Godox AD400Pro Head and Fan Unit Replacement This prepaid repair service replaces the internal head-and-fan assembly in a Godox AD400Pro flash. The head-and-fan unit connects the flash tube assembly to the capacitor board and provides cooling during operation. Important: This service is for the original AD400Pro and its Flashpoint equivalent. Contact us before ordering for an AD400Pro II. This repair is appropriate for: Damage to the internal flash-head or flash-tube connection assembly A failed or damaged cooling fan within the head assembly Physical or electrical damage that has been traced to the head unit A head-and-fan assembly that MoLight has recommended replacing Several different failures can prevent an AD400Pro from firing or cooling properly. If our inspection shows that the head-and-fan assembly is not the cause, we will contact you before performing a different repair. What the repair includes Replacement of the head-and-fan assembly Installation and testing of the flash-tube connection Testing of the cooling fan and normal flash operation A repair report when the work is complete A six-month warranty covering the replaced assembly Return shipping from MoLight to you What to send Send only the main AD400Pro flash unit. Do not send the battery Do not send the reflector, case or unrelated accessories Do not send additional items unless we specifically request them Pack the flash securely and use a shipping service that provides tracking. You are responsible for shipping the flash to MoLight. The shipping charge collected with your repair order covers return shipping to you. How the repair process works Add this repair service to your cart and complete payment. Print your order confirmation showing the six-digit order number. Place the order confirmation inside the package with your flash. Please include a note describing the head or fan problem, when it began and any other information we should know. Ship the flash to the MoLight Repair Center using a shipping service that provides tracking. We will send you an email confirming that your repair has been received. We will inspect the flash, replace the head-and-fan assembly and test its operation. When the repair is complete, we will email your repair report and return the flash to you. Repair turnaround Turnaround begins when your flash arrives at MoLight. Please review the current Repair Queue Status on the main repairs page before ordering. Orders containing multiple flashes may require additional time. We will contact you if we discover a different problem or need additional information. Otherwise, you will hear from us again when the repair is complete. Repair shipping address MoLight Repair 707 W Lexington Parkway DeForest, WI 53532