Heater turning on causing unnecessary cooling

I personally feel like the heater is turning on for no reason. When the beer temp is about -.1 and the fridge temp is on the rise the heater kicks on and brings the fridge to around 75 degrees. The beer temp stays at a pretty constant temperature but it seems like a lot of unnecessary power usage. Below are my settings that I have changed around, any suggestions?

Kp: 2.5
Ki: 0.125
Kd: -0.75
Integrator: maximum temp error °F: 2

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