Hi Dave,
I’ve taken a look and when removed the inner covers, the fan ran smoothly so can eliminate the motor or warped fan.
if ice then this had melted, but I did notice that the polystyrene insulation was swollen and damaged slightly. When I pressed the polystyrene water came out so could this be the problem if frozen? I have photos but can’t upload – do you have alternative way of sending to you? and if this is the problem then can new polystyrene panel be bought?
thanks
Paul.