There could be many reasons for this but we’ll highlight some of the most common ones below.u003cbr/u003eu003cstrongu003eLow refrigerant:u003c/strongu003e There might be a leak in your system in which refrigerant escaped and caused the freezing. Fortunately, a technician can easily fix this since it usually involves adjusting soldier joints and reducing friction between pipes.u003cbr/u003eu003cstrongu003eDirty evaporator coil: u003c/strongu003eAn evaporator coil gets dirty through the normal wear u0026amp; tear of function, but this indicates the air filter might be old and is cutting off air flow.u003cbr/u003eu003cstrongu003eDefective blower motor:u003c/strongu003e A blower motor can lose its rhythm in that it might be running at improper speed, whether faster or slower.