As of yesterday evening i noticed that my units fan seemed to be running more often than before. This morning when running the geyser (about 3.5kW) i noticed that the red temperature LED came on after a few minutes. It has never done this before and i never had any issues heating the geyser with this unit before.
As soon as i switch off the load (or pretty soon afterwards) the warning LED goes off again. The fan is running hard when it does this but unit does not feel 'hot' to the touch although the air coming out of the unit seems a little warmer. Ambient temperature is about 20 degrees. Nothing that the unit hasnt seen before.
All signs point to some sort of overheating, i think. Would there be anything i can do/check myself or do i need to get the installer involved? Any suggestions?