The Wacker Neuson Timer Relay Module 12VDC is a genuine OEM electrical control component designed for the HI 770 XHD Indirect Air Heater series. As a direct factory replacement, this module matches the original 12VDC operating specification and drops straight into place — no adaptation needed. Confirmed fitment spans multiple HI 770 XHD configurations, including Arctic Bear XHD, Arctic Bear XHD NS, and standard HI770XHD units across single- and dual-outlet diesel heater builds. When the original module fails, heating cycles become erratic or stop altogether, making a like-for-like OEM replacement the fastest path back to full operation.
Key Features
- Correct 12VDC Operating Spec — Matches the original electrical rating exactly, ensuring the relay switches at the intended voltage without overloading downstream heater components.
- Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, this is the same module installed at the factory — not a generic substitute.
- Direct Plug-In Replacement — Connector and mounting configuration mirror the original, so installation is straightforward with no wiring modifications or bracket adaptations.
- Broad HI 770 XHD Series Coverage — Fits Arctic Bear XHD, Arctic Bear XHD NS, and multiple HI770XHD configurations, covering a wide range of indirect diesel heater builds under a single part number.
- Restores Consistent Heating Cycles — A functioning timer relay module controls ignition and burner sequencing; a failed unit causes intermittent operation or complete shutdown, especially in cold-weather conditions where heater reliability is critical.
- Electrical Safety Compliance — Using the correct OEM-rated relay in a fuel-burning heater system ensures the control circuit operates within its designed parameters, reducing the risk of uncontrolled ignition events.
A timer relay module controls the timed switching sequences within an indirect air heater — managing when the burner ignites, how long it runs, and when the cycle resets. In a diesel indirect heater like the HI 770 XHD, this module is responsible for coordinating the ignition and fuel delivery cycle, so a fault here typically results in a heater that fails to start, cuts out mid-cycle, or runs continuously without shutting off. Replacing a failed module with a genuine OEM unit restores the precise timing the heater's control system was engineered around.
Part Details
| Part Number | 5200011735 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Timer Relay Module 12VDC |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 770 XHD Indirect Air Heater, Diesel, 2x12 | Arctic Bear XHD | 5000620676 |
| HI 770 XHD Indirect Air Heater, Diesel, 1x16 | HI770XHD | 5000620183, 5200003814, 5200004934, 5100049894 |
| HI770XHD Indirect Heater | Arctic Bear XHD NS | 5000620690 |
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.
