MrBrush

Hi, Printer: Ultimaker 2+ Extended (I purchased a 2 Extended with an upgrade kit) Firmware: vers 2.4x I've had this printer since 2016 and have experienced no issues until recently. I only print branded Ultimaker PLA filament. Slice in Cura and just print on defaults. That has worked for almost 7 years ! But... My prints recently began under extruding. No change in printer location or ambient room temperature. I have: 1. Replaced the bowden tube. 2. Replaced the teflon collar. 3. Stripped and cleaned feeder - it was fine as tension was set to light setting anyway. 4. Tried old and brand new filament. Now the nozzle is not hot enough to melt the filament. If I set the nozzle temp to 240 then hold filament against it - nothing. Barely even marks it. Obviously I cannot get filament through the print head. I'm thinking this is likely a temp sensor issue, but don't want to spend any more money without some degree of certainty. Curious if others have similar experience? Thanks!