Repair Help

My Whirlpool refrigerator is not keeping food cold enough.

The water pressure in my refrigerator is not good.

The controls on my Whirlpool refrigerator are not working properly.

The fan in my refrigerator makes an odd noise.

The lights in my refrigerator are not working.

My refrigerator is not sitting level on the floor.

My refrigerator is not getting cold enough.

My refrigerator is not keeping the proper temperature.

My refrigerator is leaking water from somewhere.

My refrigerator is not getting any power.

My refrigerator is not cooling properly.

My cooktop smells like its burning.

My cooktop keeps beeping why is this?

My cooktop takes a long time to heat up.

The back left burner on my cooktop is out.

My cook top is not sitting level in the cavity.

The glass on my cook top is cracked.

The front right burner is out on my cook top.

My cooktop is not getting any power to it.

The knob on my cook top is broken.

The fan in my cook top is making a grinding noise.

My cook top elements will not stay at the set temperature.

I am concerned because my range smells like gas.

The control panel is not working at all on my cook top.

My cook top smells like its on fire.

The back two elements on my GE cooktop will not light.

The knob on my cook top is broken.

Original issue was it was not defrosting at all now after I replaced the main board and Defrost bimetal thermostat with a thermostat I had that was a WR50X55 The customer says the temperature fluctuates between 35 and 45° F once or twice a day so I’m guessing it does not defrost frequently enough. Could it be that I put in a random GE defrost bimetal thermostat that I had on me? Let me know what you guys think I want to stop by there this afternoon and fix it and if I could have a basic explanation of bimetal defrost thermostat’s maybe there something I don’t now because most fridges if it’s not defrosting you need to replace the Defrost control but certain fridges just replacing the thermostat will suffice.
HEATER TESTED OK. I replaced the thermostat just in case, I did not suspect it of failure.