Description
Lochinvar 100165937 Hot Surface Ignitor with Gasket
The Lochinvar 100165937 is an OEM hot surface ignitor used to ignite the main burner in compatible Lochinvar boilers and water heaters.
Part number 100165937 replaces the older PLT3400 hot surface ignitor and is also commonly cross-referenced to 100165904.
The ignitor features a two-wire connection and two-hole mounting design and is supplied with the required ignitor gasket.
Product Specifications
- Manufacturer: Lochinvar
- Part Number: 100165937
- Product Type: Hot Surface Ignitor
- Alternate Part Number: PLT3400
- Replaces: 100165904
- Mounting: 2-Hole
- Wiring: 2-Wire
- Gasket Included: Yes
- Application: Boiler & Water Heater Burner Ignition
- OEM Replacement Part: Yes
Compatible Lochinvar Equipment
The Lochinvar 100165937 hot surface ignitor is used on multiple Lochinvar commercial boiler and water-heater families, including select:
- Copper-Fin boilers
- Copper-Fin water heaters
- Copper-Fin II equipment
- Power-Fin boilers
- Power-Fin water heaters
- PB Series equipment
- PF Series equipment
Lochinvar parts literature specifically lists 100165937 as the hot surface ignitor for current Power-Fin PB/PF 1501, 1701 and 2001 models.
Because Lochinvar used this ignitor across multiple product generations and model sizes, always confirm the equipment model and serial number before ordering.
What Does the Lochinvar 100165937 Do?
The 100165937 hot surface ignitor heats to ignition temperature during the startup sequence.
Once energized, the ignitor provides the heat required to ignite the gas burner. If an existing ignitor is cracked, damaged or no longer heating properly, the burner may fail to light and the boiler or water heater may enter ignition lockout.
Does 100165937 Replace PLT3400?
Yes.
Lochinvar 100165937 is the replacement part number for the older PLT3400 hot surface ignitor.
Customers may find the same ignitor referenced under:
- 100165937
- PLT3400
- 100165904
- Lochinvar PLT3400 Ignitor
- Lochinvar Hot Surface Ignitor
Is the Gasket Included?
Yes.
The Lochinvar 100165937 replacement ignitor is supplied with an ignitor gasket.
A proper gasket is important for correct installation and sealing of the burner assembly.
What Equipment Uses the PLT3400 Ignitor?
The PLT3400 / 100165937 ignitor has been used in several Lochinvar commercial boiler and water-heater families, including Copper-Fin, Copper-Fin II and Power-Fin equipment.
Exact compatibility depends on model size, production date and serial number.
OEM Lochinvar Replacement Part
Using the correct Lochinvar OEM ignition component helps maintain the original burner ignition configuration and proper fit.
When replacing an existing PLT3400 or 100165904 ignitor, verify that 100165937 is listed for the specific Lochinvar model and serial number.
Need Help Confirming Compatibility?
Memphis Control Center stocks Lochinvar boiler and water-heater replacement parts.
If you are unsure whether 100165937 / PLT3400 fits your unit, provide the Lochinvar model and serial number and we can help identify the correct replacement part.
