HELP - WH statesman dual zone climate control, interior fan no work

[Caprice5L]

my mate has a wh statesman which has just had front end damage repaired. its got a dual zone climate control unit.
now, when he turns just the fan on, the fan doesnt come on at all. turn on the auto or air con, nothing comes on. all buttons work and change icons in the display, but theres physically no air blowing out cos the fans arent working.
all fuses seem ok, but i coudnt really find a fuse that said 'dash fan'. i could hear the fan HIGH speed relay clicking under the dash tho. so thats working.
im thinking maybe theres no gas in the air con thus why it isnt turning on??? i know with the units in vt executives for example, you can turn the fan on, but if you push the air con button on, the green light comes on but the air con doesnt turn on, and that means out of gas.
any thoughts? thanks

 

[accentstencil]

The fan fuse (fusible link) will be called Blower. The fan should work regardless of whether the air con gas is low or not. Also check the ventilation fan relay. Other reason could be a faulty fan speed resister or a faulty fan motor.

 

[azzaVT]

If these are the same climate control units as the VT, try turning the fan onto its highest setting... if it works, then your fan speed controller has a fried transistor. This unit is behind the glovebox, to the right. There's a 3 pin and 4 pin variant between early and late, they're not interchangeable. One from a wrecker is about $35, or about $70 new from GMH.

 

[Caprice5L]

i thought blower was supercharger.
wheres the vent fan relay, under dash or in engine bay?
wheres the fan speed resistor and fan motor?

i turned fan to highest speed and still not working, although i can hear the high fan speed relay ticking under the dash. so does this mean resistor is ok?

thanks for your help guys, hopefully my mate and i can figure out how to fix it.

 

[accentstencil]

Both the fan and resister are behind the glove box. Not sure where the vent fan relay is but I did not see one in my engine bay.

 

[Caprice5L]

we had a go at it today. my mate bought a second hand fan which we tried just by unplugging from the original one and into the spare. it still didnt work. i took a pic, is the resistor the white thing with a plug going into it? we'll try one out of my car tomorrow if that works, so we can try to further determine whats at fault. otherwise, where exactly are the fuses i should be checking? as we also replaced some dash globes and fuses today. what a headache...

 

[Caprice5L]

i just went out now to my car and unplugged the white (resistor)???? and it is the same problem as my mates wh. so if the fuses are ok, then this is the fault. but which fuses do i check, before my mate takes the fan motor back in exchange for the resistor?

 

[accentstencil]

The blower fuse.

 

[azzaVT]

Behind the metal rail, at the top right of your picture, next to the barcode sticker, is the fan speed control module (resister, if you must call it this).

 

[azzaVT]

https://forums.justcommodores.com.au/threads/repair-vt-variable-speed-fan-control-unit.51383