2631-3481 Coleman OEM Replacement Thermocouple 24", S1-7675-348

For the Older Model Mobile / Modular Home Furnace OEM Part With Standing Pilot 

Specially made for older Coleman equipment 30mv 24" and works awesome with the Coleman Gas valves 1 year warranty, don't be fooled by the knockoff's cheap universal thermocouples that may last for a few months but doesn't match the 30mv supply that could damage the gas valve, Buy OEM and keep your Coleman Furnace running for years to come. 

Normal Stocking Item 26/27 Heating Season 

Coleman Mobile Home Product

The OEM 2631‑3481 is specifically tuned to Coleman’s 30 mV gas valves. Universal thermocouples often output lower or unstable millivolt levels, which can:

• cause pilot dropout

• damage the gas valve

• create intermittent heat calls

Identity & Function

• Part Numbers: 2631‑3481, S1‑7675‑348

• Length: 24"

• Millivolt Output: 30 mV (critical for Coleman gas valves)

• Type: Continuous‑pilot thermocouple

• Material: Copper with brass fittings

• Connection: Standard threaded pilot‑burner nut

• Application: Older Coleman mobile/modular home furnaces with standing pilot ignition

• Warranty: 1‑year OEM warranty 

Function: Senses pilot flame → generates 30 mV signal → keeps gas valve open. If flame is lost → signal drops → gas valve closes for safety.

 Compatibility

• Fits: Coleman mobile home and residential gas furnaces with continuous pilot systems

• Common Units: 7956A856, 7966A856, 7970A856, 7975A856, 7995A856, 8631A/B/C, 8632A/B/C, 8638A/B/C, and others using pilot ignition

• Ignition Type: Compatible with standing pilot assemblies—not for spark or hot surface ignition systems

• Mounting: Universal fit for most Coleman pilot burners with 24" reach

• Warranty:   1 year warranty 

2631‑3481 / S1‑7675‑348 Coleman OEM 24" Thermocouple — 30 mV standing‑pilot flame sensor for older Coleman mobile and modular home furnaces. Specially engineered for Coleman gas valves to deliver the correct millivolt signal for safe, reliable operation. Copper/brass OEM construction ensures long life and stable pilot performance. Direct‑fit replacement for legacy Coleman furnace families including 7956, 7966, 7970, 7975, 7995, and 8631/8632/8638 series.

Replacement & Cross-Reference Part Numbers

Duo-therm number 714072-001

Replacement Coleman 24" thermocouple senses pilot light and closes gas valve if no flame sensed. Used in most all furnaces with a pilot light.

Replaces 2631-347, 2631-3471, 2631-348, 2631-3481, 7675-3481, 026-34038-000, S1-7675-348, Q340A1074, 10P27, K17AT-24H, P671-0024, S1-2631-3481

Function & Application

This thermocouple generates a small electrical signal when heated by the pilot flame. That signal keeps the gas valve open. If the pilot goes out, the thermocouple cools and shuts off gas flow to prevent unsafe conditions.

A failing thermocouple can cause:

• Pilot not staying lit

• Furnace not firing

• Intermittent heating

• Pilot outages during windy or cold conditions

Replacing it restores reliable pilot operation.