The Wacker Neuson Photo Cell is a genuine OEM component designed for the HI 400HD D and HI 120HD indirect air heaters. As a direct factory-sourced part, the meets the exact electrical specifications required for proper flame detection and burner control in these units. If you're servicing either the HI 400HD D or HI 120HD heater, this is the correct replacement part to restore the unit to full operating condition.
Key Features
- Correct Electrical Output Spec — Sourced directly from Wacker Neuson, this photo cell meets the precise sensitivity and response characteristics required for flame detection in these heaters.
- Drop-In Replacement — Engineered to connect directly into the existing burner control circuit with no adaptation needed to the wiring harness or mounting position.
- Confirmed Fitment — Verified for use with the HI 400HD D Indirect Air Heater and HI 120HD, eliminating guesswork when ordering for these specific machines.
- Restores Burner Ignition Reliability — A functioning photo cell ensures the burner starts cleanly and stays lit; a failed cell causes nuisance lockouts, failed starts, or uncontrolled cycling.
- Combustion Safety Compliance — The photo cell is a safety-critical component in the burner control loop, directly responsible for detecting flame presence and signaling safe operation to the control board.
A photo cell is a light-sensitive sensor mounted in the burner assembly of an indirect air heater. Its job is to detect the presence of a flame during and after ignition — when it sees light from the burner flame, it sends a signal to the control board confirming that combustion is occurring. Without a working photo cell, the heater's control system cannot verify ignition, causing the unit to lock out as a safety measure or fail to start entirely. Replacing a faulty photo cell restores the heater's ability to ignite, hold flame, and deliver consistent heat output.
Part Details
| Part Number | 5000183987 |
|---|---|
| Old Part Number | 0183987 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Photo Cell |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
| 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.
