First try disconnecting the harness from the back of the touch pad and reconnecting to insure good, clean connections. If this does not correct the problem find the HWH control box. It is usually near the pump assembly and has a clear plastic cover over the control board and a rubber seal holding it to the box. Inside the box are an array of fuses with led lights. You will need either the owners manual or service manual for this system to verify the correct led's have the correct amber or red color. If you find one wrong there is probably a fuse blown or you may find a bad control board or touch pad. Call HWH for tech support and they can walk you through diagnoses.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7