Key fob stopped working after replacing the window Master switch?

These cars have many different types of master window switch, did you get the same part number? If so, the switch is defective and needs to be swapped out. It masters if it is a 2 or 4 door and trim levels as well, here are the four different parts numbers.

2 Door
LX
Window Switch - 35750SDNA02 $314.63

EX
Window Switch - 35750SDNA12 $314.63

4 Door

DX
Window Switch - 35750SDAA32 - $160.62

LX
Window Switch - 35750SDAA02 - $266.57

EX
Window Switch - 35750SDAA12 - $226.77

Check out the images (below). Please let us know what happens.

There must be another option for the window switch. I would contact the dealer for the part if you can't find the other options.

Here is the part you need:

https://www.hondafactoryparts.com/oem-parts/honda-2003-2004-honda-accord-switch-assembly-power-window-master-35750sdna02

Please let us know what happens.

Yep, the connects inside the switch become dirty/arched. I have seen people open them up and clean the contacts to get the switch working again. It might be worth a try.