Technical Blower fan, non A/C

[Acemelon]

As I have the joy of the most basic of Puntos, hopefully this is an easy fix.
My heater blower is misbehaving.
When it works, it works fine. All four settings, hot from hot and ambient for cold.as you would expect.
However sometimes it just doesn’t work at all. Leave it on and it will occasionally burst into life. Sometimes for the entire trip, s9metimes not.
I guess from that I can rule out the fuse.
What is the collective opinion on what this might be?
Thank you.

 

[multipete]

Check the wiring going to the interior fan. The fan is under the glove box in the passenger side. Look up from foot well,you will see the plastic housing,round dish shape,near there will be the resistor wiring socket,4/5 wires on one plug.Grab the wires and move them with the fan turned on,this is usually the fault.If it only works on full speed then it's the resistor its self at fault. The plug could be burnt,tighten the connections or get a loom of Ebay and replace.

 

[Charlieboy13]

As I have the joy of the most basic of Puntos, hopefully this is an easy fix.
My heater blower is misbehaving.
When it works, it works fine. All four settings, hot from hot and ambient for cold.as you would expect.
However sometimes it just doesn’t work at all. Leave it on and it will occasionally burst into life. Sometimes for the entire trip, s9metimes not.
I guess from that I can rule out the fuse.
What is the collective opinion on what this might be?
Thank you.

This used to happen on my old punto - the earth cable had become corroded on the plastic connector where it attaches to the fan.


If you look under the glovebox on passenger side and remove the top piece of carpet, you should be able to see it.

 

[Ziggy122]

Mk2 suffered with a poor connector which meant the fan looses its ground (overheated and melted = open circuit)
Often its try to earth via the sidelight system

The fans on these are pretty reliable
Just the resistor packs are naff....

If you look in the guides section - youll see a guide (fan puts my side lights on ) (words to that effect)

Ziggy

 

[Acemelon]

Thanks for the info.
A good wire wiggle did nothing. Nothing looks charred or corroded. I’ll invest a tenner in a new resistor pack and let you know

 

[s and b]

the switches sometimes went faulty too but you are given warning as they stopped switching but a little oil had them working again
look at the wiring at the fan again as said because the resister pack still allows the fan to work on full when broked

 

[Sverige]

Thanks for your posts in this topic guys - our mk2 188 has developed problems with the blower motor - it doesn't work on settings 1, 2 or 3 but 4 works like a tornado. I'm assuming it's going to be the connector block based on the above, but I'll check the fuse F8 in engine fuse box too.

 

[Sverige]

Ok, fuse is fine. Found the resistor pack, which looks old and knackered. How to test these resistor packs? Well maybe I should just buy a new one anyway. Wifey mcWifeFace reported a burning smell in the cabin a few weeks ago, so I guess that co-incided with the resistor pack burning out.

Are there any tests I should do on the dangling connector to check voltage reaches it? I suppose it should be 12V on each pin in sequence as the fan setting is changed from 1,2,3,4?