L.B. White 503497 Thermocouple Replacement for All Models LP/Natural Gas Heater

SKU: 503497

Weight	0.5 lbs
Dimensions	8 × 8 × 8 in

$29.08

In stock — available to order.

Sold individually. Each quantity ordered is one unit. Kits are one complete kit; products sold by length use the stated length unit.

Same-item volume pricing

Quantity	Unit price	Saving
1–4	$29.08	0%
5–9	$27.63	5%
10+	$26.17	10%

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L.B. White 503497 Thermocouple Replacement for All Models LP/Natural Gas Heater

Specifications & product details

Overview

The L.B. White 503497 Thermocouple is a genuine OEM replacement part engineered to ensure reliable operation across all L.B. White heater models. This component acts as a critical safety device that monitors pilot flame presence, maintaining proper ignition and preventing gas leaks in LP and natural gas systems.⚙️ Key FeaturesOEM Certified Replacement – Designed and tested for all L.B. White heater models.

Universal Compatibility – Fits both propane (LP) and natural gas systems.

Durable Construction – Features a copper thermocouple lead and brass threaded connectors for corrosion resistance.

Easy Installation – Plug-and-thread design ensures quick replacement with standard tools.

Reliable Flame Sensing – Provides accurate safety feedback to the control valve for dependable ignition.🔩 ApplicationsPerfect for use in:L.B. White heaters (Premier, Tradesman, Guardian, and other models)Agricultural, construction, and warehouse heating systemsPropane and natural gas appliances with pilot safety systems📐 SpecificationsManufacturer: L.B. WhiteModel/Part #: 503497Type: ThermocoupleLength: 22Material: Copper and BrassFuel

Compatibility:

LP Gas / Natural GasFunction: Flame Safety SensingConnection: Male Threaded FittingThis easy to install Snap-In Thermocoupler works with LB White® pilot light model heaters. 22" long. LBW #503497Works with the Following LB White Pilot Light HeatersClassic™ 60: QC Part #20208, QC Part #20209, QC Part #20210 & QC Part #20211Classic 115: QC Part #20215, QC Part #20216, QC Part #20217 & QC Part #20218Classic 170 HeatersGuardian™ AB250: QC Part #20192 & QC Part #20194⚡ BenefitsRestores safe pilot operation in L.B. White heatersPrevents gas leaks and flame-out issuesBuilt to OEM specifications for perfect fit and reliable functionSimple replacement to extend heater lifespan

⚠️ Safety Notice

WARNING:

Cancer and Reproductive Harm – www.

P65Warnings.ca.gov

Product details

Part / SKU	503497

Compatibility & part-number help

Match the manufacturer part number and equipment model to the listing. Check connection sizes, fuel type, pressure or capacity, voltage and dimensions where applicable. A similar appearance or part number alone does not confirm compatibility.

For help, send a parts inquiry with the part number, equipment model, label photos and quantity. Manufacturer documents and item-specific information, when supplied, are in the product details above.

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