my company right! You just must know your systems boundaries. Test never to established your thermostat lower than 67°F. The same as small outdoor temps, when indoor temp is too cold it drops the refrigerant pressure also minimal and ice starts to sort.Unpleasant smells from your air-con vents point out that your AC unit needs to be inspected.Signs of a leak include things like ice buildup on the skin unit, only heat air coming out in the vents, and also a hissing sounds close to the AC, signifying a far more extensive leak. Given that refrigerants might be risky to handle, the Environmental Security More Help Company (EPA) needs a certified professional to get and handle refrigerants.