🔥 100165931 Lochinvar Flame Sensor With Gasket – Replacement for PLT3023
The Lochinvar 100165931 Flame Sensor with Gasket Kit is an OEM-quality replacement designed for Knight XL series boilers. This sensor ensures accurate and reliable flame detection, maintaining safe and efficient operation. The kit includes the flame sensor and mounting gasket, allowing for straightforward installation.
✅ Key Features
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✅ Direct Replacement for PLT3023, PLT2027, and 100165899
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✅ OEM-quality flame sensor with included gasket
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✅ Compatible with a wide range of Lochinvar Knight XL series boilers
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✅ Monitors burner flame and signals the control module for safe ignition
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✅ Durable construction for high-temperature and high-cycle applications
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✅ Easy installation with included mounting hardware
📊 Specifications
| Specification | Detail |
|---|
| Manufacturer |
Lochinvar |
| Part Number |
100165931 |
| Old Part Number |
PLT3023 |
| Included Components |
Flame sensor + gasket |
| Compatible Models |
Knight XL boilers including AWN, KBN, XPN, OXN, AWL, SBN, SBL, SB, AW, XP, KB series (full model list above) |
| Replacement For |
PLT3023, PLT2027, 100165899 |
| Function |
Detects flame presence and signals ignition control |
| Application |
Residential and commercial Knight XL series boilers |
🔁 Cross Reference / Compatible Replacements
| Replaces | Brand / Part |
|---|
| PLT3023 |
Original Lochinvar Flame Sensor |
| PLT2027 |
Legacy Replacement Part |
| 100165899 |
OEM Sensor for Knight XL Series |
⚠️ Common Symptoms / When to Replace
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Boiler fails to ignite or maintain flame
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Frequent lockouts due to flame detection failure
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Intermittent flame sensing or weak flame signal
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Visible soot, corrosion, or damage on the sensor rod
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Inconsistent heating performance
Replacing the 100165931 flame sensor restores reliable ignition and safe operation of your boiler.
💬 Frequently Asked Questions (FAQ) ❓
Q: Which boilers does this flame sensor fit?
A: Fits Lochinvar Knight XL series boilers, including AWN, KBN, XPN, OXN, AWL, SBN, SBL, SB, AW, XP, KB series (full model list above).
Q: Does this include the mounting gasket?
A: Yes — the kit includes the flame sensor and gasket for proper installation.
Q: What causes flame sensors to fail?
A: High heat cycles, soot buildup, oxidation, or mechanical damage.
Q: Will replacing this sensor fix burner lockouts?
A: Yes — replacing a faulty flame sensor resolves most flame-detection related lockouts.
Q: Is this a direct replacement for PLT3023?
A: Yes — it replaces PLT3023, PLT2027, and 100165899.
🛒 Shopping Tips
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Verify your boiler model and series before purchase.
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Inspect the existing flame sensor for cracks, corrosion, or soot buildup.
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Ensure the included gasket is used for proper sealing.
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Handle the sensor carefully; the sensor rod is fragile.
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Keep a spare sensor for frequent maintenance or multiple boilers.
