1991-1992 1 or 2 pumps. This board replaces 6600-010 and 6600-101 1 pump board.
This board may have 2 more relays then your current board, they will not be used.
Please note that this circuit board or any other circuit board cannot be returned if it is installed. If you are unsure this is the circuit board you need, please email us the information off of your circuit board and if possible the model and year of your spa.We may ask for additional information, before confirming the circuit board needed, if we confirm the wrong board and it is installed then we will allow it to be returned due to our error.