Thetford Fridge Control Board & Eyebrow Panel Faults – N-Series Replacement Guide N-Series fridge faults, control board and eyebrow panel part numbers, error codes, and replacement options. Troubleshoot N3080, N3090, N3100, N3145, and other models.
1. Introduction
Thetford N-Series absorption fridges are widely used in European caravans and motorhomes. Over time, control boards and eyebrow panels may fail, leading to error codes, clicking noises, or no power. This page lists common faults, part numbers, and solutions for these models.
2. Thetford N-Series Models Covered
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N3080 / N3090 / N3097
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N3100 / N3104 / N3108
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N3112 / N3115
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N3145 / N3150
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N3170 / N3175
These models often use control PCBs (main board) and eyebrow panels / user interface boards, along with integrated or separate ignition modules.
3. Common Faults & Symptoms
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Eyebrow / Display Panel Issues
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LEDs not lighting or blinking incorrectly
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Buttons unresponsive or stuck
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Display shows error codes
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Control Board Failures
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Fridge clicks but won’t ignite
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Gas mode fails
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Continuous “try start” loop
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Power supply faults
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Gas Valve / Solenoid Problems
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Fridge won’t light
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Low voltage or mechanical blockage
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Ignition / Spark Issues
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No spark at burner electrodes
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Flame not detected → solenoid closes
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Intermittent start failures
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Wiring & Connection Issues
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Burnt connectors on older boards
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Loose or corroded flame rectification sensors
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Faulty harness connections
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4. Common Thetford Control Board & Eyebrow Panel Part Numbers
| Part Number | Description / Type | Compatible Models / Notes |
|---|---|---|
| 691131 | Main Control PCB | N3080, N3090 |
| 691137 | Eyebrow / Upper Control Panel | N3080, N3090, N3097 |
| 691161 | Control PCB | N3100, N3104, N3108 |
| 691162 | Eyebrow Panel / User Interface | N3100, N3104, N3108 |
| 691118 | Eyebrow / Display Module | N3112, N3115 |
| 1.5vdc Euro-type Solenoid | Gas valve | Most N-Series models |
| Separate Spark / Ignition Module | If applicable | Some later or older models |
Note: Exact part numbers may vary slightly depending on production year. Always check your fridge’s PCB label.
5. Symptoms Linked to Each Part Number
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691131 / 691161 (Main PCB)
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Fridge won’t light in gas mode
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Repeated “try start” attempts
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PCB overheating or burnt connectors
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691137 / 691162 / 691118 (Eyebrow Panels)
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No LEDs, unresponsive buttons
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Error codes flashing incorrectly
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Display blank despite fridge powered
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GV100 Solenoid / Ignition Module
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No gas flow / ignition failure
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Spark not firing → PCB shuts solenoid
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Intermittent starting problems
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6. Troubleshooting & DIY Tips
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Check eyebrow board LEDs and buttons first
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Verify DC voltage to main PCB and solenoid
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Inspect wiring and connectors for corrosion or heat damage
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If spark module is separate, test independently
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Replace both PCB and eyebrow panel if multiple failures occur
7. Replacement & DIY Options
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OEM Thetford boards are expensive and often out of stock
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Aftermarket or universal PCB kits (compatible with 1.5v EU style solenoids) can restore gas logic, flame detection, and ignition for €150
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Works across most N-Series models
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DIY rebuilds possible with switches, LEDs, and solenoid control logic
8. Call-to-Action
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Internal Links:
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N3080 PCB replacement guide
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Eyebrow board 691137 replacement not necessary
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Spark module troubleshooting not needed as replaced as part of the universal replacement kit
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