You just selected:
OVERLAY: TSC-8-GE1
Code Gecko
9916-100130

OVERLAY: TSC-8-GE1
Overlay for TSC-8 or k-8, 8 keys: 2 pumps, blower, light, filter, on/off, temperature up and down

You should also consider these companion products:

BOARD REPLACEMENT MSPA-MP-GE1
Code Gecko
0201-300014

BOARD REPLACEMENT MSPA-MP-GE1
BOARD REPLACEMENT KIT FOR MSPA-1 AND MSPA-4
Code Gecko
0201-300045

BOARD REPLACEMENT KIT FOR MSPA-1 AND MSPA-4
Continue shopping