I replaced a bad heater coil and broken pressure switch but there is still no heat to the tub. What else could be wrong?
First check incoming power (L1 to L2 for 240v and both hot legs to Neutral for 110v) to insure proper voltage is reaching the control. Next, go to the heater element and measure for voltage reaching the element. If you have voltage at the element then we need to determine whether the element is capable of heating. The easiest way to accomplish this is to kill the power, disconnect both wires to the element, and measure the resistance across it. You should get between 9 and 12 ohms resistance. Failure to get continuity across the element indicates the filament is broken and the element is bad. Good resistance indicates the element is capable of heating and the problem is likely that the heat is not reaching the tub due to poor flow. Check the valves, adjustable jets, and filter. No voltage reaching the element indicates another component problem inside the control. Trace the heater supply wires back until you find the heater voltage. The component or connection immediately after the poi
