Question about Dacor DMT2420SS Microwave Oven

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Dacor DMT2420S Blank display, oven does not work

The model is a Dacor DMT2420S. The problem started as the display being scrambled. Turning power on and of accasionally would fix the problem. It then became permanent. At this point the oven was still usable. The display eventually went blank. Backlit was working. Touch screen still responding and oven still working. Now the display is still blank but the oven wont work anymore. The light turn on and off by opening/closing the door but the turntable does not spin and the magnetron doen not turn on. Is it a bad control unit? Do you have a replacement part? Thanks for the assistance

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  • Dacor Master
  • 9,047 Answers

It sounds like you need to have the control panel assembly repaired or your CPU unit replaced and you need a new bottom door switch.

We regularly repair these control units for customers nationwide by mail for $39.95 postpaid in about a week or so with a one-year guarantee.

Or you can order our exclusive modified control unit with our proprietary upgrades for $115, then if you return your defective control unit in repairable, good cosmetic condition, we'll give you a core refund of $30. It comes with a one-year guarantee. See details here.

We have the service manual and have uploaded it our site here to help you. It covers disassembly.

Also see this file.

You can order a universal type switch here for $5 postpaid.

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

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

Dacor DMT2420S Blank display, oven does not work - 2288e7c.jpg

Posted on Feb 12, 2010

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Dacor DMT2420S


That would be your waveguide cover. If damaged or discolored, the waveguide cover has been damaged by heat and must be replaced.

It protects your waveguide and magnetron from arcing due to grease and food particles.

The area of the waveguide behind the waveguide cover should be clean, and if rust or flaking is present it must be sanded, then repainted with high temperature appliance paint.

For Dacor model DMT2420S, the waveguide is part number 66345 and you can get it from The Pros here for $11.07 (subject to change).

The service manual is at my site here: http://www.microwavecontrol.com/dmt_2420_sm.pdf and the part list is here: http://www.microwavecontrol.com/dmt_2420_parts_list.pdf.

Feel free to e-Mail me at pupista@gmail.com if you need more free advice.

Sep 25, 2016 | Dacor Microwave Ovens

1 Answer

We have a Dacor Microwave DMT2420S that everything works except the Touch Screen doesn't light up.


The display board is bad, it may be part of the control PCB or it may be separate. Some are back lit and some are lit internally.

Oct 21, 2013 | Dacor DMT2420S Preference 24" Microwave...

1 Answer

The touch screen on our Dacor DMT2420S is lit, but there are no "buttons" to use to control the microwave. None of the other buttons work either.


We regularly repair these control units for customers nationwide by mail for $39.95 postpaid in about a week or so with a one-year guarantee.

We have very good success with these models.

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

Jan 30, 2010 | Dacor DMT2420SS Microwave Oven

1 Answer

Dacor Microwave DMT2420S control panel screen white


It is the CPU/display assembly that has a problem.

We regularly repair such control units for customers nationwide by mail for $39.95 postpaid in about a week or so with a one-year guarantee.

In my professional opinion, there are weaknesses in both the design and manufacturing.

Our proprietary modifications and repairs are designed to not only repair these, but prevent them failing again.

We have the service / repair manual for this model and have uploaded it to our site here for free download to help you with disassembly.

Please tell your builder about us.

Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) 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, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Jul 21, 2009 | Dacor DMT2420SS Microwave Oven

1 Answer

DACOR microwave, model DMT 2420S. Display is scrambled.


There are two options for this model:

- You can order our exclusive modified control unit (# CU440) with our proprietary upgrades for $115, then if you return your defective control unit in repairable, good cosmetic condition, we'll give you a core refund of $30. It comes with a one-year guarantee. For details, see: http://www.microwavedisplay.com/exchange.htm

- Or we can repair your existing control unit for $39.95 in about a week or so with a one year guarantee.


Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) for more information & help.

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

Jun 26, 2009 | Dacor DMT2420 1200 Watts Microwave Oven

1 Answer

Dacor DMT2420s when started makes a loud buzzing sound


The fan could have an obstuction. I have heard of tech sheets getting into the fan and causing a vibration and vibrating sound.

May 12, 2009 | Dacor DMT2420SS Microwave Oven

1 Answer

Display panel is scrambled on my Dacor DMT2420 microwave.


There are two options for this model:

- You can order our exclusive modified control unit with our proprietary upgrades for $135, then if you return your defective control unit in repairable, good cosmetic condition, we'll give you a core refund of $40.

For details, see: http://www.microwavedisplay.com/exchange.htm

- Or we can repair your existing control unit for $39.95 in about a week with a one year guarantee.


For details, see: http://www.microwavedisplay.com

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

Jan 25, 2009 | Dacor DMT2420 1200 Watts Microwave Oven

1 Answer

DMT2420s


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

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

Feel free to contact me directly.

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 06, 2008 | Dacor DMT2420SS Microwave Oven

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