Question about Microwave Ovens

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Polti Vaporella 600 not pumping tested pump OK so either main PCB or Reed switch Fault ? Bridged reed switch no go No LED's lit on PCB power running at 240v any ideas or wiring diagrams for PCB Please ?

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  • Microwave Ovens Master
  • 12,223 Answers

Wiring diagram will be difficult. You must search on internet by try to get some one.
You must test the input voltage for to see if there are voltage, test the fuse or c.breaker for open or faulty and replace or repair. and try again. However will be a Great idea, if your Resolder all the colder union PCB from oxide,bad contacts.etc., and try again.
God bless you

Posted on Oct 17, 2013

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Posted on Jan 02, 2017

banar
  • 26 Answers

SOURCE: Whirlpool MH6151XHT-1 - No Power - Stumped

First change all the fuse and check whether it works or not, if it does not work than as per your finding the secondary transformer could be the issue, the secondary transformer tap down the voltage fro 230-240/110 to required control board voltage. the best thing if the unit is opened then the right problem can be found but as per your description either fuses are faulty or the secondary transformer.

Posted on Dec 12, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: No lit LED, No panel control. Vent fan, running

We regularly repair these control panels for customers nationwide with our guaranteed $39.95 service.

Full details of our service are at http://www.microwavedisplay.com.

Feel free to contact me directly for more information & help.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Posted on Sep 06, 2008

  • 5 Answers

SOURCE: i have a polti steam

Steam irons are built to run on tap water, there will not be any problems whatsoever unless the water is hard, which may leave sediments inside the iron after evaporation.

Posted on Feb 28, 2011

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My microwave has no power,I have checked all fuses, switches and thermostats, i've replace the main control pcb. still no lights or display


pwr comes in, goes thru fuse to transformer which powers pcb and mag. pcb is not getting pwr. chk ur installation and the output from the transformer

Jan 25, 2016 | Microwave Ovens

3 Answers

Runs when door is closed,stops when open!Checked the three door switches;all good.The mw is 5 years old so anyone have suggestions as i would be thanking U in advance


It is possible that a relay on the control board has stuck in the closed position. You can try tapping the relays on the main control board and this sometimes breaks them free. It still may be one of the door switches but I would suspect the control board or possibly a stuck start pad on the touch panel.

Apr 24, 2015 | Cuisinart CMW-100 Microwave Oven

1 Answer

I have a NNSD297 Panasonic over the range microwave oven. First the unit had power, clock , timer, fan was working; except after hit the start button, maybe 2 secs looked like working then stops operating....


Make sure that the program controller is working if not check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if the switch contact are not good then it will not trigger the processor to switch on the waveguides. If the lights or fan work without any display or action of program being triggered to start then it can be a possible fault on the main board or the processor. Sometimes insect secretion can short the board and display panel and so the processor can work in such an erratic manner. If so clean, solder and reset the board. Now identify the parts by clicking this link: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html

If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron. Check this link to know how a microwave works:

http://www.espares.co.uk/advice/microwave/a/5/1443/how-a-microwave-oven-works.html

Feb 11, 2013 | Panasonic Microwave Ovens

1 Answer

No lights - Acts Like It Has No Power At All


see the diagram and pictorial and proceed with common sense:
1) test the fuse for open or band contact with VOM,see the diagram attached how to do it
2)check the switch door hook or door release button,when they are broken they do not touch the switch, and will NOT start. test for open
see the diagram
7_17_2012_12_56_50_pm.gif7_17_2012_12_57_31_pm.jpg7_17_2012_12_58_02_pm.jpg

Jul 16, 2012 | Microwave Ovens

1 Answer

Krups XP7200: when I turn it on, after a few seconds all LED flash and error code 3 is displayed. Nothing can be done


The fault can be related to the program controller, so check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if the switch contact are not good then it will not trigger the processor to switch on the waveguides. If the lights or fan work without any display or action of program being triggered to start then it can be a possible fault on the main board or the processor. Sometimes insect secretion can short the board and display panel and so the processor can work in such an erratic manner. If so clean,solder and reset the board.

Now identify the parts by clicking this link: http://www.espares.co.uk/advice/microwave/a/5/141/identifying-microwave-parts.html

If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron.
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off. Check the wave guide covers, if food had deposited
then it must be checked or replaced.
See link: http://www.espares.co.uk/advice/microwave/a/5/1146/how-to-replace-a-microwave-guide-cover.html

Now keeping clear of the microwave, switch on, use a cup of water inside to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.
If there is heating without any issues, you can use the microwave safely

Thank You for using FIXYA.

Aug 24, 2011 | Microwave Ovens

1 Answer

I have a polti steam iron 600 do i have to use distiilled water or will tap water be ok thanks


Steam irons are built to run on tap water, there will not be any problems whatsoever unless the water is hard, which may leave sediments inside the iron after evaporation.

Feb 28, 2011 | Microwave Ovens

1 Answer

It always say F7


HI. This is, essentially, a inverter fault error cofe(F7). This code will indicate that there is an electrical circuit malfunction located at the L1 an neutral junction point on the main inverter board, itself. I will post a quick check point list below to guide you through the necessary troubleshooting that is needed at this time. If all check points below check out ok, simply replace the inverter board.

Check Points:

1. Check door, hinge and cavity front alignment and adjust
as needed.
2. Check the operation of all interlock switches.
3. Check the thermal fuse for the magnetron.
4. Check all Cavity Thermostats for closed circuit.
5. Unplug the oven for at least 40 seconds. If removing power for that length of time solves
the problem:
A. Check the Cooling Fan for proper operation or
blockage
B. Check the resistance of the magnetron thermostat.
It should be 0 Ohms, replace if necessary.
6. Verify that the control cable to the 1100 watt inverter
is properly connected to plug P2 on the display PCB
& Adjust or Reconnect
7. If interlock switches operate correctly, replace 1100W
inverter.
8. If problem persists, replace the main control PCB.

Dec 02, 2010 | Whirlpool MH2155XP Microwave Oven

2 Answers

The fan runs when the door is open just like it does when it's running. When the door is shut and not running the fan is off. I opend/shut the door 3 times firmly like the GE rep. told me to but it still...


Hi.

Disconnect the oven from power and allow cooling down. Most GE have temperature controlled fan system.

The Fan is controlled by main pcb and powered along the line passing through the door lock switch, with circuit supplying power to the magnetron and turntable motor.

The fan is also operated directly by the control board.

If the turntable was also running, then the door switch is shorted. In that case the magnetron may be working as well, better not to start the microwave oven.

If only the fan is running, then the main pcb must be replaced, or the damper motor relay must be replaced.

Call GE and arrange repair, the unit is faulty.


Apr 26, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

The turntable on our Whirlpool VT256 oven has


it could be 1 of 3 things here 1 the coupling under the plate mat be warn or broken inside so the shaft of the motor maybe turning but not turning the plate take the plate out and put a cup of water in the unit and see if coupling moves without the plate if not thn see if you can remove the coupling and repeat the test if you can see the motor shaft moving thn u need a new coupling, if not thn you may need a new motor to test th motor you will need to turn the unit on it side remove the plate first on the underside on the unit round where motor is you will see a plate this will round or square you need to cut this away to expose the motor dont throw it away as you need to refit if after, it turns round and you screw it back on, when you have found the motor remove and replace it albeit the motor is powered by the pcb it is unlikely to be the pcb as the motor runs all the time so they do ware out also do look to see if your unit has a turn table switch off button on the controls or in the manual hope this helps and dont forget to unplug ur unit from the mains.

Oct 17, 2009 | Microwave Ovens

1 Answer

No lit LED, No panel control. Vent fan, running


We regularly repair these control panels for customers nationwide with our guaranteed $39.95 service.

Full details of our service are at http://www.microwavedisplay.com.

Feel free to contact me directly for more information & help.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Aug 14, 2008 | GE JVM1850 1000 Watts Microwave Oven

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