1. Check whether the fuse is blown. If the fused should be eliminated, check whether the plug is firmly inserted, whether the stigma and jack are tightly combined, and then check whether the power cord is broken. 2. Check whether the tubular heater is plugged in well. Whether the hot wire inside the heater is burned, test the two terminal posts of the heater with a multimeter during inspection to find out the fault, and if an open circuit is found, the electric heating pipe should be replaced. 3. Check the contacts of the temperature regulator and timer. If the contact contact is poor, such as the distance is too large, the moving contact and the static contact are not in close contact, that is, there is an open circuit, and the two contact points should be connected.
If it is the contact of the temperature regulator, after repairing it to make contact, the temperature regulation performance of the thermostat must be re-checked with a galvanic thermometer to make the dial indicator match the actual temperature in the box, otherwise the temperature of the oven cannot be accurately grasped. After multiple contact points, the ablation phenomenon will occur due to electric sparks, and it will also affect the power, so that the electric oven is not hot. If contact ablation is found, the ablation can be gently wiped with sandpaper to make the contact well. Whether the heating switch of the high-temperature oven is on, whether the heating indicator is on, and if not, turn on the switch. May be high temperature oven thermostat status and setting problems, thermostat SV greater than PV value, thermostat will heat, pay attention to check whether the thermostat's overtemperature alarm indication is abnormal, whether the thermostat opens the program to run, some powerful thermostats also have some complex functions, such as standby, maintain state, these states occur, may cause the oven not to heat.
