I have a Farm Innovators 4250 incubator that is being a giant pain. I used it last year to incubate 4 batches of eggs and didn't have any issues with it heating and staying at the correct temp. I just got it back out and running this year a few weeks ago and it will not get up to temp for the chicken eggs I have in there. its been running for about 18 days now and occasionally I can get it to heat up to 99 or 100 degrees but it doesn't stay there for long and now its not even getting close to 90 degrees. I currently have the temp set to 150 and its not getting any where close to even 90 degrees . could the heater be bad or dead?