​ 21866

The 21866 Circuit board is an OEM replacement control board for multiple portable kerosene portable residential and commercial heaters from Mr. Heater and HeatStar.

Compatible HeatStar Models:

• HS50K
• HS75KT
• HS125KT
• HS210KT

Compatible Mr. Heater Models:

• MH50KR
• MH75KTR