Update - Wired properly the Pr cycle finishes, the heater lamp goes on and a few moments later the low pump speed starts only to shut off within a minute or so of operation. Shouldn’t the heater be timed to come on after the pump is running on low speed?
This 120v pump is plugged into a GFCI which has 120v idle, 114v after the heater starts and only 106v when the motor starts on low. These readings were at the GFCI but similar readings were obtained at the AMP connector to the PCB. The amps on the low speed leg at this connector were about 20 amps. Clearly there are voltage and current issues that are likely causing the motor’s thermal protection to trip. Is there a relay or other circuit in the Balboa controller that could cause the voltage and current deviations?
Thinking this to be unlikely I am going to replace the GFCI, or test without it, to see if it makes a difference in the voltage and current. FYI - other loads on this circuit have been eliminated to reduce possible adverse impact from them.
Removing the load created by the heater did not change the circumstances mentioned above.