The Wacker Neuson Switch is a genuine OEM Switch designed for the HI 400HD D, HI 120, and HI 120HD indirect-fired air heaters. As a direct Wacker Neuson OEM component, the is manufactured to the same specifications as the original part it replaces, ensuring a correct, verified fit across compatible HI-series heater models. Whether you are servicing a job-site HI 120 or a heavy-duty HI 400HD D, this switch installs in place of the original without modification. Confirm your model number before ordering to ensure compatibility.
Key Features
- Genuine OEM Electrical Specification — Sourced directly from Wacker Neuson, this switch meets the exact switching capacity and circuit requirements of the original, so control signals are routed correctly every time.
- Direct Drop-In Replacement — Matches the original mounting footprint and wiring connections on HI-series indirect-fired air heaters, allowing straightforward installation without reworking the harness.
- Broad HI-Series Compatibility — Fits the HI 400HD D, HI 120, and HI 120HD indirect-fired air heaters, covering both standard and heavy-duty configurations within the HI product family.
- Sustained Heating Output — A correctly functioning switch ensures the heater's burner and airflow controls activate and cycle as intended; a faulty switch can cause the unit to fail to ignite, run intermittently, or shut down unexpectedly.
- Electrical Safety Compliance — On fuel-burning heating equipment, an OEM-specified switch carries the correct ratings for the heater's electrical system, reducing the risk of improper switching behavior in a combustion environment.
The switch on an indirect-fired air heater controls the activation and cycling of key heater functions, such as initiating the burner sequence or managing blower operation. It acts as the operator's primary input point to the heater's electrical control circuit, so a worn or failed switch can prevent the unit from starting, cause erratic operation, or cut heat output entirely on a cold-weather site. Replacing a faulty switch with a genuine OEM part like the Wacker Neuson 5000183974 restores correct electrical continuity and keeps the heater responding predictably to operator commands.
Part Details
| Part Number | 5000183974 |
|---|---|
| Old Part Number | 0183974 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Switch |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
| HI 120 | HI120 | 5200019342 |
| HI 120HD | HI120HD | 5200019343 |
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.
