Question about Panasonic NN-T654SF Microwave Oven

1 Answer

Turn on, but I don't har fan and it startd smoking.

I've only used it for about a total of 30 minutes of cooking. I was heating water and 2 minutes in it stopped the fan noise and started smoking. Any ideas?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Panasonic Master
  • 8,803 Answers
Re: Turn on, but I don't har fan and it startd smoking.

I would suspect a problem with the high-voltage inverter.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

I would recommend that you contact your nearest Panasonic-authorized servicer.

You can find one here:

Posted on Nov 19, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

My GE OTR Microwave Model # JVM3670SK02 overheated when I tried to cook rice for 30 minutes...two times in a row. What could be the problem?

why are you cooking rice for 30 minutes in a microwave????? the problem is that a microwave IS NOT A RICE COOKER!!!use a rice cooker or use instant rice and heat the water for 2 1/2 minutes only!! OR BURN DOWN YOUR HOUSE!!

May 08, 2015 | GE Microwave Ovens

2 Answers

I need instructions for 10in. microwave browner

Only place I've found is here: CorningWare Browner Instructions

As these dishes were designed by Corning for a 650 watt over, you can recalculate preheat and cooking times for your oven with the following formula:

650/(your oven's wattage) x (listed preheat time or cook time)

For example, for a Corning MW-9 dish, they list 4 minutes maximum preheat time. I have a 1,580 watt oven. So 650/1580 = .41 x 4 minutes = 1.64 minutes and about a minute and a half preheat. (MAX).

Mar 09, 2014 | CorningWare Microwave Ovens

2 Answers

Shut's off after cooking popcorn, only popcorn, won't restart for 15 too30min.

Sounds like the magnetron is over heating. Try putting a 4 0z cup of water in the oven along side the popcorn bag. See if this helps. Usually, the oven only runs 2 to 2.5 minutes for a bag of popcorn. You may have to experiment with the slightly different cooking time...

Oct 29, 2013 | Magic Chef CMV1000B Microwave Oven

1 Answer

How do I stop the vent fan on my Amana OTR microwave (AMV1162AAW)

see the block diagram, unppluged the machine, and disconnect only 1 wires or 2 wires and wrapping with electric tape individual.
However I will NOT recommend to do this, because the fan cool the magnetron, that emite radiation for heating the foods.
God bless you

Aug 01, 2012 | Amana AMV5164 Microwave Oven

1 Answer

WMH1163XVD seems to no be on full power. Takes 1 minute to heat up a piece of bacon

1 minute to cook a piece of bacon sounds pretty fast, really.

Try this:


The following test will provide a suitably accurate measurement of the output power of any microwave oven. Variations or errors in performing this test will produce uncertain results. If the line voltage (from the electrical outlet) is low, the magnetron output will be correspondingly low.

Equipment needed:

- Microwave safe container with 1000 mL (1 Liter) gradation.

- Fahrenheit or centigrade thermometer


Pour exactly 1000 mL (1 Liter) of cool tap water into the container. Using the thermometer, stir the water, then measure and record the temperature. For accurate results the water should be about 60 degrees F (20 degrees C).

Place the container on the center of the oven cooking shelf (do not leave the thermometer in the container and remove any metal racks), and heat the water (at full power) for 63 seconds. Use the second hand of a watch, not the oven timer.

After the heating time is completed, immediately remove the container, stir the water, re-measure and record the temperature of the heated water.

Subtract the starting water temperature (step 2) from the ending water temperature (step 3) to obtain the temperature rise.

To determine the output power in watts, multiply the total temperature rise by a factor of 38.75 if you're using a Fahrenheit thermometer or by 70 if you're using a centigrade thermometer.

If the oven is grossly underheating or overheating, then you probably have a bad magnetron.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

mini_manual_behind_grille_small.jpgdee77f7.jpgAt our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Jul 18, 2011 | Whirlpool WMH1163XVS Microwave Oven

1 Answer

Does the exhaunst fan turn on automatically when we cook or warm food items in our Samsung Microwave -- SMH 9187W?

Some interesting reading on page 8 of the owner's manual:

"Boilovers cause smoking and greasy spillovers that may ignite and spread if the vent fan is operating.To minimize automatic fan operation, use adequate sized cookware and use high heat on surface units only when necessary."

And on page 20:

"If the temperature becomes too hot around the microwave oven, the fan in the vent hood will automatically turn on at the LEVEL 2 setting to cool the oven. The fan will automatically turn off when the oven has cooled down sufficiently. This is an automated process and cannot be turned off. The fan may stay on for 30 minutes or more after the cooktop and microwave controls are turned off. The Vent Fan will only operate in 1~4 levels modes while the microwave is working."

"Using the Vent delay off button
1. Press the Delay Off button once to turn the fan off after 1 minute.
2. Press the Delay Off button twice to turn the fan off after 3 minutes.
3. Press the Delay Off button three times to turn the fan off after 5 minutes.
4. Press the Delay Off button fiour times to turn the fan off after 10 minutes.
5. Press the Delay Off button five times to turn the fan off after 30 minutes."

If for some reason you don't have your owner's manual, you can still download it free here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer

Jan 01, 2011 | Samsung Microwave Ovens

3 Answers

I inherited a 1986 J.C. Penney Microwave and can't figure out how to program most of the features. I need an operating manual or a gnome.

The clock must be set before you can use the microwave. When you plug it in, it should read all zeros. Enter the time, and press "Clock Set." Time is in 12-hour format. There is no daylight saving time.

For basic microwave use:
1. Press "Power."
2. Press the keypad corresponding to the desired amount of power, e.g., "High," or "Defrost." (The numbers on the keypad have little words on them, like "Warm," "Med," and "High".)
3. Press "Time."
4. Enter the desired cooking time, e.g., "1-0-0" will be 1 minute; you could also do "6-0" for 60 seconds. You can do as little as 1 second, up to 99 hours 59 minutes. "1-0-0-0" would be 10 minutes. "2-0-1-2" would be 20 minutes 12 seconds.
5. Press "Start."

NEVER operate the microwave when it is empty. Put at least a glass of water in it. Never put a glass in it empty; make sure the glass has something in it, like water. Be careful when taking out a glass of water that's been heated; the water has been known, in rare instances, to "explode" and severely scald people.

It is okay to use the approved metal rack (it's coated with ceramic to prevent arcing) when using the microwave in microwave mode. Of course, the metal rack is also fine for use in the convection/combination mode.

"Defrost" cycles between microwave and nothing, microwave and nothing, microwave and nothing. You can hear the cycles. If defrost takes too long, try "Low." Try to avoid using "High," as it kills most nutrients in the food. Opt for "Medium" for slightly longer time; it'll be more evenly heated and healthier. Some things, like popcorn, require "high" power.

To stop the microwave in the middle of cooking, simply open the door. (There's no such thing as microwaves escaping the oven and bouncing around the kitchen and zapping you. I have a microwave tester, and the moment you open the door, all microwaves dissipate; the reading at the door is "Zero" once it's opened.) Or, press "Cancel." If you open the door, you may test the food, and if it needs further cooking, you may close the door and press "Start," and it will resume where it left off. If you're all done, just press "Cancel."

There is no way to disable the 5 beeps at the end of the cycle. If the baby is sleeping and you don't want to hear the beeps, simply open the door right before the beeps when the countdown is at zero. Pressing "Cancel" will give you one beep.

If you have the Combination feature, that cycles between microwave and convection heat, giving the best of both worlds (cooking inside with microwaves and outside with convection), for things such as a whole meats.

To use Combination:
1. Press "Combination."
2. Consult the chart on the microwave (below the keypad) and choose a number from 1 to 4, depending on what type of food you're preparing (i.e., lamb, pork, etc.).
3. Press "Time."
4. Enter the desired time, using the method described above.
5. Press "Start."

The Convection feature simply blows hot air across the food, at the temperature and duration that you set. It's a great way to toast slices of bread for the whole family at once, or bake a pizza.

To use the Convection feature:
1. Press "Convection."
2. Choose the temperature (the degrees are printed on the keypad, such as "350 degrees."
3. Press "Time."
4. Enter the length of cook time, using the method described above.
5. Press "Start."

Be sure to cover foods (with a paper towel or suitable plastic cover) that are prone to splattering. Don't let foods explode and get up into the motor. Clean the inside regularly with a soft sponge and mild detergent, NOT harsh or abrasive chemicals like Comet. Then rinse the soap off with a clean sponge.

Be sure to close the door firmly before cooking, but don't slam it. Slamming it will wear out the latching part, but being too gentle in closing the door may cause the safety switch to not engage, and the microwave won't work (it'll count down and the light will turn on but the motor won't run).

Note: the Convection feature uses more wattage than the microwave counterpart. The volts and amps are listed in the door jamb; multiply them together and you get total watts (although the actual amount will vary depending on your "power" settings).

Aug 07, 2010 | Microwave Ovens

2 Answers

JVM1540DN1WW leaves food cold

Put in one cup of water at 2 1/2 minutes on high -- it should boil.

The fan slowing down is normal becaue the magnetron, which does the heating and, which pulls about 10 amps, will drop the voltage across the fan and slow it down.

What type of circuit was your old microwave using? Was it a circuit dedicated to the microwave?


Aug 22, 2009 | GE Spacemaker JVM1540 Microwave Oven

1 Answer

Maytag over the range microwave

First, is the internal cooling fan running when you cook?

The cooling fan (not to be confused with the hood / exhaust / vent fan) is critical to keeping the magnetron from overheating.

The magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

This can be due to a failed cooling fan or a failing magnetron.

One way to test this is to place a cup of water inside and cook on the lowest power setting for 2 minutes and see if it makes it all the way through.

Then try it again on full power.

If it's within the magnetron portion of the warranty (usually 5-9 years) but out of the original full warranty (usually 1 year), then your manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.

If you or someone you know wants to look into this, we have critical safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa.

We even have a video on our site that shows you how to safely & easily remove the control panel assembly in less than 5 minutes so you can check out your oven.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

We're happy to help you and we'd appreciate your thoughtful rating of our answer.

Jul 21, 2008 | Microwave Ovens

1 Answer

Mircowave works, exhaust door opens, fan stop working

From looking at the owner's manual, it looks like the vent fan is only supposed to come on when the internal temperature of the microwave gets too high OR when you press the VENT FAN pad. Here are a couple of fan-related excerpts from the owner's manual, which can be found here: (or the better URL here: Automatic Fan An automatic fan feature protects the microwave from too much heat rising from the cooktop below it. It automatically turns on if it senses too much heat. If you have turned the fan on, you may find that you cannot turn it off. The fan will automatically turn off when the internal parts are cool. It may stay on for 30 minutes or more after the cooktop and microwave controls are turned off. - Vent Fan The vent fan removes steam and other vapors from surface cooking. Press VENT FAN once for high fan speed, twice for medium fan speed, a third time for low faw speed, or a fourth time to turn the fan off. Press the VENT FAN BOOST pad for extra fan speed. - Hope this helps.

Oct 31, 2006 | GE JVM1840 Microwave Oven

Not finding what you are looking for?
Panasonic NN-T654SF Microwave Oven Logo

68 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

8803 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers


Level 2 Expert

224 Answers

Are you a Panasonic Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides