2012 Touran fan switch

[PGP]

Hi, Can anyone offer advice on how to sort out a problem with our cabin fan switch.

We have had our Touran since 2012 when I retired, we have done a lot of miles touring in it, and it's been fantastic. We have always had it serviced by the main dealer and had them sort out any niggles. 

As it is getting a bit old we have decided that the main dealer prices are a bit disproportionate to its value now but it has developed a fault which I suspect may be a main dealer job and would like a bit of advice before splashing out for that.

The cabin fan switch is only working on #3 and #4. If the switch is just a direct line to the fan with different resisters for each setting then I assume that the resisters in the #1 and #2 circuit have failed. Simple as that may sound I suspect with the main dealer that will be the complete removal of all the consul and the complete replacement of the heater consul along with a hefty bill. I have checked fuses are OK. I can't see the relay for the fan as that appears to be hidden somewhere behind the console panels but I am assuming that if it works on 3 and 4 its not going to be either of those anyway.

I am fairly competent with a soldering iron and a wood saw but taking cars apart has never been my thing and I have never tried to take a console apart.

So my question is, Is there an easy fix for this? One that doesn't involve taking the cabin apart. Or, is this a job I should be able to get something like Kwik-Fit or a local garage to do.

All the Best

Peter