1, the indicator does not light, can not be heated: the reason may be the power supply fuse is burned out, the door is not closed, the thermal circuit breaker contacts open circuit, need to check one by one, and then repair according to the situation. If the exhaust, found that the power supply fuse is blown, should be replaced with a suitable fuse; furnace door is not closed, re-closed the door; thermal circuit breaker contacts open circuit, replace the circuit breaker.

2, the light is on, can not be heated: the cause may be high-voltage diode damage, high-voltage capacitor failure or breakdown, high-voltage device damage, magnetron aging or damage. The correct solution is to check the high pressure diode forward and reverse resistance resistance, if damaged, according to the original specifications for replacement. Check the high-voltage capacitor, if damaged, according to the original specifications for replacement. Check the transformer, if damaged, repair or replacement. Check the magnetron, if damaged, should be replaced according to the original model number.