Then open the freezer up and feast your blood-shot squinties on that evaporator coil. Usually you can tell by simple observation. Locate a side panel on the side of the compressor. You’ll see a device called a starter relay switch, which you should unplug from the compressor. There are several common signs you can look for to tell if your heat pump is low on Freon. So you only need more refrigerant if there is a leak somewhere. Then plug the refrigerator back in and let it run while you suck back on a can of PBR, just like yo’ pappy used to do. Refrigerant isn’t used up like gas in a car. Constant Motor Activity. Smell. So if you see the signs of low refrigerant, that usually means a technician needs to find and fix the leak. Sickness. Even if someone did add more refrigerant, you’d regret it because the leak will allow the refrigerant to escape again (and that stuff is expensive). Locate a side panel on the side of the compressor. One common question we get from homeowners: “How do I tell if my AC needs Freon?” In this article, we’ll review what Freon is, what is actually used, and how to know if your air conditioner needs a recharge. By law, a professional technician cannot “top you off” with more refrigerant if they know there’s a leak. Typically, if you notice an oily substance around your fridge or perceive a strong unusual chemical smell, then there’s a fair chance that the Freon tank has been punctured and some of the Freon has been leaking. freon in a soda machine is the same as a refrigerator most of the time these machines and refrigerator's do not have service valves for the Freon in order to check the Freon you … Freon leaks can occur if you pry open, puncture or cut into the tubing of your fridge. First of all, in a perfect world, your air conditioner should never need more refrigerant. How to Tell If Your Car Is Low on Freon? Step 2. This is a normal occurrence due to seal shrinkage and compressor inactivity during the colder winter months. How To Tell If Your Car AC Needs Freon In the simplest form, you’ll know when you need an AC recharge if your AC starts pumping warm air instead of cold.