Thetford parts reference
Thetford 638278
Kit Service Fan Thermostat Replacement 1
638278 is the Thetford part number for the kit service fan thermostat replacement 1. 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 618093, this is the number that part points to. Thetford marks it with “USE 638278”, so 638278 is the one to order.
Which parts lists carry this number
It appears on the parts lists for 2 different models: 1210 Series and N61/N81 Series. A number shared across several models usually means the component was carried over between them, which is useful when the exact list for your model is not the one you can find.
Where this comes from
- Document
- PL_629923_1210_1312025.pdf
- Published by
- Thetford
- Retrieved
- 2026-08-28
- File checksum (SHA-1)
a43fbd12f0f3c5e4b64a4184c3a36ab7f812dfa5
What we have not checked
We can show you that 638278 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 That depends on your model year, build date and what is actually installed, and we do not publish a fitment claim until we can show it in the manufacturer’s own document.
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