Abnormal temperature A30T

[blindwilky]

Hi,

Anybody had any issue changing over the nozzle printing head ?
I decided to buy a new One due to one of the filaments blocked, also good to have a spare. Arrived perfect no damage, changed it over as per video Geeetech had added to the website. Loaded up last night thought all was going until I got a message ( see picture below ). It gets to around 152c then the message appears. Any ideas welcome