I have a 2000 Sundance Portofino. I replaced the heating element and plugged the hot tub in. The indicator light for the heater didnt light up. And I can hear a periodic clicking noise coming from the control box. Can you help with this problem?

I have a 2000 Sundance Portofino. I replaced the heating element and plugged the hot tub in. The indicator light for the heater didnt light up. And I can hear a periodic clicking noise coming from the control box. Can you help with this problem?