Thetford parts reference
Thetford 639018
Temperature Controller/Sensor
639018 is the Thetford part number for the temperature controller/sensor. It is printed in Thetford’s own parts documentation, which we hold a copy of and link below.
Thetford says to use 639857 instead
Thetford marks this number with “USE 639857” on its own parts list, which is the manufacturer telling you 639857 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: 639857
Which parts lists carry this number
It appears on the parts list for the DE0061 Series.
Where this comes from
- Published by
- Thetford
- Retrieved
- 2026-08-28
- File checksum (SHA-1)
3050b13ebea5a432a9698848631a2f59dc537f22
What we have not checked
We can show you that 639018 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 That depends on your model year, build date and what is actually installed, and we do not publish a fitment claim until we can show it in the manufacturer’s own document.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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