Themattylewis

Evening all, With it getting a bit colder over the last couple of days, I’ve been (attempting) to heat the car up a bit. Unfortunately my 2013 A3 2.0tdi seems to have forgotten the difference between hot and cold. I’ve had a search about some of the forums to see if there was a solution, but none are jumping out at me. A fair few people seem to have had this problem but people don’t seem to have posted how they resolved afterwards. hoping someone on here will know what they’re talking about! Things I’ve done so far; checked coolant level, fluid within the guides checked radiator pipes (top being hot, bottom being normal temp) read that it can be caused by a faulty water pump but no issues there by the looks mine doesn’t have the issue some people have where hot air starts to blow when giving it some revs, seems to be pretty constant temp (that being cold air) there is a definitive switch over when switching from cold to warm on the dials, so assuming nothing is wrong there attempted to have a gander at the cabin filter but couldn’t get the second plastic bit off to access, nearly broke my hand and didn’t have any tools on me - surely this won’t be much of an issue though(?) just to note the air con and cold air work perfectly, and it’s recently had a service and my mechanic always clears any fault codes so it can’t be showing on the computer which leads me to think there must be air or a blockage in the system somewhere, the question is where? any help is appreciated! Cheers Matty