Hi guys, just wondering if any one has had an issue with the heater. I have a 2012 ampera with 79k on the clock, and it has recently started to just blow cool air when running on electric. When on ice it is ok, and sometimes will blow warm air on electric but after being run on ice. I have checked all fuses and can't find a fault there. I have disconnected 12v battery for reboot, but still only works properly now and then. Anybody had similar?