DIY Series 42: Pensonic Slow Cooker (PSC-301) Malfunction

Symptoms:

• All status LEDs (Low, Auto, High) are working fine when Power ON, but slow cooker is not heating up.

Findings:

• Found that the thermistor is having open circuit.
• This thermistor should be NC (Normally Closed) by default.

Photos:

1. Turn the slow cooker upside down to start to dismantle the external housing
2. Unscrew the center nut (1st nut)
3. Unscrew the 2 screws of power cord
4. Remove the power cord cover so that the power cord is easily pull out (when needed)
5. Remove the knob cover
6. Remove the nut under the knob cover using plier
7. Push the knob into the housing
8. Remove the inner metal base pot from the external housing
9. Unscrew 2nd nut from the screw to take out the Earth Line
10. Unscrew 3rd nut to remove the thermistor (use plier) and check using multimeter, replace with new thermistor (for this case)
11. Thermistor: KSD301, 250V, 10A, 150°C. (Original part was 145°C)
12. Info on NC (Normally Closed) and NO (Normally Open)

Tools required:

• Screwdriver, multimeter, plier

Costs involved:

Thermistor (KSD-301, 250V, 10A, 150 Degree Celsius, NC): 

• Online Store: US$1 ~ US$2
• Physical Store: US$2 ~ US$3