The answer to 'air handler blowing cold air' is that the most common causes are a malfunctioning thermostat, a refrigerant leak, or a problem with the air handler itself. This can happen if the air handler is not properly maintaining the desired temperature in the home, leading to the air coming out of the vents feeling colder than it should.
Some key symptoms to look for include the air feeling significantly colder than the thermostat setting, the air handler running constantly, and the home not reaching the desired temperature. Potential solutions include checking the thermostat, inspecting for refrigerant leaks, and having a professional HVAC technician diagnose and repair any issues with the air handler unit.