1. Ɔhyew no kɔ soro nanso endu baabi a wɔahyɛ no:
1) Hwɛ thermostat no mu. Eyi ka thermostat no ɔhyew output tebea, output tumi ratio nhyehyɛe (sɛ thermostat no wɔ saa dwumadie yi), thermostat no ɔhyew akatua nhyehyɛe, thermostat no over-temperature setpoint adeyɛ ne setpoint, ne PID parameters (hwɛ adwumayɛbea nhyehyɛe no).
2) Hwɛ heaters ne heating control circuitry no mu. Oven ahorow bi de ɔhyew akuw pii di dwuma. Hwɛ sɛ kuw biara reyɛ adwuma yiye. Fa clamp-on ammeter susu current biara a ɛwɔ phase biara a ɛwɔ heating group biara mu, anaasɛ twa heaters no mu na susuw wɔn resistance.
2. Ɔhyew no nkɔ soro anaasɛ ɔhyew afiri no nyɛ hyew:
1) Hwɛ thermostat no tebea ho nsɛnkyerɛnne ne ne nhyehyɛe.
2) Hwɛ heaters ne control circuitry, a nea ɛka ho ne sɛ AC contactor no ayɛ adwuma yiye, sɛ ebia heating circuit breaker no abue, ne sɛ ebia intermediate relay no reyɛ adwuma yiye.