Question for anyone well versed in the micropipette puller universe. My Sutter Instrument Model P-1000 Flaming/Brown Micropipette Puller out of no where indicates an error upon startup. It says "A Heat FET is not working." Once I run a heater testing, It indicates "there is a circuit fault. FET readings." The FET A is 219, while FET B is 0.What do I do to troubleshoot this issue?
P.S. I've already replaced the filament, thinking that may help and it didn't, but there is a brand new filament in there.