Crossword clue: a regulator for automatically regulating temperature by starting or stopping the supply of heat

The most common answer is thermoregulator (15 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

thermoregulator 15 letters wn-def

a regulator for automatically regulating temperature by starting or stopping the supply of heat

thermostat 10 letters wn-def

a regulator for automatically regulating temperature by starting or stopping the supply of heat