The short answer is "No".
The explanation is as follows: Remember that a refridgerator is an insulated box that is supposed to keep a stable temperature based on the the thermostat and device controlling it. So if you are heating to 89 degrees and it is cooler outside of the cabinet, the thermostat will put electricity to the heating element to keep the temperature where you want it. Conversely, if the temperature rises above that, the thermostat simply shuts the flow of the electricity to the heating element off, so that it is not continuing to heat. All the box does is insulate so that the temperature effects from external conditions are minimized. If the temps were to climb above 89 and stay there for a day or more, it is very likely the interior cabinet temperatures would rise above 89 as well as it will acclimate, and since there is no device to cool it it can't force the temps down. Keep your incubator in a place that will stay below the desired incubating temp and then it can always turn on to make up the difference. I hope that makes sense.









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