Can't Heat Extruder Fully

Yesterday I ran a 3-hour print, no problems. Scraped and cleaned the bed and hooked it back up like always. Today I switched on the printer, selected "Unload Filament", and the extruder will not go past 78%. Switched it off and on, unplugged and re-plugged the head connector, problem persists :(

Welcome to the downed M200 club! Mine has been down since June 16th. The team has told me they have sent parts several times, yet I've received nothing. I hope your support issue will be handled better then mine. 

Did you check set screws for the heater cartridge and temp sensor Julia? Just a thought...

Yes, I tightened all the screws. DIdn't actually pull the wires, but I don't think it's an open circuit since it does get to 78%...

julia,

 themocouple may need to be replaced..

julia,

 themocouple may need to be replaced..

buster that sounds about right, that has happened many times to me in the past with "manufacturing extruders".