Air conditioning and blowers not working, fuse blows immediatley after changing. there was a clicking noise heard before fuse blew. No display on dash unit. (2000 passat 1.9TDi Sport)

Have you checked the blower fuse?

did you check the fuses ? relays? does it blow any air at all? could be blower went bad and blew fuse, or a relay failed, check fuses first.

fuses that look bad are, fuse that look (appear) can in fact be bad
hair line cracks form ,when over current conditions happen.
we use an ohm meter, we take our $20 DMM and select ohms low.
0 ohms is a good fuse, and infinity is 100% bad.
the blower is dead, no blow , no heat.
so find out why the blower is silent (fuse)
or if blower blows (heard) and it dont exit the port of desire.
that means the mode control motors (actuators are malfing)
check fuses 1 more time some cars have up to 3 fuses for heat and blowers and actuators.

if electrics is your bag>?
then login to alldata.com and see the actual schematic
with this and a volt meter, you can find out who is dead.
and why./
the FSM covers this 100x better, than any online source.
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YMMV

Sounds like the gear to adjust the flaps is broken or misaligned. May have to disassemble dash to discover problem.

see this steps and fix it. God bless you

Start the car and turn the air conditioning on. Allow the engine to run a few minutes so the air can cool. Check to make sure you have the proper buttons selected. This simple step may uncover the root of the problem.

2 Adjust the air controls on the dashboard to see how they are working. If the controls move the way they should with the proper amount of resistance and stopping in the right places but have effect on the air, then the problem may as simple as a blown fuse. If the controls are not working at all, then the problem is in the control panel.

3 Get to the fuse box in a Ford Explorer by removing the instrument panel to the left and slightly below the steering wheel. There is a fuse remover provided in the fuse box. A blown fuse will have a broken wire in it. In a Ford Explorer, this fuse is red number 10.

4 Find the control panel by prying off the top instrument panel around the air conditioning temperature controls. Unscrew four screws, one in each corner, and remove the temperature control panel. Unplug four electrical connectors and one vacuum hose to the control panel.

5 Listen for the blower motor to be properly working while the engine is running and the air conditioning controls are turned to high. Adjust them from low to high to make sure the blower motor noise increases and decrease accordingly.

check the fuse
if it's good then your blower motor is bad

You blew a A/c hose you should see some oil were it blew at,I hope this helps you and thank you

Check blower motor fuse. If blown replace. Be aware. If fuse again blows or you find fuse to be in good condition it indicates a problem in blower circut/components. Do NOT replace with larger fuse to cover problem it will cause further damage. $$$
good luck

I may have had a similar problem, for a long time my blower motor made a loud howling/roaring noise, hard to explain, but I only heard the noise when the blower was turned on. It continued to blow air for a couple years then just quit, the noise it made continued for another 6 months to a year without air-flow. Finally it quit blowing air at all. I eventually replaced the blower motor and no more noise and air flow was restored. Hopefully you already have fixed this because removing and replacing the blower motor wasn't fun.

One suggestion. Have you checked the fuses ?

I would check the AC or blower fuse to start with. If you have the drivers manual it will show you where the fuse box is. Typically there are at least two boxes to check. One in the Engine compartment and one in the passenger cabin.

Look inside the lid of the fuse box to see which fuse may apply to the AC circuits or the blower and check to see if they are blow. the metal link between the two posts that plug in. If the link is missing you need to replace the fuse with one of the same rating. Make sure you know where you took the fuse out from and put it back in the same slot if its good. Check all the main fuses if possible to see if any have blown and replace if they have.