@ctilley79 said in Spurious heater faults again:
Regarding PWM. If I recall, depending on the PWM frequency, it will result in slowing down the heating process via pulsing from high/low 60% of the time.
The PWM value is the percentage of time spent "On" vs "Off". So if you used a value of 0.6, then it would indeed spend 60% of the time on (at full power) and 40% of the time off. The PWM frequency is how fast it cycles. So for example if you used a frequency of 100 Hz, that would be one cycle every 10 milliseconds. So within each 10ms period it would be on for 6ms and off for 4 ms.