The Wacker Neuson 5200021278 Fan is a genuine OEM component designed for the HI 400HD D and HI 400HD G Indirect Air Heaters. As a factory-sourced part, it meets the exact specifications required for correct airflow volume and heat distribution in these units. Whether you are performing scheduled maintenance or replacing a damaged fan, this part ensures the heater operates as originally engineered. Confirm your model number before ordering to ensure a correct match.
Key Features
- Genuine OEM Airflow Specification — Manufactured to the exact blade geometry and rotation speed required for rated heat output on the HI 400HD series, ensuring the burner receives the correct combustion air volume.
- Direct-Fit Replacement — Engineered to mount directly onto the existing fan hub and drive shaft of the HI 400HD D and HI 400HD G without modification to surrounding components.
- Fits HI 400HD Series Heaters — Compatible with both the HI 400HD D and HI 400HD G Indirect Air Heater configurations, covering the primary variants in the HI 400HD product line.
- Sustained Heat Output — A properly functioning fan maintains the combustion and heat-exchange airflow that keeps the unit delivering consistent BTU output; a worn or damaged fan causes uneven heating or heater shutdown.
- Combustion Safety Performance — Correct fan operation is critical to safe fuel combustion — an under-performing fan disrupts the air-to-fuel ratio, which can trigger safety lockouts or incomplete combustion in indirect heater applications.
The fan in an indirect-fired air heater serves two essential roles: it draws combustion air into the burner assembly and pushes heated air through the heat exchanger and out into the work area. Without adequate airflow, the burner cannot sustain proper combustion, and the heat exchanger cannot transfer warmth efficiently to the output airstream. A damaged or worn fan typically presents as reduced heat output, frequent safety shutdowns, or unusual noise from the heater unit — all signs that the fan should be inspected and replaced promptly.
Part Details
| Part Number | 5200021278 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Fan |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
| HI 400HD G Indirect Air Heater | HI400HD G | 5000620701 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
