What should I do if the oven does not heat up?

For a heating oven, the heating system is the core of the entire device. It consists of the thermostat, switch, heating tube, temperature sensor, and control circuit electronic components, making it crucial for the oven. Problems with the heating system can have a significant impact on the oven. Prompt analysis and diagnosis are crucial to quickly resolve the issue. Today, we'll explain how to handle a non-heating oven.

1. Is the heating switch on? Is the heating indicator light on?

2. Check the thermostat status and settings.

1) Is the thermostat SV value set correctly? The thermostat will only heat when SV > PV.

2) Is the thermostat's heating output indicator light on? Typically, the thermostat's heating indicator light is C1 or out. When heating, the indicator light will either illuminate or flash. The brightness and flashing frequency of the indicator light vary depending on the heating output power and pulse duration.

3) Check the thermostat for abnormal over-temperature alarms and whether the set values ​​and parameter values ​​are normal. For example, check if the AL1 and AL2 alarm indicators are abnormal. If the AL series indicator lights up, if it corresponds to the over-temperature alarm setting, the oven will not heat up, and the heating output indicator will also go off.

4) If the thermostat is a programmable thermostat, check whether the program is running.

5) Some more powerful thermostats have complex functions, such as standby and hold. These conditions may cause the oven to not heat up.

3. Check for abnormalities in the temperature sensor.

1) The temperature probe may have slipped, fallen into a blind spot, or been touched, preventing it from sensing the normal operating temperature.

2) The temperature probe may be faulty. Open the oven door, measure the actual temperature, and compare the PV value to see if there are any abnormalities.

4. Check that the electrical system is functioning properly. Compare the oven electrical diagram to check that the electronic components in the heating system are functioning properly.

1) Check the circuit breaker in the heating system to see if it has tripped.

2) Check whether the AC contactor that controls the heating is properly engaged during heating.

3) Check whether the indicator light on the intermediate relay that controls the AC contactor is on during heating, indicating continuity.

4) Check whether the indicator light on the solid-state relay is on. If it is off, it indicates no heating. If 1) and 2) are normal and the instrument is normal, there is a problem with the solid-state relay.

5) Check whether the heating element is open. You can use a clamp ammeter to measure the current in the heating element to determine whether it is heating. Alternatively, turn off the external power supply to the oven, disconnect the circuit connecting the heating element, and measure the resistance of the heating element to determine if it is faulty.

The above is how to analyze, diagnose, and resolve the issue when the oven is not heating. If a problem cannot be identified and resolved, contact the manufacturer promptly for repair to avoid further problems.