This page lists every known solution for the clue “Heat Source” in Crossword Challenge. Because this clue can appear in different puzzles (levels) with different required answers, we first list all the answers, then show which one appears in each puzzle below.
Heat Source Crossword Challenge Answers (All Variants)
Furnace
If more than one answer is listed, open your puzzle page below to confirm the one used there.
All Known Answers for Heat Source Clue
Where This Clue Appears
Last Checked: September 12, 2025