The Wacker Neuson Switch Aux Contacts, 2Xno is a genuine OEM component designed for the HI750 and HI900 series mobile indirect fired air heaters. Sourced directly from Wacker Neuson, this part carries the exact specifications required for correct operation in diesel, natural gas, and LP fuel variants across both series, including skid-mounted and surge brake configurations. Whether you're servicing an HI750D, HI750G, HI750GM, HI900D, HI900G, or HI900DGM heater, part number is the verified OEM replacement for your application.
Key Features
- Correct Contact Configuration: — Double normally-open (2Xno) contact arrangement matches the original switching circuit layout exactly, ensuring proper electrical continuity in the control system.
- Genuine OEM Electrical Specification: — Manufactured to Wacker Neuson's rated switching capacity and contact material spec, so voltage drop and contact resistance stay within the heater's design parameters.
- Drop-In Installation: — Matches the original mounting footprint and terminal arrangement, connecting directly into the existing wiring harness without modification to brackets or connectors.
- Broad HI-Series Coverage: — Fits HI750 and HI900 series heaters across diesel, natural gas, LP, and dual-fuel (DGM) configurations, including skid-mounted and cold-weather surge brake models rated to -40°.
- Electrical Safety Assurance: — A failing or worn auxiliary contact can cause false control signals, uncontrolled burner cycling, or heater lockout. Replacing with a genuine OEM contact block restores safe, predictable switching behavior in a combustion heating environment.
An auxiliary contact switch is a secondary switching element mounted alongside a main contactor or relay, used to provide control-circuit feedback signals that confirm the status of the primary switching device. In indirect fired air heaters like the HI750 and HI900 series, this feedback is critical — the control board uses the auxiliary contact signal to verify that the main fuel or blower circuit has actually opened or closed before advancing through the ignition and operating sequence. When the auxiliary contacts wear, corrode, or fail to make consistent contact, the heater's control system may receive incorrect status signals, triggering fault codes, nuisance shutdowns, or preventing the unit from firing at all.
Part Details
| Part Number | 5000192464 |
|---|---|
| Old Part Number | 0192464 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Switch Aux Contacts, 2Xno |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI750 DGM HEATER-INDIRECT | HI750GM | 5000620859, 5000620930 |
| Mobile Indirect Fired Air Heat er, Diesel | HI750D | 5000620856, 5000620923, 5000620924 |
| HI 750GM HD-Mobile Indirect Ai r Heater-Surge, -40 | HI750GMHD | 5000620969 |
| HI750G HEATER-INDIRECT | HI750G | 5000620857, 5000620928, 5000620929 |
| HI900 Heater-DGM,Srg,-40 | HI900DGM | 5200014221, 5200014222, 5200014165, 5200014166 |
| HI 900D Heater-Indirect | HI900D | 5200014158, 5200014159, 5200014160 |
| Skid Indirect Air Heaters Natu ral Gas | HI900G | 5200014161 |
| HI 900G Heater-Indirect,3x16 | HI900 G | 5200014163, 5200014164 |
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.
