The Wacker Neuson Control Box is a genuine OEM component designed for the HI 300HD D Indirect Air Heater. As a direct factory replacement, this control box restores proper heater operation and ensures the unit functions exactly as Wacker Neuson intended. If your HI 300HD D is failing to ignite, cycling erratically, or not responding to temperature inputs, this is the part to reach for.
Key Features
- Genuine OEM Electrical Accuracy — Sourced directly from Wacker Neuson, this control box carries the correct switching logic, relay configuration, and output ratings specific to the HI 300HD D — no guesswork on compatibility.
- Direct Drop-In Replacement — Matches the original mounting points and wiring harness connections of the HI 300HD D, allowing straightforward installation without improvised wiring or bracket modifications.
- Confirmed Fitment for HI 300HD D — Verified for the HI 300HD D Indirect Air Heater, diesel configuration, so you can order with confidence knowing this is the correct part for your machine.
- Restores Full Heater Control — A functioning control box governs ignition sequencing, burner modulation, and safety shutoff functions. Replacing a failed unit brings the heater back to full, predictable output.
- Electrical Safety Compliance — On a fuel-burning heater, a properly rated OEM control box ensures ignition timing and safety cutoff circuits operate within designed parameters — critical for safe operation on enclosed or occupied job sites.
The control box is the nerve center of the HI 300HD D indirect air heater, managing ignition sequencing, burner output, and safety shutoff functions from a single housed unit. When it begins to fail, symptoms typically include failed startups, unexpected shutdowns, or erratic temperature control — all of which leave crews without heat when it matters most. Replacing it with a genuine Wacker Neuson 5200021273 restores the full command and safety logic the heater was engineered around.
Part Details
| Part Number | 5200021273 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Control Box |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 300HD D Indirect Air Heater, Diesel | HI300HDD | 5000620867 |
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.
