Black ESP Thermistor Probe | Exhaust Sensing Probe for Pellet Stoves | Part #3-20-11744

Black ESP Thermistor Probe – 3-20-11744 | Exhaust Sensing Probe | OEM Replacement for Pellet Stoves

Keep your pellet stove heating efficiently with the Black Exhaust Sensing Probe (ESP), part 3-20-11744. This thermistor-based sensor continuously monitors exhaust temperature to regulate burn rate, stabilize room heat, and optimize fuel usage. It is the OEM replacement for a wide range of Harman systems and other leading pellet stoves.

Key Features:

• Precision Temperature Control – Helps maintain room temperature within 1°F of the setpoint
• OEM-Grade Replacement – Directly replaces legacy part 1-00-00744 for consistent, reliable performance
• Correct Identification – Black lead wire denotes the proper ESP version for compatible models
• Efficiency Booster – Accurately regulates burn rate to improve heat output and reduce pellet consumption
• Durable Construction – Built to withstand harsh exhaust environments for long service life

Specifications:

• Part Number: 3-20-11744
• Replaces: 1-00-00744
• Type: Exhaust Sensing Probe (thermistor)
• Lead/Wire Color: Black
• Function: Monitors exhaust temperature for control board regulation
• UPC: 652174647279
• Sold As: Individual probe

Compatible Models:

• Harman P-Series: P61, P61A, P68
• Harman Accentra: Accentra Cast Pellet Stove, Accentra Pellet Insert (multiple sizes)
• Harman XXV: XXV Cast Pellet Stove
• Harman Advance / 44 Magnum: Advance, 44 Magnum
• Harman Invincible: Invincible Insert, Invincible RS
• Harman PC45: PC45 Pellet Stove
• Central Heat: PF100 Pellet Furnace, BA-100 Pellet Furnace
• Coal & Other: DVC-500 Direct Vent Coal Stove

Note: The table of Harman assemblies and color variants (e.g., Mojave Red, Forest Green, Porcelain finishes) in your listing corresponds to units that use this Black ESP probe. If unsure, match by part number or consult your stove’s manual.

Pairs well with: Pellet Parts

Why Replace Your ESP?

A failing ESP can cause erratic operation, poor temperature regulation, and higher pellet usage. Replacing it restores accurate feedback to the control board so your stove maintains steady heat and peak efficiency.