美国采购需求：热水热泵、热泵热水器、家用热泵、泳池加热器、太阳能泳池加热器、电动泳池加热器

I'm reaching out regarding the malfunction of a controller in our heating system. The unit has completely stopped functioning, and we're unable to power on the heater. There's no display or any activity on the controller screen, making it impossible to control the heating operations. Could you provide assistance or potential solutions for this issue? We're looking to understand possible repair options or replacement parts needed to get the system back up and running. Your prompt response will be greatly appreciated, as we rely on this equipment for our operations.