Citroen C3 '05 Blower Location & Troubleshooting Without Airflow

Question

Hello ! The car blower found the perfect time to give up the ghost... Citroen version with automatic air conditioning, i.e. button control, display. All other functions work, the air conditioning turns on, but... there is no blowing ;-) The fuse responsible for the blower is operational. Behind...

carrot · Accepted Answer

This is the speed regulator The thick cables in one plug are the power supply, the other is the motor, short them in pairs to see if the blower will start

Anonymous · Accepted Answer

In the heating block, above the driver`s legs.

Strumien swiadomosci swia · Accepted Answer

IRFP064 ....................+ silicone paste.

elele · Answer

I don`t know this model, but it seems to me that you are looking in the wrong place. In mine, the air conditioning blower is located under the hood, not in the cabin. There are only outlets in the cabin.

Kuniarz · Answer

Under the hood there is a cabin filter, behind it there is a hole and a tunnel leading air to this block...

Kuniarz · Answer

So, based on a photo from the Internet, by powering the blower directly, I will diagnose whether the problem is in the regulator or in the blower itself.
Looking ahead - where is the blower physically located and how to remove it?

Kuniarz · Answer

Thank you for the tips, the speed controller is actually the culprit of the confusion.
For now, to survive the heat, I added a blower switch - according to the principle "the noise from the fan is better than the noise from the heat in the cabin..." ;-)

The regulator looks like a PWM one, but it doesn`t seem to be burnt, so should I replace the mosfet with a stick? I haven`t taken it apart yet - what`s the best way to replace it?

elele · Answer

Maybe it would be worth finding and removing the cause before replacing it, so that it wouldn`t turn out that after turning on the blower you would end up in the same place, only a few zlotys poorer and a few hours of work poorer? Transistors generally don`t just fail without a reason. Most often, these are broken blower bearings and a dirty filter that blocks the air flow.

Kuniarz · Answer

...maybe it`s simply age-related damage, after all, I`ve already been working for 10 years.
I was driving to work today with the blower at full speed (I added a switch) and generally the noise is bothersome...

elele · Answer

When it comes to semiconductors, there is no such thing as age wear. These are not lamps that lost emission. As a preventive measure, I suggest replacing all electrolytic capacitors. The cost is negligible, but they get old and in most cases start to get dirty.

Kuniarz · Answer

Buddy, I appreciate the efforts, but I`m afraid you don`t know what this regulator looks like. There are NO electrolytes or art there

I am asking for specific information about the MOSFET located there, I am willing to take the financial risk

Replacement takes 10 minutes, installation in the car another 10 minutes.

Kuniarz · Answer

Mosfet replaced, regulator and blower work like new.
At first, I connected it "shortly", i.e. without putting the regulator in its place, and after a few minutes the radiator burned.
However, I think this is a normal symptom, after all, the blower is quite powerful, the radiator is large and placed in the ventilation duct for a reason.
After the repair, the car drove to the seaside and back, nothing burned.
I consider this topic closed, thank you for your tips.

T5 · Answer

At the author`s request, I am reopening it.

Kuniarz · Answer

...the problem is back, I`m afraid that this high radiator temperature is not entirely normal. When I use the blower at higher speeds, it turned off after a while, and today... it died again. I suspect that the mosfet has failed, it`s not easy, replacing it is not complicated. However, I need to take a closer look at the blower itself - the question is HOW TO REMOVE IT? From what I can see, it is located quite at the back of this whole block, at the top, near the bulkhead wall. Access was difficult, I could barely put my hand in there... How to get there? Do you need to dismantle the center console? HELP !

Strumien swiadomosci swia · Answer

It`s normal for the radiator to burn. See how it burned. Measure how much current the fan draws.

elele · Answer

No buddy, this is not normal. Then they placed it in the air flow from the blower to cool it. It may be warm, but not hot. Since nothing happens without a reason (it worked for several or even a dozen years and now it is damaged again in a short time), I assume what I wrote at the very beginning. Clogged filter or broken blower bearings. The fact that it may rotate slightly when you turn it by hand does not mean anything. See what happens to the rotor when you apply voltage to it. It will position itself at an angle to the stator instead of maintaining a parallel position. The previous repair was to remove the effect instead of the cause, and you first need to find the cause, otherwise it can be repaired endlessly.

Strumien swiadomosci swia · Answer

Elele, as I see, you have no idea.
The radiator gives off a lot of heat if it can, it is warmest at medium speeds.
Once the engine does, it covers the commutator with carbon dust and draws more current.

Kuniarz · Answer

Don`t worry, gentlemen, I`ll measure the current in a few days, because I`ve been having a total headache lately...

elele · Answer

Buddy Kuniarz. What is the fuse value on the blower? Is it original or stronger because it burns out? Doesn`t it make you think that the fuse doesn`t blow and the transistor, which has a much higher maximum current, fails?

Kuniarz · Answer

The fuse is original, probably 30A
I`m not arguing that the blower itself doesn`t need to be looked at. Therefore, my main question was "how to remove it".

My friend "elele", I don`t like the tone of your statements, think about it...

Anonymous · Answer

Unscrew the three screws and remove. As far as I remember, the steering column needs to be removed.

Citroen C3 '05 Blower Location & Troubleshooting Without Airflow

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