Direct to Homeowners
1-778-759-9864
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BCFurnace

Furnace Thermocouples & Pilot Assemblies

We sell directly to the homeowner

A thermocouple is the safety device on a standing-pilot appliance. Heated by the pilot flame, it generates a small millivolt signal that holds the pilot gas valve open; if the pilot goes out, the signal collapses and the gas shuts off. Common on older furnaces, boilers, and water heaters.

11 thermocouples & pilot assemblies in stock, ready for same-day pickup at our Coquitlam warehouse or shipped worldwide.

Signs your thermocouple may have failed

  • Pilot lights but goes out as soon as the knob is released
  • Pilot will not stay lit even though the flame looks strong
  • Pilot flame is weak, yellow, or lifting off the thermocouple tip

Not sure which part you need? Call 1-778-759-9864 with your furnace model number and we will confirm it before you order.

Shop thermocouples & pilot assemblies by brand

Lennox11

Thermocouples & Pilot Assemblies we stock

1/2" X 1/2" 24V DUAL STANDING PILOT GAS VALVE INLET/OUTLET STEP OPENING NATURAL FUEL 0.7 A Thermocouples, Pilot Assembly, Pilot Tubing furnace part

1/2" X 1/2" 24V DUAL STANDING PILOT GAS VALVE INLET/OUTLET STEP OPENING NATURAL FUEL 0.7 A

Part #: 427-089
In Stock
CA$1,651.71
PILOT ASSEMBLY TARGET Thermocouples, Pilot Assembly, Pilot Tubing furnace part

PILOT ASSEMBLY TARGET

Part #: 745-001
In Stock
CA$114.06
LENNOX PILOT ASSEMBLY Thermocouples, Pilot Assembly, Pilot Tubing furnace part

LENNOX PILOT ASSEMBLY

Part #: 745-010
In Stock
CA$274.19
LENNOX PILOT BURNER ASSEMBLY Thermocouples, Pilot Assembly, Pilot Tubing furnace part

LENNOX PILOT BURNER ASSEMBLY

Part #: 745-020
In Stock
CA$267.61
PILOT BURNER 0.021" SIZE, NON-UNIFORM “C” SECTION Thermocouples, Pilot Assembly, Pilot Tubing furnace part

PILOT BURNER 0.021" SIZE, NON-UNIFORM “C” SECTION

Part #: 745-021
In Stock
CA$554.96
LENNOX PILOT UNI-KITS 180DEG Thermocouples, Pilot Assembly, Pilot Tubing furnace part

LENNOX PILOT UNI-KITS 180DEG

Part #: 745-022
In Stock
CA$78.13
LENNOX PILOT BURNER REPLACEMENT KIT Thermocouples, Pilot Assembly, Pilot Tubing furnace part

LENNOX PILOT BURNER REPLACEMENT KIT

Part #: 745-024
In Stock
CA$121.70
PILOT BURNER W/ELECTRODE USED WITH INTERMITTENT/STANDING PILOT, 0.018" , L SHAPE BRACKET Thermocouples, Pilot Assembly, Pilot Tubing furnace part

PILOT BURNER W/ELECTRODE USED WITH INTERMITTENT/STANDING PILOT, 0.018" , L SHAPE BRACKET

Part #: 745-025
In Stock
CA$180.96
18" THERMOCOUPLE 30MV Thermocouples, Pilot Assembly, Pilot Tubing furnace part

18" THERMOCOUPLE 30MV

Part #: 745-031
In Stock
CA$35.88
24" THERMOCOUPLE 30MV Thermocouples, Pilot Assembly, Pilot Tubing furnace part

24" THERMOCOUPLE 30MV

Part #: 745-101
In Stock
CA$35.88
ALUMINUM PILOT TUBE 1/4" X 5' FOR FURNACE, BOILER AND HOT WATER TANK Thermocouples, Pilot Assembly, Pilot Tubing furnace part

ALUMINUM PILOT TUBE 1/4" X 5' FOR FURNACE, BOILER AND HOT WATER TANK

Part #: 745-200
In Stock
CA$61.42

Thermocouples questions

Pilot lights but will not stay lit — is it the thermocouple?
Usually, yes, but check the flame first. The pilot flame should be blue and should envelop the top third of the thermocouple tip. A weak or yellow flame points to a partly blocked pilot orifice instead. If the flame looks right and the pilot still drops out, a working thermocouple should produce roughly 20–30 millivolts open circuit — below that, replace it.
What length do I need?
Thermocouples are sold by length — 18", 24", 30", 36". Take the length of the old one, or measure the run from the pilot assembly to the gas valve. Longer is generally safe as the excess can be coiled, but too short will not reach.

Need it today in Greater Vancouver?

Call ahead and we will set the part aside at the Coquitlam counter. No account, no trade card, no minimum order.

1-778-759-9864Pickup details