Technical assistance can be reached via live chat at Monoprice.com Monday through Friday 6am - 6pm PST, via email at tech@monoprice.com, or via phone at 877-271-2592 Monday through Friday 6am - 5pm PST. Warranty: Replacing parts on your 3D printer may result in its warranty being voided. If you are having difficulty and are unsure if your printer is still under warranty or wish to prevent voiding your warrantytech@monoprice.com for assistance. Safety: Always exercise extreme caution when working on any electrical device, including your 3D printer. Ensure that the power plug is removed and the printer has fully cooled down prior to working on the printer. Quality at a fair price: Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices.