HARMAN CONTROL CIRCUIT BOARD Fits Models: ~ Invincible RS ~ Invincible Insert ~ P61 * Manual Start Units Only. If you have a P61A you will require the Harman Platinum Control Board ~ P38 * P38 models Serial Number 008190059 and greater. If you have a P38 with the turn knob control panel, you will require the retro-fit kit 1-00-7738111 ~ Super Mag Stoker (Coal Stove) NOTE: Dip switch settings on the circuit board must be set based on the model & ESP Probe Wire Color prior to installation. Instructions are included. Part Numbers: ~ 3-20-00928 | 3-20-05378 | 3-20-05890 | 3-20-06142 | 1-00-06142 Specs: ~ Genuine Harman OEM Replacement ~ 120V AC ~ New shafts and knobs are included ~ Plug N' Play – Simple Installation, Instructions Included. Watch How To Install ~ Genuine HHT/Harman OEM Replacement Control Circuit Board ~ Guaranteed Newest Stock Inventory – Replaces all previous part numbers ~ 90 Day Manufacturer Warranty Against Manufacturer Defects only. Please make sure you require the control board prior to ordering.