Fan speed switch problem

Malta1

Hi Folks

Looking for a little bit of advice

The selector switch on the cab air fan works fine on setting 1 & 2 but has stopped working on setting 3 & 4

The question that I have is

Does the fan have 2 separate fuses (ie 1 for lower speed settings and 1 for higher), is it a faulty switch or just a loose connection

The van is a 2003 Fiat Ducato

Cheers

zoltar_boi

I had a similar problem on a 2000 Ducato. I was advised that there is a controller in a heating duct that can go, and nothing to do with fuses. I got a new second hand unit from a van breakers for about 20 and fitted it myself.

Pm me if you want more info. If you give me a number in it i'll call you to tell you where it is.

Malta1

PM just sent

Buford T Justice

Generally the resistor pack in the motor is the culprit. Common on cars too.

Aidan_M_M

when the rheostat fails on a Ducato (95-02) , it'll still work on full speed , and not on any other speed. It's easy change , 2 screws and a plug . sometimes you've to drop off a section of the lower dash , that's quite easy.

Malta1

OK.....fan back working

Had a look at the fan unit and wiggled the wire connection into the unit.....the fan now works on all settings

Root Cause: Wifes big feet?? (now ya dont have to tell her that I said that )

Cheers for all the replies

Buford T Justice

Malta1 wrote: »

OK.....fan back working

Had a look at the fan unit and wiggled the wire connection into the unit.....the fan now works on all settings

Root Cause: Wifes big feet?? (now ya dont have to tell her that I said that )

Cheers for all the replies

We won't, but we can't promise she won't read this thread tho....

Malta1

Right....have to resurect this one
Had the van out for a drive a couple of weeks back and had the fan turned up to max for a while before we departed (probably 15 mins). When driving I then realised that the fan had stopped working all together

Pulled the fan out when got home and confirmed that all is OK with fan.....ran direct off 12V for a couple of seconds

Then pulled the "resistor pack" out.....OMG I have never seen anything so rusted

Bought a new resistor pack from e-bay (same model number) but it defintely is different (original resistor had 4 "prongs" into the resistor pack body....the new one has 4 also but the middle 2 look like they are connected outside the resistor pack)
Anyway, fitted the new pack and the fan runs fine on setting 2 but not a kick out of it on any other setting. Also noticed that the resistor pack became very hot very quickly

So the question
1) Have I just got the wrong resistor or have I got a switch problem?
2) Should the resistor pack get hot (too hot to handle)

Cheers

Aidan_M_M

Did you run the fan with the Rheostat out? If so it's probably fried . It is kept cool by the fan blowing air past it .

moodrater

As aidan says it relies on the air flow to cool it, some resistor packs have a soldered spring that pops open when they overheat you can solder it back together.

Malta1

Cheers folks

Trying to source another one and will have another go