This is Honeywell ST9120G4038 Furnace Fan Control Circuit Board used part. 

This part was removed by HVAC installer from a fully functioning system. Old system was replaced with newer one (more energy efficient) and was in good working condition. This part was inspected by professional HVAC installer. 

This part is in good cosmetic condition. Please see more details from the images attached. 

Please check images carefully because you will receive the same item as pictured, or a very similar one. 

My handling time is 1 business day only. 

Purchasing used parts you agree with the statement that sometimes hidden defects or malfunctions may occur during installation or continuous use. There is no warranty on used parts. But you have 30 days satisfaction guarantee and 30 days FREE returns.