An oven that runs hot, runs cold, or bakes unevenly is frustrating but, in most cases, a fairly routine and affordable repair. Here’s what’s usually behind it.
Temperature Sensor Faults Are the Usual Culprit
A failed or drifting temperature sensor is the most common cause of inconsistent baking, showing as an E027 or E118 error code. The sensor feeds temperature data to the control board continuously during baking — when it drifts even slightly, your oven can run 20-30 degrees off the set temperature without any obvious symptom besides inconsistent results.
How to Confirm It’s Not Just Your Recipe
Before assuming a fault, it’s worth placing an independent oven thermometer inside and comparing it to the set temperature over a full preheat cycle. A consistent gap confirms a sensor issue rather than a one-off baking mishap.
Control Board Faults Are Less Common, But Possible
If the oven won’t heat at all, rather than just running inaccurately, a control board fault like E029 may be to blame, especially after a recent power surge or outage.
Getting It Fixed
Temperature sensor replacement is one of the more routine, affordable repairs we perform. Visit our oven repair page to book a diagnostic.
Not Confident Doing This Yourself?
A factory-trained technician can diagnose and fix it safely, usually same-day.