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Old 11-12-2007   #1
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Ducato (2003) - Fan heater not blowing air

Ducato fan heater in cab has stopped blowing out air.

At first, speed 3 stopped working, now they all don't work. Heater okay though.

I presume it needs a new resistor(?).

Any advice appreciated, such as the resistor's location and how to get to it, etc.

Thanks a lot.
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Last edited by BigBlue; 11-12-2007 at 00:56.
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Old 13-12-2007   #2
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Re: Ducato (2003) - Fan heater not blowing air

Hi
your right it probably is the resistor which is located on the heater assemby near where the Fan motor sticks out from the assembly it is closest to the door pillar just behind the bottom of the dash will probably have to remove the lower dash to get to it .On mine which is RH Drive the actual resistor assembly is brown (secured with 2 x screws ) in contrast to the black of the rest of the heater
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Old 19-12-2007   #3
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Re: Ducato (2003) - Fan heater not blowing air

Still unable to locate and identify the fan heater resistor.

Removed lower portion of dashboard and located the fan heater assembly behind glove compartment. Brown box on top attached with two screw-in bolts turns out to be for the electric windows and central locking.

Much appreciated if someone can help me out a little here. I need to know where the resistor is located, how to get to it, and what it looks like.

Thanks
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Old 19-12-2007   #4
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Re: Ducato (2003) - Fan heater not blowing air

go to dealer & order resistor...they will show you where it is located aswell...or use eper from menu at top of screen

http://eper.fiatforum.com/
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Last edited by T14086; 21-12-2007 at 00:53.
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Old 21-12-2007   #5
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Re: Ducato (2003) - Fan heater not blowing air

p.s. its under the glovebox (look up)

(you can see it but from memory you have to remove front of glovebox to get it out)
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Last edited by T14086; 21-12-2007 at 01:08.
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Old 21-12-2007   #6
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Re: Ducato (2003) - Fan heater not blowing air

Attached is a pic of the Heater/AC assembly in my 2003 model.
The resisitor is located behind & to the right of the green tag attached to the wiring harness as I said it is brown as in the pic & is recessed into the assembly with 2 x screws, the other connection at the bottom of the heater/ AC assembly secured with the single nut is the thermostatic control for the AC system.
If you click on the pic it will open in a separate window for a better view - should not be that hard to find unless yours has a different Heater/AC assembly

Cheers
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Old 21-12-2007   #7
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Re: Ducato (2003) - Fan heater not blowing air

Thanks for going to the trouble of getting a picture, FreeSpirit and trying to help me find this thing.

The whole assembly behind my glovebox is completely different to yours - my van is LHD. Bought from Germany, but possibly manufactured in Slovakia (2003).

I think my Fiat dealer has ordered a resistor like yours. It looks like the line drawing he showed me, kind of oval in shape - but there's certainly nothing like that attached to my heater assembly.

I notice there's a pipe going through your floor. I don't have that either. Isn't that an air conditioning unit?

Thanks again for your time.
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Old 23-12-2007   #8
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Re: Ducato (2003) - Fan heater not blowing air

The pipe through the floor is the drain for the A/C system which is in the heater assembly in one complete unit
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Old 28-12-2007   #9
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Re: Ducato (2003) - Fan heater not blowing air

Update: Checked all fuses. Replaced F55 in B002 under fascia unit which was blown - still nothing. Fan heater resistor located and a new one fitted (Part No. 46723713) but fan still doesn't come on
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Old 28-12-2007   #10
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Re: Ducato (2003) - Fan heater not blowing air

have you got live & earth at motor?
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Old 28-12-2007   #11
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Re: Ducato (2003) - Fan heater not blowing air

No idea - I don't have a multimeter and to be honest I'm not entirely sure what to do with it if I had.

I'll take the motor out and have a fiddle around, failing that I'll try and see what's going on behind the speed control knob.

When the fan was on its way out, I used to hit the dash and it would come on, so it maybe it's a loose connection or something.

I'll invest in a multimeter tomorrow. Thanks.
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Old 28-12-2007   #12
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Re: Ducato (2003) - Fan heater not blowing air

give me 15mins & i'll dig out diagram
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Old 28-12-2007   #13
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Re: Ducato (2003) - Fan heater not blowing air

right you should have a live at the motor (from fuse F55 30amp) therefore the motor is operated from a switched earth from the sresistor pack then switch.

Does fan motor work on speed 3 or 4?
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Old 28-12-2007   #14
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Re: Ducato (2003) - Fan heater not blowing air

No, it doesn't work on any setting. Not sure if there's power going to the motor or not (as I don't have a meter).

I just dropped the motor out of the fan assembly and there was a leaf in there, maybe that was the initial cause of failure(?).

BTW, I've got a Factory manual, so I'm not working blind. Just about to dismantle the centre of the dash to get behind the control knobs now.
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Last edited by BigBlue; 28-12-2007 at 20:38.
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Old 28-12-2007   #15
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Re: Ducato (2003) - Fan heater not blowing air

check the earth aswell which from memory is located underneath one of the fuseboxes (near side) as this can be loose.A test light or multimeter or even a 12v blb with 2 wires soldered to it would be of help if you have one.
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