This is LENNOX M1-7 REV B 70M2101 Furnace Control Circuit Board 49L5501 with A57 and A56 incl. used part. 

This part was removed and inspected 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 in good working condition when removed. 

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

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

FREE standard mail delivery guaranteed.

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!