Thetford parts reference
Thetford 637081
Kit Optical Control
637081 is the Thetford part number for the kit optical control. 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 636751, this is the number that part points to. Thetford marks it with “USE 637081”, so 637081 is the one to order.
Which parts lists carry this number
It appears on the parts list for the 2118 Series.
Where this comes from
- Document
- PL_2118_637110_022025.pdf
- Published by
- Thetford
- Retrieved
- 2026-08-28
- File checksum (SHA-1)
9e1199a334ca2e63c02f6952e9b7ff71703ec017
What we have not checked
We can show you that 637081 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 That depends on your model year, build date and what is actually installed, and we do not publish a fitment claim until we can show it in the manufacturer’s own document.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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