The unit sits under the heater box next to the heater blower, measures approx. 3" x 1 1/2", has a coiled spring and a bi-metal unit on one side, and four electrical connections on the other, it is covered with a metal cover with holes in it.
Any working part, new or used would be appreciated, seller would have to post part up to me as I am on the west coast of Scotland.
Thank you,
Kevin.