The Wacker Neuson Relay is a genuine OEM component designed for the HI 200HD D, HI 300HD D, and HI 400HD D diesel indirect air heaters. Sourced directly through Wacker Neuson's authorized parts network, this relay delivers the correct switching specifications your heater's control circuit depends on. It fits across multiple HI HD D series configurations, including both the standard and diesel-with-tank variants of the HI 200HD D, making it a versatile stocking part for fleet operators and service technicians alike.
Key Features
- Correct Switching Specs: — Genuine OEM construction ensures the relay meets the exact coil voltage and contact rating required by the HI HD D series control system — no guessing on compatibility.
- Direct Drop-In Installation: — Engineered to seat into the existing relay socket of your HI series heater without modification, maintaining the integrity of the control circuit harness.
- Broad HI HD D Series Coverage: — A single part number covers the HI 200HD D, HI 300HD D, and HI 400HD D diesel indirect air heaters, simplifying parts management across multiple units on site.
- Protects Burner Cycle Operation: — A properly functioning relay ensures clean, consistent switching for the burner ignition and fuel delivery sequences — a failed relay can prevent the heater from firing or cause erratic cycling.
- Electrical Safety Assurance: — As a control circuit switching component in a diesel-fueled heating system, using a relay built to OEM specification helps ensure the heater's safety shutoff and ignition sequences operate as intended.
A relay is an electrically operated switch that allows a low-current control signal — such as one from a thermostat or heater control board — to switch a higher-current circuit on or off without direct contact. In a diesel indirect air heater like the HI HD D series, the relay plays a critical role in managing power to the burner motor, fuel solenoid, and ignition components throughout the heat cycle. When a relay fails, it can cause the heater to not start, shut down unexpectedly, or lose control over individual operating stages — leaving crews without heat in demanding cold-weather conditions.
Part Details
| Part Number | 5200002662 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Relay |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 300HD D Indirect Air Heater, Diesel | HI300HDD | 5000620867 |
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
| HI 200HD D Indirect Air Heater | HI200HDD | 5000620916, 5200011878 |
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.
