What F3T1 Means
F3T1 is published as a possible problem with the user interface thermistor or the associated wiring. There is a temperature sensor at the control panel itself, which matters on an over-the-range unit because the panel sits directly in the heat rising from the cooktop below.
Common Causes of F3T1
- Transient fault cleared by a reset
- Panel genuinely overheating from the cooktop below
- Thermistor connector loose
- Interface thermistor failed
🔧 One Safe Check You Can Try
Switch the microwave off at its circuit breaker for one minute, restore power, then run a short heating test with a cup of water to verify operation, which is the check Maytag asks for. Then think about how the appliance is used: if this code appears mainly after long sessions on the cooktop below, the panel may genuinely be getting hot, and running the hood fan while cooking helps. Test with a cup of water to confirm the microwave still heats. The thermistor itself is behind the panel and is not an owner part.
⚠ Why You Shouldn't Go Further Than That
- A microwave oven holds a high voltage capacitor that can retain a dangerous charge long after the appliance is unplugged, so the cabinet is never opened at home under any circumstances.
- An over-the-range unit is mounted above a cooking surface at head height and is heavy enough to need two people and a support to remove safely.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.