My DH bought me a GGF 1202 incubator and it had been running fine at constant temp and humidity. It had been running for about 5 days before I decided to put eggs in. This morning I went to check on my 3 week old chicks and the bator. The temp gauge on the outside said 55 degrees. So, I opened to check the therm. that I have setting on the shelf inside and it said 55 also. I took the eggs and put them in the styrofoam bator I have going in the house but it is overfull. I hope to find out what to replace to get my temps back so I can move the eggs back into the 1202. My question is what could be wrong with it? Would it be the wafer thermostat. If so do I replace both of them or could it be something else to cause it to quit heating?