Incubator Temp dropped to 75

[RoosterJuice]

Hello, I made the mistake of buying a used incubator which apparently has an internal thermometer issue. Twice now it has gone down to 75ish for a few hours, once on day 4 and again today on day 8. It reads 100 but the thermometers I have inside read 75. Then when I unplug and plug in the incubator it recognizes it is at 75 and starts to climb. This is why I think there’s an internal thermometer issue. I’ll keep an eye on it but either way, do you think these eggs will survive? Thank you.

 

[gimmie birdies]

They may take longer than 21 days to hatch.

 

[ChickenCanoe]

Never trust a thermometer or thermostatic control. Chances are better than not, they will be inaccurate. Even if close, it may not be close enough for incubating.
Unless you know exactly what the temperature, you are at a loss on how to proceed.

I know of 3 extremely accurate thermometers that won't break the bank. Look for a Govee, thermometer/hygrometer combination that is perfect for incubation and reports to your cell phone.

This info may help you https://www.brinsea.com/t-PowerOff.aspx