What the Error Code Means
Error code C-20 generally means the oven detected a higher-than-expected temperature and paused to protect itself.
It points to an overheating condition rather than a confirmed single failure.
Common Symptoms You May Notice
- The oven shuts down mid-cycle or will not continue heating.
- The display shows C-20 and the oven may beep.
- A cooling fan may run after the oven stops.
Most Common Causes (From Least to Most Serious)
- Extended high-heat use: Long bake or broil times can raise internal temperatures and trigger a safety pause.
- Airflow around the oven is restricted: Pans or foil near vents can reduce airflow and cause heat to build up.
- Temperature sensing is outside the expected range: In some cases the oven pauses when it cannot confirm normal temperature behavior.
Safe Things You Can Check Yourself
- Turn the oven off and allow it to cool completely before restarting.
- Make sure oven vents are not blocked by cookware or foil.
- Power cycle the oven: turn it off at the control panel, wait one minute, and turn it back on.
If at any point this feels unsafe or unclear, stop and contact a professional.
When to Stop and Call for Service
- The C-20 code returns after cooling and a reset.
- The oven shuts down repeatedly even during normal baking.
- You notice smoke, burning smells, or the oven will not heat safely.
Typical Repair Cost Range
$150-$450 is typical for professional diagnosis and repair of oven overheating issues, depending on the cause and parts involved.
Costs vary by region, model, and provider. Request an estimate before approving any repair.