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I recently bought a 2004 Disco 2 and for the first week the A/C blew strong and ice cold, then on some forest roads one day the fan stopped working.
I checked the fuse and it was fine so after fiddling with the controls for a bit I just rolled with the windows down until it came back on. It lasted the rest of the day until it gave out right when I got home. Its been out ever since.
The controls come on and I can adjust everything just fine, I can hear the compressor kick on but the fan wont budge. I tried knocking on it to get it started and whatnot. I bench tested the fan and it kicked on fine. I swapped the fan speed resistor with one from another disco and it still didn't work. Nothing seems to work. I live in Texas where its normal for it to reach 105F midday.. Any help would be greatly appreciated.
 

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@parkerclegg. Mate have you set the fan to full blast? It may be a blown resistor, when the fan is set to max it should bypass the resistor and you should get some nice ice cold air again. The resistor is found in the cabin in the foot well of the passengers side (I have a rhd model). It is quite a small box located quite high up toward the center of the panel. It's super easy to change. I had to change one in my truck recently and it's been a treat since. Hope that helps.
 

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Rule out the power and blower relays, both near the fan, C901(power) and C153(blower) in the pic, also check voltage they both must have live on the light green/white wire in the plug and for the blower to work there must be voltage on the white/red wire of C153 and earth on black/red of C901....if no voltage there it's some wiring or contact issue on the feed path from F31 check connection in C0765 pin 1
 

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You won't believe it..... I'm having the same friggin issue as Parkerklegg.
@sierrafery I did everything you mentioned and am getting 12V in all the places I'm supposed to. I have checked the resistor I have checked the fuses. Are there any relays that could affect the vent blower? I have pulled the blower motor and it tests fine. I have now given the blower motor to an aircraft avionics engineer and asked him to test it for me.

I can't see anything wrong with the system thus far..... any ideas.

Parkerclegg did you ever solve the issue?
 

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Check power coming from the fuse panel. They break down and loose power going to certain circuits and the blower is one of those circuits
 

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+1^^^, if you've got 12V with connectors unplugged it's irrelevant, when the blower is connected the 12V drops under it's load cos it's bad contact, usually at the fusebox
 

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If the blower works well with direct feed get hold of a piggiback fuse, remove fuse F7 interior fusebox, put the piggiback instead and splice into the brown/red wire of C431, it appears in the second pic in post nr 3. If this way the blower will work you need another fusebox eventually if you are lucky it's a bad contact in the plug, C0584 - pin 2(brown/red wire)
 

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There is strong live in the cabin too C0028 pin 1(brown wire) no need to bring a wire from the engine bay
 

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Ok, Sierra & Army pulling and reinserting the fuse worked for like a day.

Do I put a pigtail fuse into fuse #7 and splice the pigtail wire into the C0028 pin 1 brown wire
or
splice it into into the brown/red wire of C431 ?

thanks,
sobieski
 

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Ok, Sierra & Army pulling and reinserting the fuse worked for like a day.

Do I put a pigtail fuse into fuse #7 and splice the pigtail wire into the C0028 pin 1 brown wire
or
splice it into into the brown/red wire of C431 ?

thanks,
sobieski
Splice into C0028 -1 with a 30A in line fuse holder like in the pic, put a 30A fuse in it and splice with the other end into C431-2(brown red) and let F7 out

 

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Nice.
REALLY appreciate your (and eryone else's) expertise & experience - for you, especially on the electrical.

Is the C0028 to C431-2 definite or do I need to test the relay's before I snip those wires?

Like I said, babystep Zero.
 

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As long as F7 made tricks i suppose the relays are OK so that bypass should fix things
 

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Did she manually switched the blower to the max speed for test? ,... if the system is on AUTO there can be moments when the blower goes to minimum speed which can be unnoticeable, also the blower's speed goes down when the vehicle's speed exceeds some limits... are you sure there's deffinitely no blower activity? Better read the bower control operation mode from the workshop manual if you haven't already
 

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Yes, she had it on Max.

Read shop manual. Check (it's my pleasure readying every night).

This morning, I went out to "see" for myself: blower worked fine at all speeds.

Could it be the blower motor itself is going out?
My instincts tell me this is very likely; but my instincts are sometimes wrong.

PS. Fery, there is NO Way I would even know how to begin approaching this without your (an some others') input. Your specificity with the connection pics and wire colors, etc. are what empowered me to brave even trying to diagnose and deal with this - Thank you, sir.

I am open to any further diagnostic steps, just in case she tells me - "my ac blower wasn't working again today".

Thanks.
 

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Hook a wired bulb to the blower's connector(C0056) and let in on the console then see if it's still on when the blower stops or not, if the bulb is on and the blower stopped it's the blower if the bulb goes out as well it might be one of the relays or an earth issue on that path...we'll speak then
 
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