Thetford · Catalog Reference
Thetford 639700
Kit Thermister
639700 is the Thetford part number for the kit thermister. It is printed in Thetford’s own parts documentation, which we hold a copy of and link below.
Current eBay listings for Thetford 639700
Search eBay for Thetford 639700eBay carries exact OEM numbers, discontinued parts and old stock that general retailers drop, which is usually where a part this specific turns up.
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Also search Amazon for this part number
Catalog Reference: this number appears in manufacturer documentation, but model compatibility has not yet been confirmed.
Search Amazon for Thetford 639700This is a search, not a checked product listing. As an Amazon Associate I earn from qualifying purchases.
Thetford says to use 638391 instead
Thetford marks this number with “USE 638391” on its own parts list, which is the manufacturer telling you 638391 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: 638391
Which parts lists carry this number
It appears on the parts list for the N7/N8 POLAR Series.
Where this comes from
- Document
- Thetford parts list for N7/N8 POLAR SeriesPL_N7N8_ICEMAN_639735_20240820.pdf
- Published by
- Thetford
- Retrieved
- 2026-08-28
- File checksum (SHA-1)
43f5ed0dbbcdea6ac598ea1da276ccbfcb2f2b23
What we have not checked
We can show you that 639700 is a real Thetford number, what Thetford calls it, and which parts lists carry it. Model compatibility has not yet been confirmed. That depends on your model year, build date and what is actually installed, and we do not publish a compatibility claim until we can show it in the manufacturer’s own document.
Current marketplace inventory
Listings from eBay
These results match your search terms. Camper Replacement Parts has not yet confirmed compatibility for this part.
Checking current eBay inventory…
Camper Replacement Parts is not the seller. Price, shipping, stock and item condition are set by the eBay seller and can change at any time. We may earn a commission if you buy through these links.