Thermador Oven F24 Error Code: Temperature Sensor Fault

Quick Answer

F24 on a Thermador oven means the RTD temperature probe has failed or its connector has come loose. Thermador uses RTD probes, not thermistors - the resistance spec at room temperature (68 degrees F) is 1,080-1,095 ohms, rising to approximately 1,385 ohms at 212 degrees F. Start by checking the probe connector behind the oven before assuming the probe has failed - a loose connector is the cheapest fix.

F24 usually shows up right after a self-clean cycle or when the oven gets moved during a kitchen reno. The oven locks out completely because it can't safely heat without knowing the cavity temperature. You're looking at under fifty bucks to fix it, and honestly it's one of those repairs you can diagnose yourself in ten minutes with a multimeter. Don't ignore it though. Cooking blind without temperature feedback is just asking for a bad outcome.

ThermadorOvenSeverity: moderate90% DIY Success

Time to Fix

5–20 min

Difficulty

beginner

Parts Cost

$25 – $45

Tools Needed

Multimeter (required for RTD resistance test), Phillips #2 screwdriver (probe mounting screw)

What Does the F24 Code Mean?

When I see F24 on a Thermador, I go straight to the RTD probe. Unlike the cheap NTC thermistors most budget brands use, Thermador's RTD sensors are way more precise but they're also more sensitive to heat damage and vibration. Your control board literally can't operate without that signal. So when the probe drifts out of range or goes open circuit, the board shuts everything down and throws F24. It's actually one of the more fixable error codes on these ovens.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

RTD probe open circuit - probe element has failed40%

Probe connector behind the oven pulled loose24%

RTD probe reading far outside expected resistance range22%

Wiring harness between probe and control board damaged14%

Symptoms You May Notice

F24 flashes on the display and the oven flat-out refuses to start preheat, doesn't matter how many times you hit the button.
Oven shuts off mid-cook after 10-15 minutes at high heat, then F24 pops up on the panel and it won't restart.
Temperature display shows dashes instead of a number, like the board gave up trying to read the cavity entirely.
Oven takes way longer than usual to preheat and food comes out undercooked, then F24 appears when you try to start it again.

Can you reset a Thermador oven to clear the F24 code?

Once the probe or connector is fixed, flip the double-pole breaker off and wait a full 60 seconds. Don't flip it right back, the capacitors need time to drain so the board can reinitialize cleanly. When you restore power, it should read the new probe's resistance right away and clear the fault. If F24 comes back within a few minutes of the oven warming up, there's still something wrong in the wiring harness or the board itself.

Tools Required for Diagnosis

Multimeter (required for RTD resistance test)Phillips #2 screwdriver (probe mounting screw)FlashlightNon-contact voltage tester (confirm power is off before touching wiring)Work gloves (back panel sheet metal edges are sharp)

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

ComponentComponent Under Test

Expected Range1080–1095 ohms

ConditionIf Open (OL) or infinite, replace component.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
RTD temperature probe00486348 · $25–$45	00486348	$25 – $45

Frequently Asked Questions

What resistance should a Thermador oven temperature probe read?

A healthy Thermador RTD probe should read almost exactly 1,080 to 1,095 ohms when the oven's cold. As the oven heats up that resistance climbs, hitting around 1,385 ohms at 212 degrees F. If you're testing it and see anything way off, like 500 ohms or 2,000 ohms, the sensor's definitely your problem. In my experience they usually fail completely open, so your multimeter will show OL rather than just a weird number.

Does Thermador use a thermistor or an RTD probe?

Thermador uses high-end RTD sensors, not basic NTC thermistors. Most budget ovens start at around 10,000 ohms with a thermistor. If you try to drop in a standard $15 universal oven sensor, your Thermador's going to throw F24 immediately because the resistance values don't match what the control board expects. Always get the genuine Bosch or Thermador part number 00486348 to make sure the board can actually read the temperature signal.

Can I fix F24 without a multimeter?

You can try the visual approach first. Sometimes the harness just falls off the back of the probe, or the wires get pinched, and you can spot it without any tools. If you see a disconnected plug or obvious damage, you might fix it for free. But honestly, since the probe only costs around forty dollars, I always recommend testing it first so you're not just throwing parts at the problem. A $20 multimeter pays for itself on the very first repair.

F24 appears only sometimes during cooking. Is the probe failing?

Classic sign of a heat-sensitive break. As the metal inside the probe expands from heat, a tiny crack in the wire opens up and causes an intermittent F24. I also see this when the connector on the back of the oven is slightly loose, making and breaking contact as the oven fan vibrates. If it happens mid-cook, check that rear connector plug first, but be ready to replace the probe. It's almost certainly on its way out.

Can I use my Thermador oven at all when it's showing F24?

No, and you really don't want to. The whole point of the F24 lockout is that the board doesn't know what temperature the oven's running at, so it can't stop it from overheating. I've seen ovens push past 600 degrees because a failed sensor let the board keep calling for heat with no feedback loop. Don't try to cook through it or just reset it and hope it clears. Fix the probe first, then cook your dinner.

Related Thermador Oven Error Codes

Code: HUBThermador Oven Error Codes: Complete F-Code Reference for Wall Ovens and Ranges Code: PROBEThermador Oven Probe Error: Temperature Sensor Disconnected or Failed Code: F34Thermador Oven F34 Error Code: Control Board Relay Fault Code: F7Thermador Oven F7 Error Code: Control Board or Door Switch Fault Code: F64Thermador Oven F64 Error Code: Control Board Failure

Same Fix Works on These Brands

Thermador shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience F24 Errors

This repair applies to most Thermador ovens with this error code. Common model numbers include:

ME302ES, ME272ES, MED272JS, MES301HP, POD301J, POD302W, POD301LW, PRD486WDHU

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 14, 2026