Is the welder plugged in? Make sure the ground clamp is attached to your work piece and as close as possible to the torch. Plug the welder into a dedicated 20-amp circuit. Check circuits to see if a breaker is tripped. Pull the trigger on the torch and touch it to the ground clamp. If the welder is a cold torch welder, you should see an arc when you pull the trigger. Call 1-800-746-5641 for additional technical assistance if needed.