Thetford parts reference
Thetford 629491
Thermistor-Rod/Air
629491 is the Thetford part number for the thermistor-rod/air. It is printed in Thetford’s own parts documentation, which we hold a copy of and link below.
Thetford says to use 638392 instead
Thetford marks this number with “USE 638392” on its own parts list, which is the manufacturer telling you 638392 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: 638392
Which parts lists carry this number
It appears on the parts list for the 2117 Series.
Where this comes from
- Document
- PL_2117_630367_20231019.pdf
- Published by
- Thetford
- Retrieved
- 2026-08-28
- File checksum (SHA-1)
646263f6071845ff185770ccb487a45830e0bbcc
What we have not checked
We can show you that 629491 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 That depends on your model year, build date and what is actually installed, and we do not publish a fitment claim until we can show it in the manufacturer’s own document.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
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