Hi guys.

So, for the last week I've noticed that my 1.4 MK6 Golf is taking an age to get to temperature on the guage, c.25 minutes and the cabin heaters are basically useless during that time as you'd expect.

I've narrowed it down to the thermostat being stuck open but I'm keen to hear opinions before I stump up for a replacement, as VW have quoted what seems a fairly obscene £536 for parts, labour and VAT (waiting for a quote from my local indy).

I've got my MOT in Saturday which I'll likely push back now.

Edit: being mechanical I can't diagnose it with VCDS but measuring block values are showing coolant temp at around 75c so even with the guage at 90c it's still running colder than I'd like.