We carry a variety of replacement new heaters and heater parts for your jetted hot tub and spa needs. Before replacing your heater verify that you have voltage across both heater leads when your spa is calling for heat. If the voltage zero's out the problem is more likely not the heater and possibly the circuit board heater relay. Most heaters will have an identification tag with a part number listed. Use the part number to verify the correct replacement needed. You can also replace the heater element in some cases.