Replacement thermister probe (ESP Probe) for Harman stoves. ESP is short for "Exhaust Sensing Probe". This is the probe with two (2) red wires. Click on the photo to enlarge and view other angles. Fits the following Harman stove models:

Harman Pellet Stoves:

Accentra Cast FS (Serial # 00840167 and higher)

Accentra Insert (Serial # 008241201 and higher)

Advance (Serial # 008360001 and higher)

HF60

P35i Pellet Insert

P43

P61 (Serial # 008085055 and higher)

P61A (Serial # 008085803 and higher)

P68 (Serial # 008280309 and higher)

PB105

PC45 (Serial # 008055031 and higher)

PF100 (Red Wires)

XXV (Serial # 008206292 and higher)

Harman Coal Stoves:

DVC 500 (Serial # 008065076 and higher)

Harman part number 3-20-00844
OEM Harman part.