Why is the walk-in cooler icing up

Got a call for a walk in cooler that keeps icing up. lets get out there and see what the issue is. Nor-Cal Refrigeration. walk-in box ice up issues. if you would like to buy me a cup of coffee https://www.paypal.me/norcalrefrigera... music 🎶for videos at https://www.epidemicsound.com/referra... #hvac #refrigeration #repair #walk-in cooler