I can't find a thread that covers my question so here's a new one.
I bought my 2013 4/4 this year and love it (mostly).

Yesterday (mid October) I had a run up to Stafford. I reassured myself that the heater would warm me up soon but 2 hours later felt that something was not quite right. Fiddling with the blower - Off/Slow/Quick - and heater knob - Off/On - made no difference. Then, queuing to get into the show ground, the auxiliary fan kicked in although the outside temperature was barely 10 degrees. And the heater started blowing HOT air. Sadly the change didn't stick around for the return journey.
So what's wrong? The last car I seriously tinkered with was a Morris Minor 40 years so after checking the fuses I've stopped to seek advice.
I'd like to get it sorted as I don't intend to 'winterise' my Mog soon. I'm enjoying it too much.