Thetford parts reference
Thetford 640164
User Interface Control Board
640164 is the Thetford part number for the user interface control board. It is printed in Thetford’s own parts documentation, which we hold a copy of and link below.
Thetford says to use 640089 instead
Thetford marks this number with “USE 640089” on its own parts list, which is the manufacturer telling you 640089 is what to order now. That instruction comes from the document, not from us, and not from what sellers happen to call the part.
Current number: 640089
Which parts lists carry this number
It appears on the parts list for the N10DC Series.
Where this comes from
- Published by
- Thetford
- Retrieved
- 2026-08-28
- File checksum (SHA-1)
0ab870de4f466c24cb937f91cab8252dda57550f
What we have not checked
We can show you that 640164 is a real Thetford number, what Thetford calls it, and which parts lists carry it. We have not verified that it fits your camper. That depends on your model year, build date and what is actually installed, and we do not publish a fitment claim until we can show it in the manufacturer’s own document.
Current marketplace inventory
Listings from eBay
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