My 2 year old Frigidaire dryer stopped heating but still runs. Thermostat, control thermistor and heater relay are all good. Fault codes are E5B (heater fault) and E9E (?).

If everything test good, clean the vent hose all the way out to wher it exits house,open unit up and clean the vent screen inside the unit, remover the blower on clean it and the housing very well. Did you test the element?