Discovery 3 Fuseable Link for Aircon/Vents

Good Evening All,

I have a bit if a head scratcher for this one in that coming home the other day, the vent (AirCon was off) just stopped blowing but all remained lit on the controls, a few seconds later a slight smell of burning could be smelt. Turned off the vents and the smell stopped and all was good, though never would work again until I found the culprit, a blown Fuseable link.


As soon as this was replaced life to the vents worked, but of course this did not find the problem what caused it to blow in the first place. Just by chance I left the new fuseable link in, and with normal use after a couple of months it went again, but with no smell this time.

Done some internet searching but not seen any common issues such as this. I have since removed the vent controls (while doing the radio button fix), looked and smelt around and all appears normal. Just wondering if anyone can think of what to check next, was thinking the motor fan itself.

Many thanks

Hi

personally would find the wiring diagram that fuse belongs to and see what things are on that circuit

indeed the motor may be at fault but at least tracing wiring and what’s connected should help u narrow it down

hopefully that helps

Haynes manual is showing mostly devices and parts that are related to the ventilation from what I can see.

Hi. Maybe if you say exactly what modell of Discovery is involved(year, engine) and which particular fusible link, (number/position/rating). If i post you a picture of a D2 fusible link woud you be able to guess which one it is just based on it's shape and colour?

It's a 2004 Discovery 3 2.7 Diesel Automatic HSE.

Attached is a picture (from google) fuseable link that is for the ventilation is circled in red, if that helps.

FL12 (40A) has nothing else connected to it, only the blower motor so if it keeps blowing unplug the motor and if it will blow that way too there is a short on the wiring or within the fusebox, if it doesnt blow with the motor unplugged then replace it cos it has a short in the winding

Many thanks, I will give that ago, rather replace the motor than the controls that's for sure.

I will update when I have the answer, and when it stops raining lol