Temperature variations throughout hatch

[CorralitosSunflower]

I am using an older Lyon Turn-X incubator. I set it up a day early, got the temps about right but the thing is that it seems to gradually increase in temp. throughout the day. Never does it drop down unless I turn the dial so it can't have anything to do with the outside temp. I got shipped eggs and let them set for 24 hrs trying to get it to stay totally constant and finally put the eggs in. I have been monitering it very closely and generally speaking it has varied from 98.5 to 101.5. I do my very best to keep it at 99.5 but it is hard if I am out of the house. Once I came home to find it at 103

but judging from how gradually it increases it wasn't that hot for to long (or so I hope). If this continues is my hatch doomed? I am hoping that if I can keep it in the range from 98.5 to 101 everything will be alright, what do you think?

 

[debilorrah]

If it is only a breif period of a spike, which 103 is a teeny pike, they will be fine!

 

[pgpoultry]

As long as the spike was an isolated incident and the period of high temp not prolonged, you should be OK. Under momma their temp. varies a bit depending where they are in relation to her brood patch, but then the temp. will tend to be a bit low rather than a bit high,
Good Luck,
Sandie