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PLANT

Fan switch interior light replacing?

35 posts in this topic

Hi all,

Well I noticed my fan for aircon\heatiing was playing up, in that it was not responding to "0" fan and staying flat out(5). I have had the cabin filter replaced. Car on and off and all working as should. I understand could be 20 things including the internal thermostat...

Now tonight I noticed the light was not working for the FAN SWITCH....ie. 0,1,2,3,4,5 are not lit up with headlights on the other two are lit up ie. zones and temp.

So is it easy to replace the globe or could it be a fuse for the FAN SWITCH only?

Any directions, diagram, you tube videos?

Probably get my mechanic(volvo specialist) to do it.

Regards 

 

 

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I replaced the ones on my S40 with LEDs.  Nice and bright!  You'll need the long type though.  A member on here sent me some spares that they had, and that's what I used.  They are not like a normal T3 or T4 like found in the headlight switch.  The bulbs in the climate control have a long stalk to them.  They are similar to this, but will require some cutting to make the LED actually fit the hole onto the console from the back of it.

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Also a common thing to have to replace in the S40, is the fan resistor.  Many of owners have had to replace theirs to restore fan functionality to operate properly again.  The bulbs going out might be a coincidence, but maybe not.  Check all fuses first and foremost, then go from there.  Good luck!!

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I spoke to mechanic and he just said light when I mentioned FUSE! (no test via code tester yet?)

I have the fan issue occur at the same time: Does not turn off on 0, Does not go flatout on 5. Seems to function only when the climate button is full HOT or COLD.

Then I go over a bump or restart car later time and all back to normal?

Will the code tester detect anything?

Could it be fuse related for just the light and fan function?

If I have the bulb replaced, will that fix the fan uses?

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The mechanic changing the air cabin filter, could he have stuffed up my fan resistor that is located under the glove box? 

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Well I found today that before turning the car on, if I place the Fan switch in 0 then NO FAN.......but after I switch it on it stays on 5+ for the rest of the drive!

Does this confirm the heat resistor(under the glove box) or a fuse?

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6 hours ago, PLANT said:

Well I found today that before turning the car on, if I place the Fan switch in 0 then NO FAN.......but after I switch it on it stays on 5+ for the rest of the drive!

Does this confirm the heat resistor(under the glove box) or a fuse?

THE FAN RESISTOR IS NO GOOD!!! google it 

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^ this. OE is like $80? Cheap one is like $20? Some people replace just resistor with a 5 ebay remove/resolder.

Mine will do well from 0-1, then if I go 2-4 it's full high or not on at all, it fluctuates. The swap is super easy, pull glove box and in and out. Might as well swap the cabin air filter at the same time.

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As stated my cabin filter was only replace in last 3 weeks....which makes me think it affected the fan resistor.

Over here a $80 US item is like $180AU! Is it that metal pronged thing...that looks like its out of a motherboard CPU......Fan resistor=heat resitor?

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The fan speed issue is caused by the fan motor resistor (earlier S40) or transistor (later models, i think 2001-2004).  It is located under/behind the glove box near the fan motor and easy to replace as a module.  The transistor module is a little pricey.  Back when this place was S40Concepts, I had a How-To write-up on replacing the transistor.  There was also a nice write-up on replacing the transistor on the module for just a few $.  Can't seem to find them anymore.

The light bulb issue is unrelated to the fan speed issue.  

Stan

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The filter replace should not have affected the fan resistor, that's just a coincidence that it went out around the same time.  It's very common in S40's though.  And a standard code reader will not diagnose these, I believe only VIDA DICE would be able to.

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Well the latest is that my left headlight globe went out.

Probably nothing to do with the fan has gone from Flat out to when placed on 5 it ceases to work......1-4 work. Also when placed on HOT or COLD full the fan ceases to work. Other temperatures work? 

Tonight I noted the globe behind the temperature globe has gone out....so now only the out gauge has a light?

So a " VIDA DICE " software test to determine issue?

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On 10/11/2016 at 1:30 PM, sks40 said:

The fan speed issue is caused by the fan motor resistor (earlier S40) or transistor (later models, i think 2001-2004).  It is located under/behind the glove box near the fan motor and easy to replace as a module.  The transistor module is a little pricey.  Back when this place was S40Concepts, I had a How-To write-up on replacing the transistor.  There was also a nice write-up on replacing the transistor on the module for just a few $.  Can't seem to find them anymore.

The light bulb issue is unrelated to the fan speed issue.  

Stan

I think I had a hand in that as well. The problem with the write up is/was that the connection to that TO3 style transistor could not be soldered it needed to be crimped. The ferrule to do that with isn't all that easy to find and the tool to do it with is (Cheap $25 USD expensive $300 USD) difficult to locate.  Additionally there is an IC and a thermal sensor that should be replaced. If you have the tool and the technology, all the better, but it isn't really Sunday Handyman friendly.

 

On 10/9/2016 at 8:33 AM, 33647_1450202331 said:

THE FAN RESISTOR IS NO GOOD!!! google it 

DITTO

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Ahhhh dropped it in for 235K service and the tech with Vida Dice is away with it!

Mechanic calls later in morning and says what's wrong???? seems to be working as it should ahhhhhhhhhhhh

Note to self always show mechanic issue!!!

Reinforced that put on full cold\hot temp and move fan to "0" and fan remains on 5 speed!

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Picked up the car and because he did not have Vid Dice machine....the machine he thought would tell him code .......did not get code to work out the issue.

Replaced the Fan resistor with new, problem remained.

Replaced with second hand, problem remained.

Return my original, problem remained.

Now thinks it is the Aircon\heating unit itself with the issue and needs the Vida Dice machine to determine code issue. (Tech with machine returns in 2 weeks)I

I now have a fan that is on 5x speed constant from being intermittent after mechanic fiddle!

I asked for "1" globe under the fan knob to be replaced and he replaced all 3 globes, under each knob because "the new one had a blue tinge compared to the existing"!

They were $16 each!!!!!!!!!!!!!!!! CHRIST!  and nothing wrong with the other two in place!

 

 

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Thinks it could be control modular for heater\aircon.......they still work as they should, just the Fan running on 5 speed on each dial position.....this morning driving to mechanic the fan was coming on and off.

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Does the Vid Dice machine need to reset the computer if a new resistor is placed on? Just replacing the resistor ,as above, did not fix the continuous fan on high speed?  

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Vid Dice diagnosed it as Fan RELAY switch and he put a secondhand one in for $11!!!!

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Well Fan lasted a month of perfect use!

Back to not stopping on 0 and running at 4 on all other settings......

Back to Vida test it on Thursday....will report back if second hand capacitor or another issue causing problem.

Hoping a reset via Vida may fix issue?

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