I would have left them alone. She didn't lay 8 eggs in less than 10 days so she was likely assembling a clutch before she started sitting. The eggs can cool all the way down to near freezing before affecting their ability to hatch as long as incubation hasn't started.She laid 8 eggs in the shade a few days ago and I haven’t seen her checking on them or warming them since then. The location she chose was dropping into the low 80’s. I have taken them inside and put them inside a towel on a heating pad. Yesterday the max temperature achieved was 104. It shuts off intermittently and the temperature drops into the 90’s. This is definitely an experiment in progress.
They wait till they have a clutch before they start sitting 24/7.
Now that you've put them on a heat pad, cell division has begun.
Where are you getting that 104F reading? On the pad, on the egg, or?
Going from the 90s to 104 continuously will certainly doom the hatch.
No offense but it sounds like an experiment in how to ruin 8 peafowl eggs.