How to Use a Microwave Temperature Probe Correctly

What a temperature probe does

Some microwave ovens include a food thermometer called a temperature probe. The probe plugs into a jack in the oven cavity, and its thin metal tip sits inside the food. As the oven runs, the probe reads the internal temperature and can stop cooking or lower the power when the food reaches the target you set.

This is different from sensor cooking, which uses moisture or vapor to estimate doneness. A probe measures the food directly, so it is useful for meat, poultry, casseroles, and other dishes where final temperature matters. The FDA says color and texture are unreliable indicators of safety and that using a food thermometer is the only way to be sure meat, poultry, seafood, and egg products have reached a safe minimum internal temperature. Microwave ovens are also regulated by the FDA as radiation-emitting electronic products, but the probe's main job is food safety.

When you are comparing ovens, the probe is just one feature. Some models use sensor cooking instead, while others include both. The temperature probe explained article gives more detail on how the feature works across different oven types.

Where to place the probe

For whole cuts of meat, insert the probe tip into the thickest part of the muscle, away from bone, fat, or gristle. For ground meat patties or meatloaf, place the probe in the center of the thickest portion. In a casserole or leftover dish, the center is usually the last area to heat, so position the probe there without pushing it through the bottom of the container.

Small and irregular foods can be harder to read. If you are cooking several pieces, probe the largest piece and rotate the dish as the oven directs. The FDA advises covering food, stirring, and rotating for even cooking, and if there is no turntable, rotating the dish by hand once or twice during cooking.

Keep the probe away from the oven's interior walls, the turntable, and any metal rack unless the manual says otherwise. Because microwaves heat the outer part of a food first, a probe that touches the container or the oven can read the temperature of the container instead of the food. You can also use the probe with microwave safe containers that are suitable for the oven.

Target temperatures by food

Set the target temperature before you start, or choose a preset that asks for a probe. Use the FDA safe minimum internal temperatures from the table below. If the oven's probe reads lower than the target after standing time, continue heating in short intervals and check again.

Always use standing time

The FDA says standing time is part of microwave cooking. It completes the cooking, so do not skip it just because the probe reached the target. If your oven stops automatically when the probe hits the set temperature, leave the food in the oven or cover it loosely for the rest time recommended in the recipe or on the oven's display.

After standing, you can use the probe again if it is still inserted, or you can check with a separate food thermometer. For whole cuts that need a 3 minute rest, the temperature can continue to rise during that pause. This is also a good time to stir soups and sauces to equalize the temperature.

Common probe mistakes to avoid

Most probe errors come from placement, not the probe itself. The probe is only accurate when it sits in food and not against a surface that heats differently. If your results are uneven, check these common mistakes.

• Inserting the probe through the food into the dish, which gives a false reading.
• Placing the probe near a bone, large pocket of fat, or the edge of a thin piece.
• Using a probe target lower than the FDA safe minimum for that food.
• Removing the food immediately without standing time.
• Letting the probe touch the oven cavity, turntable, or rack during cooking.
• Covering or wrapping the probe connector in foil or leaving it under a metal lid.

Clean the probe after every use

After cooking, let the probe cool before handling. Remove it from the food and wash only the parts the manual says are safe to get wet. The connector end and the cable usually should not be immersed. Dry the tip before storing it.

Built-in probes are not all dishwasher safe. Check the owner's manual for cleaning instructions, and inspect the cable for cracks or wear. If the probe appears damaged, do not use it until the manufacturer's instructions say it can be replaced.

Do you need a probe in your next microwave?

A temperature probe is most useful if you cook raw meat, poultry, or fish in the microwave. It also helps with reheating dense leftovers and casseroles to a safe 165°F. If you mostly heat drinks, defrost, or use sensor presets, a probe may be less important.

When you are shopping, check the spec sheet for a temperature probe if that is what you want. Some countertop microwaves include it, as do over-the-range models. Higher-power models such as those in the 1200 W or more guide are also worth comparing.

What to pick for your use

Questions

Where should I insert a microwave temperature probe?

Place the tip in the thickest part of the food, away from bone, fat, gristle, and the bottom of the dish. In casseroles, the center is usually the last area to heat, so put the probe there.

What temperature should I set for chicken?

Set the probe to 165°F for ground poultry, poultry parts, whole poultry, and stuffing. This is the FDA safe minimum internal temperature for poultry.

What temperature should I set for ground beef?

Set the probe to 160°F for ground meat. Whole beef steaks and roasts can be set to 145°F with a 3 minute rest time.

Do I need standing time if the probe reaches the target?

Yes. The FDA says standing time completes the cooking, so allow the recommended rest time before serving. For whole cuts, the temperature can continue to rise while the food rests.

Can a probe replace sensor cooking?

No, they work differently. A probe reads the food's internal temperature directly, while sensor cooking detects moisture or vapor in the oven. See sensor cooking vs temperature probe for a fuller comparison.

Is it safe to leave a probe in the microwave while cooking?

When the probe is designed for that microwave, yes. Keep the probe away from the oven walls, turntable, and metal racks, and follow the manual for cleaning and replacement.