Did I kill my starter?

[Weapon-X]

I made a starter last night around 6pm and plan to pitch today around 1pm.

The starter was bubbling away and would produce about a half inch of foam when I swirled it. I left it near (about 3' away) from a radiator to stay warm. Around 9pm last night I could easily get 2 inches of foam when I swirled it. I worried that it was getting too warm so I moved it a couple more feet away from the Rad.

This morning, I found the starter to have just a light layer of foam and I can barely get a half inch to an inch when I swirl it. Did I kill it by overheating it last night?

If I pitch this yeast, will I automatically be bringing in fruity esters into the batch?

 

[Pastorken]

How big was the starter and what kind of yeast?
Could be you just had a strong ferment and it burned through the wort over night. I can't see how you would have killed it without an extreme temp change like boiling it or refrigerating it.

 

[Cyclman]

Ferm could be done and the yeast was flocculating. Check the FG, if low, you're OK.