starting to think that the digital thermometer has got issues (its new). I have the air con on 19 pumping out very cold air for the last 2 hours, Its night time and my half my tank lights have gone out (just blues on) and the tank has sat at 29.3 basically since I got home at 5:00pm, its now 9:15pm.
Looks like I will be getting a 2nd thermometer as well as a fan this weekend.
Chiller - yeah, trying hard to avoid that expense. Would rather shell out loads to upgrade the heatpump to a fully ducted system with outlets all over the house (and of course close to the tank) .