Quote Originally Posted by ljdm1956 View Post
What is the name of the part you are talking about, Paul?
There's a generalization that electronic components double their failure rate for each 10C (18F) above 50C (122F). This figure varies by part, and some parts are designed specifically for harsh environments.

Electrolytic capacitors (the ones that look like cans, often blue) have a gel inside that's susceptible to boiling out (over temp) or drying out (if unused for years). They're probably the most sensitive component to heat.

If the temp is kept in check, leaving a device on prevents thermal stress caused by heating and cooling cycles, which is a leading cause of failure in electronics. But then you need to weigh the added lifespan vs the power bill.

Cheers,
Richard