The Wacker Neuson Relay Board is a genuine OEM component designed for the E1250 and HSH380 series hydronic surface heaters. Sourced directly from Wacker Neuson, this relay board meets the exact electrical specifications required for proper heater operation across Standard, Basic, and Premium configurations. It is compatible with multiple fuel variants including LP/NG, Natural Gas/Propane, and Diesel models. Confirmed fitment spans the E1250S, E1250B, E1250P, HSH380S, and HSH380B series — covering both generator and non-generator equipped units.
Key Features
- Genuine OEM Electrical Specification — Manufactured to the exact switching capacity and circuit layout required for E1250 and HSH380 heater control systems, ensuring correct relay actuation and signal response.
- Direct Drop-In Replacement — Matches the original board's mounting footprint and connector positions, allowing straightforward installation without reworking the heater's wiring harness.
- Broad Series Compatibility — Fits E1250S, E1250B, and E1250P models alongside HSH380S and HSH380B units, covering LP/NG, Natural Gas/Propane, and Diesel fuel configurations with and without onboard generators.
- Restores Full Heater Control Function — A faulty relay board can cause erratic cycling, failure to ignite, or complete loss of heater output; replacing it restores proper sequencing of the heating system.
- Electrical Safety Compliance — As a core control component in a fuel-burning heater, using a genuine OEM relay board ensures switching loads and circuit protection remain within the heater's designed operating parameters.
The relay board is the central switching hub in a hydronic surface heater's control circuit. It receives signals from the heater's thermostat and control logic, then activates or deactivates key components — such as the burner, pump, and fans — in the correct sequence. When the relay board degrades or fails, the heater may short-cycle, refuse to start, or lose control of individual outputs entirely, making it one of the first components to diagnose when the unit behaves erratically. Replacing it with a genuine Wacker Neuson 5200017735 Relay Board restores the precise electrical switching behavior the E1250 and HSH380 heaters depend on for safe, consistent operation.
Part Details
| Part Number | 5200017735 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Relay Board |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| E1250S | E1250S | 5200012355, 5200012354 |
| E12540B | E1250B | 5200012353, 5200007613 |
| HSH380s | HSH 380S | 5100054643 |
| E 1250P Hydronic Heater, Premium, Diesel | E1250P | 5200012357, 5200012356 |
| HSH380S-Diesel, with Generator | HSH380S | 5200012371, 5200012370 |
| HSH380B-Diesel, without generator | HSH380B | 5200012359, 5200007614 |
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.
