Harman Room Air Sensor Thermostat Probe Fits Models: ~ Accentra Cast Freestanding (Accentra FS) ~ Accentra Insert ~ Accentra 52i Fireplace Insert ~ Invincible Insert ~ Invincible RS ~ P35i Fireplace Insert ~ P38, PP38, P38 , PP38 (For models that have the new style control board - non- turn knobs) ~ P43 ~ PC45 ~ P61A ~ P68 ~ Advance ~ XXV (25th Anniversary Model) ~ DVC 500 Coal Stove Part Numbers: ~ 3-20-00906 Specs: ~ Harman Room Air Sensor Thermostat Probe ~ Measures slightly over 5' in length ~ Works for all the above mentioned Harman Models ~ Includes connectors for direct installation ~ This probe regulates the stoves heat output based on temperature setting while operating in 'Room Temp' Mode. Placement of the probe is important. Do not have on cold floors, by drafty areas or where direct sunlight can effect it. We recommend coiling the probe up and letting it rest on the back of the stove. For insert models - place to the side of the unit 2-5ft up on the wall. ~ Genuine Harman OEM Replacement Part ~ Guaranteed Newest Stock ~ Exclusive 90 day manufacturer warranty with our no hassle replacement guarantee ~ Made in the USA