(T) Heater blower only working on setting 4.

As title, anybody have any ideas please?
Setting 1,2,3, no longer work,

It may be that your fan bearings require cleaning/lubrication. Its possible that only setting 4 gives enough power to make fan actually turn.

There was a recent thread with similar issue on this forum.

Another possibility is the heater resistor pack has failed (which will likely be by-passed on position 4)....

Chris

I'd say it was the resistor. Resistor failed and was replaced so many times on my old Polo. Strangely it's gone again, so another trip to the scrappy required.

if its like a punto,then resistor gone. my resistor went and i got a new one direct from fiat for £12

I bypassed the resistor altogether on an old M reg Punto just out of curiousity - it was obviously burnt out - and the fan resumed working properly on all speeds, so how did that work?

Thanks for the help, where do i find the resistor pack??

Thanks for help so far, but can anyone point me in the direction of where the resistor block is?

Thanks.

Ooooops!

Sorry for double post above, too much beer last night .

Cant remember posting first time!

Is this the resistor pack ? Thanks in advance.

Almost identical to the M reg Punto. The little resistor on the end was the bit burnt out on that - I relaced it with a bit of fuse wire.

I will have a closer look.

Thanks.

The little component that sits on the top of the green block is a 'thermal fuse' rather than another resistor. If the whole green unit gets too hot, this 'fuse' fails (by melting inside)... which is why, Trimdoner, it worked on all speeds once you'd bypassed it. However, note that 'next time' you have no thermal overload protection so something else will burn instead!

Pete

At least I know now not to do it on my own car

It was a couple of years ago on an old Punto my daughter bought - it's long since gone, scrapped after failing its MOT on too many things. Luckily it didn't catch fire before it went!

Do you know the temperature for that thermal fuse on Punto (MK2)? Is it 216 degrees or some other (maybe part number if you have it)?

Thanks in advance

You will probably have the temperature printed on the body, but it will be hard to read if it has 'burnt'. Try cleaning it with water first, followed by a very light abrasive eg toothpaste. You should then be able to read it!

Spares can be had from Maplin
http://www.maplin.co.uk/Module.aspx?ModuleNo=470
at the princely sum of 79p !

However you will have to fit the new one without overheating by soldering. If you can leave enough of the old legs use connectors from a a 1A chocalate block.

IIRC in my Picasso the old one was 144degC and I replaced with 152 degC. But in that car the resister pack is in the airflow of the fan so ifor yours it maybe a higher/lower value .