The Wacker Neuson Photo Cell is a genuine OEM component designed for the HI-series indirect-fired air heaters and HDR-series direct-fired radiant heaters, including the HI 300HD D, HI 110HD D, HI 200D, HI 200HD D, HI 90, HI 90HD, HI 35, HD 50, HDR 155, HDR 115, and HDR 45 models. Sourced directly from Wacker Neuson, this is the same photo cell installed at the factory, ensuring an exact match to the original specification. Choosing the correct OEM photo cell is critical for proper burner ignition control — the wrong part or a failed cell will prevent the heater from firing or cause unreliable operation in demanding jobsite conditions.
Key Features
- OEM Flame-Detection Accuracy — Genuine Wacker Neuson part calibrated to the correct sensitivity and response threshold for HI and HDR series burner assemblies, ensuring the control board receives an accurate flame-present signal.
- Direct Drop-In Replacement — Matches the original mounting position and electrical connector of the factory photo cell, allowing straightforward swap-out during routine service or emergency repair.
- Broad HI and HDR Series Coverage — Fits a wide range of Wacker Neuson diesel indirect-fired air heaters and direct-fired radiant heaters, including HI 35, HI 90, HI 90HD, HI 110HD D, HI 200D, HI 200HD D, HI 300HD D, HD 50, HDR 45, HDR 115, and HDR 155.
- Restores Reliable Burner Cycling — A functioning photo cell confirms flame establishment to the burner control module, enabling consistent heat output across full operating cycles — critical when working in cold-weather or winter construction environments.
- Fuel System Safety Compliance — The photo cell is a safety-critical component in the burner lockout circuit; using the correct OEM part ensures the heater shuts down properly on flame failure, preventing unburned fuel from accumulating.
A photo cell — also called a flame sensor or flame detector — monitors the burner flame inside a diesel heater and sends a signal to the burner control unit to confirm that ignition has occurred. If the control unit does not receive this confirmation within a set time window, it shuts the fuel supply down as a safety precaution, preventing a dangerous unburned-fuel condition. When the photo cell degrades or fails, the heater may lock out immediately after ignition, fail to start entirely, or cycle erratically — all symptoms that point directly to photo cell replacement as the first diagnostic step.
Part Details
| Part Number | 5000186779 |
|---|---|
| Old Part Number | 0186779 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Photo Cell |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 300HD D Indirect Air Heater, Diesel | HI300HDD | 5000620867 |
| HI 110HD D Indirect Air Heater, Diesel | HI110HD D | 5000620864 |
| HI 300D, HEATER-INDIRECT, DIESEL, -20° | HI300D | 5000620866 |
| HI 110D, HEATER-INDIRECT, DIESEL, -20° | HI110D | 5000620915 |
| HI 200 D Indirect Air Heater | HI200D | 5000620865, 5200011877 |
| HI 200HD D Indirect Air Heater | HI200HDD | 5000620916, 5200011878 |
| HDR 155 Direct Fired Radiant Heater | HDR155 | 5200007530 |
| HDR 115 Direct Fired Radiant Heater | HDR115 | 5100018592 |
| HDR 45 | HDR45 | 5200013800 |
| HD 50 | HD50 | 5200019335 |
| HI35 | HI35 | 5200019337 |
| HI 90 | HI90 | 5200019340 |
| HI 90HD | HI90HD | 5200019341 |
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.
