Frigidaire dishwasher model mdb421rfs3 will not start

There are a few things to check. Do you have power and water turned on to the dishwasher? During the dishwasher installation, these should be off for safety. Is the CL (control lock) enabled? To disable this, press and hold Delay Start for about 3 seconds.

Please check the model number. I suspect you may have a Frigidaire FGID2466QF5A. In that case, the direct link to the owner's manual is http://manuals.frigidaire.com/prodinfo_pdf/Kinston/A05788501Cen.pdf . The installation guide is http://manuals.frigidaire.com/PDFnotFoundCheck.asp?path=ftp://ftp.electrolux-na.com/ProdInfo_PDF/&folder=Kinston&PDFtype=Install&PDFfile=154427301H.pdf&model=FGID2466QF5A . Most Frigidaire manuals are available through the support page: http://b2b.frigidaire.com/support/manuals.asp . I truncated the model number to FGID2466 for this search.

I hope this helps.

Cindy Wells

How to Fix a Dishwasher That Won't Start ' Dishwasher Repair

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Dishwasher has no power - YouTube

? 4:38
https://www.youtube.com/watch?v=pp5P3Cvy9qA
Mar 26, 2010 - Uploaded by ApplianceHelpOnline
If your dishwasher has no power watch this video. For more free videos,parts,service manuals, free expert ...

What to Do When the Dishwasher Won't Start -

Below is the link, you can download it
http://www.manualslib.com/products/Frigidaire-Fghd2433kw1-2885301.html

• Find the "Start/Cancel" button on the dishwasher's control pad. This button is located on the far-right side of the pad on most Frigidaire Gallery dishwasher models.
• 3 Press the "Start/Cancel" button to clear the "PF" error code. Resume using the dishwasher as normal. You may have to reselect and start your cycle from the beginning.
  

I had the same issue. I unplugged the dishwasher and plugged it back in. Bam! It's working fine now.

Most likely a control board problem

It is in a delay wash mode.
Disconnect power for 60 seconds.
Re-connect power.
Press the Cancel button.
Press the regular wash cycle and start the dw.

Model number would help alot!
to locate...Open your Frigidaire dishwasher's door and check the inner frame -- left top corner and the left and right sides --for the product label containing the model number.
or Check the inside of the door frame if you don't find the number on the inner frame.
let us know. thanks!

Hmmm...don't know why this worked, but it did. When the lights were flashing when I tried to start my Frigidaire dishwasher model#FDB1500LF, nothing would happen...just blinking lights, so I went to the house electrical panel, found the switch for the dishwasher, turned off & on again, and now the dishwasher works.
Go figure.

thank you so much for this information it was a god send