The heater in my 156 had become very poor and the auto windcreen clear had stopped working. Also when the fans were on it was kind of blowing in 'pulses', rather than a steady stream.
So, after reading up on the problem I ordered second hand heater control unit from a breaker and fitted it this afternoon.
Fitting was successful and everything works. However, I cannot get the rubber dial control rings to fit back on properly. They cannot quite seem to get enough purchase to click into place. This makes them stiff to operate, whilst if I push the 'recirc' or heated rear screen buttons, they get stuck.
I have taken everything out again, ensured the heater control unit is as flush as possible (it is) and refitted all the dash trim a second time, but still no better.
Can anyone offer any advice or help please? I am so close, but yet so far!
Doh - typo in title line, sorry