Are the solder joints heating up and causing the heatshrink tubing to shrink while the printer is IN USE? Or is this happening during your soldering process, or just due to proximity of the joints...
Type: Posts; User: DaveB
Are the solder joints heating up and causing the heatshrink tubing to shrink while the printer is IN USE? Or is this happening during your soldering process, or just due to proximity of the joints...
Do you have a volt meter?
With the machine off & unplugged, and the heater unplugged from the motherboard, start by measuring the heater element to see if it is still intact. Measure the ohms...