The Wacker Neuson Fan Thermostat is a genuine OEM component designed for the HI400HD G, HI400HD D, HI120, and HI120HD indirect-fired air heaters. As a factory-sourced replacement, this thermostat matches the original part exactly, ensuring it integrates seamlessly into the heater's fan control circuit without any modification. It is the correct service replacement when the existing fan thermostat has failed or is no longer regulating fan operation accurately. Confirm your machine model before ordering to ensure compatibility with your specific HI-series unit.
Key Features
- Genuine OEM Temperature Accuracy — Calibrated to the precise switching threshold required by Wacker Neuson HI-series heaters, ensuring the fan engages and disengages at the correct temperature points.
- Direct Plug-In Replacement — Matches the original connector type and mounting configuration, so installation follows the same procedure as the factory unit.
- Broad HI-Series Compatibility — Fits the HI400HD G, HI400HD D, HI120, and HI120HD indirect-fired air heaters, covering both standard and heavy-duty variants in the HI line.
- Protects Heat Exchanger and Fan Motor — Correct thermostat operation prevents the fan from running outside its intended temperature window, protecting downstream components from heat stress or premature wear.
- Fuel System and Combustion Safety Relevance — In indirect-fired heaters, proper fan cycling is directly linked to safe combustion airflow management; a failed thermostat can disrupt burner operation and trigger safety shutdowns.
The fan thermostat in an indirect-fired air heater monitors heat exchanger temperature and signals the fan motor to switch on or off at defined temperature thresholds. This cycling keeps combustion airflow balanced, prevents overheating, and ensures warm air is delivered consistently to the output. When the thermostat fails or drifts out of calibration, the fan may run continuously, fail to start, or cause the heater's safety system to shut the unit down — leaving the machine unable to maintain output temperature on the jobsite.
Part Details
| Part Number | 5000183896 |
|---|---|
| Old Part Number | 0183896 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Fan Thermostat |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 400HD G Indirect Air Heater | HI400HD G | 5000620701 |
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
| HI 120 | HI120 | 5200019342 |
| HI 120HD | HI120HD | 5200019343 |
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.
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