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Watkins - Circuit Board 77087 PCB: IQ2020 Main Control Board - 77087
AI #3-60-0019 / MFG #77119
Heater Relay Board
Factory Replacement For:
Hot Spring
Tiger River
Limelight
2001-2009.5
Replacement Option For: MFG # 73223
Techical Notes:
1) You must purchase new sensors if you're replacing a first generation motherboard (2001-2002) with sensors that are connected directly to the ports on the right side of the exterior of the control box.
39204 Hi-Limit
39205 Temp Sensor
2) This circuit board does not come with a Pressure Switch Bypass jumper. The jumper must be plugged into P34 port labeled pressure switch. Use the existing gray cable from the heater that plugs into the P34 port or if your old circuit board has this jumper installed, you can remove it to install on the new board.
This board is used with Heater Relay board 74618 (New Part Number 77119).