Thetford parts reference
Thetford 638393
Kit Service Thermistor Replacement
638393 is the Thetford part number for the kit service thermistor replacement. It is printed in Thetford’s own parts documentation, which we hold a copy of and link below.
What this number replaces
If you were looking for 629408, this is the number that part points to. Thetford marks it with “USE 638393”, so 638393 is the one to order.
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 638393 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 That depends on your model year, build date and what is actually installed, and we do not publish a fitment claim until we can show it in the manufacturer’s own document.
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