My old refrigerator was most of my electric

[No Vested Interest]

5. Usually any appliance that produces heat uses the most electricity.

Refrigerator may be the exception. Perhaps high electric usage is because refrigerators run continuously, 24 hrs per day while most heat-producing appliances run intermittently, for shorter periods.
I unplug my small heat-producing appliances- ex. coffee-maker- between uses, and turn off overhead lights when leaving a room, though not skimping on light for vision and safety's sake as necessary. (A fall from lack of light would be far more costly than an electric bill.)