TOPIC:

Hi all.  Has anyone had any issues with the temperature of the heating system? Strangely, the air temp only gets HOT when the heating is turned up to Hi, turn it back one click to 26.5 and it seems to reduce drastically to mildly warm, definitely not by half a degree.  Welcome thoughts before I head back to the dealer.

Only when the ECO is on I tent to have issues, but not as you describe. 
I've a diesel 1.5 and after it get warm enough I've no problem with the temp. Always on 22 

Same here, have 1.6 d Ci
@Houston... what result do you get on manual controled climat system when turn heatingbto full or to middle? Same... you can not expect that set on 21 will blow hot air all the time. It will on start and when reach 21 in cabin it will blow just enough warm to keep that temperature. If you feel cold put on max and overiride automatic control of temperature... (as you already did)

I only use mine in Automatic, I don't use Eco Mode, as that does have some bearing on the performance of the heating system. Don't have any issues.

I have 1.5 dCi and temp allways on 21 degrees. No problem even when -15 outside.

Tested this last year with a digital thermometer wedged into the heater outlet. ECO reduces both heat and AC performance. One bar change to the fan speed gives a change in outlet temp, didn't test internal car temp compared to set temp.

I always find it strange that cars today still don't have internal temp indication