heating error on control panel

[laptop@lancerlabels.co.uk]

I have an A10M and I turned it in this morning and tried to set the nozzle temperature to 195Deg.
It showed an error on the control panel saying "Heating Failed" and in the temperature indicator it showed -14 Deg.
I know it was cold this morning but -14 is rediculous.
Now every time I turn the printer on or do a reset the -14 is shown immediately.
Can anyone give me some guidance as to what the problem is.

Thanks in anticipation of it being something simple.

Trevor