Posted: 10 Jun 2014 at 2:49pm
Hi once again wickydude, you're so generous with your time and knowledge. Thanks for the forum download as well. Yeah it seems that just about everything seems ok except for the fact that the fan still stays on!! . Do 'you' know if the 'heater blower unit' should control the the turning off of the fan??


Posted By: wickydude
Date Posted: 10 Jun 2014 at 3:29pm
No problem, mate, I hope I can be of help (not much so far ).

The blower motor is controlled by the airconditioner amplifier, as I believe it's called.
That's mounted on the bottom of the blower motor casing.
If you downloaded the service manual, make a cup of tea and read the ATC section (aka Airconditioning section).
If the switches are ok, it could be your car is getting strange readings from the ambient or in-car sensor, but it could also be something else.
The ATC section describes how to get into the self diagnosis function of the aircon system. If a sensor is failing, it should show up in that diagnosis.
That's all I know, I'm afraid. This is one error that I have not seen before on here.

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Ex: Primera P12 1.9dCi Estate<b


Posted By: rustler
Date Posted: 10 Jun 2014 at 4:45pm
Thanks a mill for everything .


Posted By: Electrolyte
Date Posted: 11 Jun 2014 at 1:27am
If the fan is coming on at full speed and can't be reduced using the speed control buttons then chances are the transistor in the module is short circuit.
The transistor can be tested for s/c using an ohm meter.
You could also unplug the module which should then stop the fan.

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If in doubt give it a clout!


Posted By: rustler
Date Posted: 11 Jun 2014 at 7:13am
Hi Electrolyte, thanks very much for your response. The fan is adjustable(up and down) with the speed control buttons. Just wondering if you mean the 'resistor' as I replaced this part and it didn't resolve the problem. Would a good belt of a hammer do instead of a good 'clout'??? .


Posted By: rustler
Date Posted: 15 Jun 2014 at 6:15pm
Hi, I would just like to sincerely thank everyone who responded to my query about my problem with my P12 Primera. Just for the record it turned out to be caused by a faulty 'fan speed control module' which is now replaced.


Posted By: wickydude
Date Posted: 15 Jun 2014 at 6:18pm
Glad you got it fixed!

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Ex: Primera P12 1.9dCi Estate<b


Posted By: gazandsue58
Date Posted: 15 Jun 2014 at 6:18pm
Thank you for getting back with fixed problem, someone might find your repair useful later on.


Posted By: rustler
Date Posted: 15 Jun 2014 at 6:30pm
Thank you, hopefully it might help someone. It was the least I could do after all the help I received.


Posted By: rustler
Date Posted: 17 Jun 2014 at 5:18pm
Cheers wickydude, and thanks a mill for all your help.


Posted By: known84
Date Posted: 13 Feb 2017 at 1:00pm
hey.!
i Have the same problem on my nissan primera p12 from 2002.
you say that you fixed the problem with the fan speed control module, is that another name for the resistor for the blower.
when i translate the controle module to the danish language i only get the resistor. But i could se that you already had changed the resistor, with no luck of fixing the issue.

thank you.


Posted By: timeshock!
Date Posted: 13 Feb 2017 at 8:41pm
hi and welcome to the forumHandshake if your issue is the fan is on full all the time and not controllable then the issue is a broken resister within the fan control unit. Either replace the unit or effect a repair by replacing the resistorThumbs Up


Posted By: thomasplant7@gmail.c
Date Posted: 07 Mar 2018 at 7:36am
I had a nightmare trying to get to the bottom of why my blower was permanently on. All the indications were that it was the blower resistor that needed replacing. Everyone kept telling me that it was behind the glove box WHICH IT IS NOT. In the end after going all around the houses I found it in the drivers footwell plugged into the ducting near the accelerator pedal.
I tried 2 Nissan main dealer's and no one could tell me this simple fact. Also, it is an easy 5 minute job to replace the blower resistor.
Hope this finally helps.


Posted By: ashurstma
Date Posted: 16 Oct 2018 at 10:59am
QR20DE P12.  HEATER BLOWER HAS GON BAT POOP CRAZY.

Firstly i could not turn it off, it just ran for the fun of it, auto/manual/whatever mode/ whatever temperature at full noise even if the speed set on dash to minimum.

NOW... it won't run at all, auto/manual/whatever mode/ whatever temperature, nothing, even if speed set on dash to maximum.

I'm going to get an aliexpress 27761-AV600 module, I've had a lot of success in the past with timing chains and head gasket kits from them so I'll give one a go, NZ$20 inc delivery vs over NZ$150 from dealer.

Thanks for all the info across the forum, has saved me heaps of time and money trying to keep the car on the road.




Posted By: timeshock!
Date Posted: 16 Oct 2018 at 4:52pm
Thumbs Up


Posted By: Neutron
Date Posted: 14 Mar 2021 at 10:16am
Hello! I'm new to this forum, but i have a couple of questions.
1. Why is my primeras interior getting warm only after like 50km of driving?
2. Heater blower stays on all the time, and i cant turn it off or slow it down i have unplugged A/c module, thermal resistor, but it still works at full speed

Any help would be awesome
-Rob


Posted By: imckay
Date Posted: 15 Mar 2021 at 6:58am
Welcome to NPOC Rob,

Have you had the Car long?
Has the Blower worked correctly before?

Have you removed this Part?
https://www.npoc.co.uk/forum/p12-fan-speed-control-module-diy-repair_topic12795.html
It changes the Speed of the Blower.
Common problem is the Thermistor failing. Very occasionally the Transistor goes short and the Fan runs all of the time.

Only getting warm after 50KM sounds like the Engine Thermostat is stuck open.


Posted By: Goffy
Date Posted: 10 Sep 2021 at 9:06pm
I have the same problem as the OP. Blower is on full all the time no matter what the settings are. The only thing I can change is the temperature of the air it is blowing out.

The OP stattes he replaced the "fan speed control module" to fix the problem. Is this the same part that is located near the foot pedals? Its just I have only heard it called "heater blower resistor module". Is it the same part?



Posted By: timeshock!
Date Posted: 11 Sep 2021 at 9:09am
Yes that is the location, and the part, if you read the the first page of the post it has photos of the location, the unit and how to repair it if you do not wish to replace itThumbs Up



Posted By: Goffy
Date Posted: 17 Sep 2021 at 12:01am
Thanks. That worked. I replaced the heater blower resistor module with a cheap one from a well known auction site, and replaced the air/pollen filter too. All in cost me less than £20. Bit fiddly trying to get at the screws with it being located up behind the clutch pedal, but worth it for the money I saved.

Thanks again for the excellent advice and how to guides on this forum.

My Primera is nearly 20 years old but is still the most reliable car I have ever owned. Its never broken down or failed to start. Ever!


Posted By: timeshock!
Date Posted: 17 Sep 2021 at 9:08am
Thumbs Up



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