If you just set them and it wasnt that way long probly they will be ok. Candle them in a week and see if there are babies in there. Usually when you set eggs the temp drops for a little bit cuase the eggs are cooler and have to come up to bator temp.
Yes I never turn the bator up till I give the eggs time to come up to bator temp at least 4 or 5 hours longer if you have lots of eggs , it wont hurt them to be a little low if you wait to see but temp spikes will if they get to hot to long. Good luck , hopefully they will be fine.
I'm sort of in the same boat. I set some Coturnix quail eggs that were due to hatch this week. Well my incubator thermometer - the one I received with the bator - worked fine until I took out the turner and increased humidity in preparation for the hatch. It took my bator about 4 hours to get up to 99 degrees according to my thermometer. Then once I regulated the thermostat the thermometer read 86 degrees. I thought this isn't right so I placed another liquid thermometer in there. Well this one read 105 degrees, way too high, so I went out and bought a digital thermometer. It read 99-100 degrees, exactly where I wanted it to be. The old thermometer still read 86. I'm hoping the digital one is more accurate because that is the one I'm going by. I should know by the end of this week if the eggs hatch or not. Bad time for the thermometer to go faulty!