
Originally Posted by
rick130
Hmm, my Tdi has two fan speeds, as Alan said the first portion just progressively opens the flap in the ventilation box, the last two stops are the fan. Oh, and the fan should work regardless of where the heater is set.
As for the heater, when you look under the bonnet you will see two control cables going to the heater box, the heater one opens a flap that lets the air flow through the heater core, water goes through all the time.
The cable can jam inside the outer, it can pull through the clamp on the lever at the heater box.
None of my controls worked when I bought the beast with less than three years of use.
I had to strip everything and used copious amounts of bike chain lube down the cable (Rock-n-roll, it's a dry lube, that the carrier solvent evaporates after a little while) and I've never had a problem in the last near eight years.
Also check that the seal at the bottom of the core is sealing the core to the box. This can fail and let under bonnet air in all the time.
Bloody uncomfortable in summer dragging all that hot underbonnet air in.
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