Panasonic NN-CD989S Convection Microwave Review

Panasonic NN-CD989S Convection Microwave Review

Before we get into the details of this Panasonic NN-CD989S Convection Microwave review, let’s just get an important detail out of the way – this is the most expensive domestic convection microwave we’ve ever reviewed, and it’s not really worth it.

In fact, it is more than 5 times more expensive than our top pick for the convection microwave oven category, the Cuisinart CMW-200.

If you want to view other recommended convection microwaves, take a look at the best convection microwave ovens in 2017 instead.

With that said, if you are still interested in the Panasonic NN-CD989S convection microwave, read about our experience with the model below.


Features of Panasonic NN-CD989S Convection Microwave


Measuring at 23.8″ (L) x 19.4″ (W) x 14.8″ (H), this convection microwave oven occupies a larger footprint than most other models, but at the same time it also houses a larger interior at 1.5 cubic feet.

In comparison, the more popular models like the Cuisinart CMW-200 and Samsung MC12J8035CT provides only 1.2 cubic feet of internal capacity.

It is equipped with humidity sensors, and also the inverter technology that allows food to be microwaved with constant, lower-powered beams instead of bursts of high-powered microwaves beams. This prevents uneven cooking burnt food surface.

View the full operating manual if you want to know about the nitty-gritty.

prosHigh Cooking Power

While the other models feature 900W or 1000W heating elements, the Panasonic NN-CD989S chose to go with a 1100W element to cut short on cooking time and pre-heat time when it’s used in combination with convection cooking.


4-in-1 Cooking Functionalities

Keep in mind that this is a convection microwave oven, which combines the functionalities of both a microwave and convection oven into a single appliance. The Panasonic NN-CD989S offers 4 cooking modes:

Microwave, Bake, Broil and Combination Cooking

  1. Microwave: Used for defrosting, cooking or reheating in a matter of minutes. No pre-heating is required.
  2. Bake: Hot air is circulated in convection mode. Bake and brown cakes, pies and pizzas like a traditional convection or toaster oven.
  3. Broil: Another function in convection mode, the broiling mode forces heat quickly into the food to seal in juices and flavor. Useful for roasting meat.
  4. Combination Cooking: Combining the speed of microwave with the baking and browning capabilities of convection, this mode cuts down on cooking time significantly while retaining the evenness of convection cooking.

prosInverter Technology

Patented by Panasonic, the Inverter Technology provides a consistent stream of microwave to heat food instead of pulses of high energy beams which may lead to uneven cooking and burnt surface.

Even though we have achieve desirable results with the Inverter mode, we found that other good convection microwave ovens can achieve pretty much the same results using different power levels or combination cooking.

prosFull Stainless Steel Finish

While other models may cut down the production cost by using plastic material on door handles or buttons, the Panasonic NN-CD989S has opted for full stainless steel construction, both inside and out.



Sprinkled with advanced features and solid construction material, the Panasonic NN-CD989S is bound to perform well. Here are some advantages that we liked with our review model:

prosRoomy Interior

As mentioned earlier, the Panasonic NN-CD989S convection microwave has an internal capacity of 1.5 cubic feet, which is larger than the usual 1.2 cubic feet found in most other models.

While 0.3 cubic feet does not sound like much, it actually accommodates a much larger turntable (measuring 15″) compared to the 12″ found in its smaller competitors.

While both turntables can accommodate a full-sized chicken without any problem, the 15″ turntable is much more convenient when it comes to preparing food for a larger family.

prosCombination Cooking is Brilliant

We’ve had a convection oven and a separate microwave oven, and sometimes we wished we could have a shorter preheat time on the convection and tastier food from the microwave.

Well, the Panasonic NN-CD989S combined the best of both worlds into one appliance, and that is actually true for any good convection microwave ovens out there.

The difference that sets this model from the rest is that, with a large 15″ turntable, we enjoyed stuffing the entire 14″ pizza into the oven and have an extra crispy pizza within minutes.


Sensors and Convenient One-Touch Cooking

Panasonic put quite a bit of emphasis on the Genius One-Touch Cooking in their advertisements, and it is powered by the humidity sensors installed in the convection microwave oven.

The One-Touch cooking eliminates guesswork by automatically setting the power levels and adjusting cooking time.

This is enabled by the using the sensors that measure the amount of steam produced during cooking, which signals the microprocessor to automatically calculate remaining cooking time with the appropriate power levels.

While using this mode, refrain yourself from checking the cooking progress halfway by opening the door. Once you open the door, steam escapes and One-Touch cooking becomes wildly inaccurate. This can lead to severely overcooked food.

prosKeep Warm Feature

Sometimes we just don’t have time to consume heated food right away, and the Panasonic NN-CD989S takes advantage of its Inverter Technology to deliver a constant stream of low powered microwave beams to keep food warm.




While there are a lot to like about the highly versatile convection microwave oven, there are some highly prohibitive aspects that keep us from recommending this model to our readers.

consExtremely Overpriced

We have tested and reviewed 10 popular convection microwaves, and this is the most pricey model out of all of them.

The second most expensive model is a few hundred dollars cheaper, and we simply can’t find any unique feature that puts this model significantly more expensive than the rest of the competitions.

consRisk of Fire Hazard

While we did not encounter any safety issues during our relatively short testing period, multiple users have reported fire hazard and burnt smell coming out from their oven just after years of use.

Some users reported that the oven started smoking very badly after just a few months of use, while others reported that their units caught fire within years of purchase.

And they don’t appear to be isolated incident, with many users reporting the same safety concerns.

This is unacceptable for such an expensive appliance (or any kitchen appliance for that matter), and for this reason alone we cannot recommend this convection oven to our readers.


The Bottom Line


While the Panasonic NN-CD989S performed well and produced good results during our testing period, we do not recommend this model due to its extremely high price tag and the risks of causing fire hazards.

If you are looking for an affordable and reliable convection microwave oven, we strongly recommend that you go for the Cuisinart CMW-200 instead.



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