The short answer
F4 E7 is the one code on this list with an answer you can act on immediately: the table records that the oven meat probe must not be used in the microwave, because the two probes have different resistance values. The control has read a probe it does not recognise. Take it out, use the probe that belongs to that cavity, and the code goes away.
Code table
Reference| code | meaning | owner-checkable |
|---|---|---|
| F4 E7 | Do not use the Oven Meat Probe in the Microwave, they have different resistance values. | yes |
| F4 E6 | There may be a problem with the Microwave Wave Guide Temperature Sensor, or the associated wiring. | see page |
| F4 E8 | There may be a problem with the Microwave Inverter, or the associated wiring. | see page |
What you observe
- The code appears as soon as a probe is plugged in — The control reads the probe the moment the jack is made.
- The programme refuses to start — A probe-controlled cook will not run on a reading the control cannot trust.
- Everything works with the probe unplugged — The clearest confirmation that the probe, not the appliance, is the issue.
- NEAR MISS — the correct probe also gives a code — That is a probe or jack fault rather than the wrong-probe message.
Likeliest causes first
- The wrong probe in the socket — First, because it is what the table describes: the oven probe and the microwave probe look alike and are not interchangeable.
- A damaged probe lead or tip — Second: probes are flexed, washed and trapped in doors, and a broken conductor reads like the wrong part.
- The probe jack or the control input — Last: the socket takes repeated insertions and can lose contact, but only after the probe itself is cleared.
Check in this order
- Unplug the probe and clear the code — If the code goes, the answer is already in your hand.
- Check which probe you are holding — The two probes are matched to their cavities and carry different values.
- Try the correct probe, then try none — Three quick states that tell you whether anything is actually wrong with the appliance.
Owner-safe steps
- Remove the probe from the socket — This alone resolves the majority of these codes.
About 5 min
- Use the probe supplied for that cavity — The table is explicit that the two are not interchangeable.
About 5 min
- Inspect the lead for kinks, cuts and a bent tip — A visibly damaged probe is a cheap part to replace and needs no service call.
About 10 min
- STOP HERE — the jack is behind the cavity wall — A socket that fails with a known-good probe is a technician job.
Safety first
Safety
Unplug the appliance or switch off its breaker before removing any panel — a capacitor can hold a charge after the power is off. An oven carries a heavy element circuit behind the rear panel, and the cavity stays dangerous long after the heat is off. Leave the door lock and its switch wired exactly as they are.
When to call
Call only if the correct, undamaged probe still produces the code, which points at the jack or the control input rather than at anything you can swap. That is a genuine but uncommon fault. Everything before that point is an owner fix costing nothing, and a replacement probe is one of the cheapest parts on the appliance.
Neighbouring codes — F4 E6 and F4 E8 appear beside F4 E7 in the table and are recorded against different hardware — different questions with different answers. A shared prefix on this brand is not a shared fault.
What this page does not cover
Generalized information: this reads F4 E7 as the shared Maytag oven table records it, so it covers the model lines using that table and no others. Where a page exists for your family or model line, that one is the more specific answer — start there if your model is named. Not here: wiring colours, connector positions and part numbers, which differ by family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
