Furnace Evaporator Coil Frozen

This is especially true if the obstruction happens near the evaporator coil the coldest part of the ac.

Furnace evaporator coil frozen.

Evaporator coil cleaning is an essential part of our ac tune up service for this exact reason. When air isn t freely moving across the evaporator coil its temperature drops leading to a frozen ac coil. If the water is stuck in one place because of a clogged pipe it can freeze. Frozen ac coils are caused by blocked condensate lines.

Replace your system s air filters regularly. This prevents it from getting the airflow it needs to properly move heat which means that the system could then freeze over. Condensate lines are the part of your hvac system that drains away excess moisture from humidity. In a properly functioning system the evaporator circulates refrigerant vapor at about 40 degrees the optimum temperature to extract heat from the airflow passing through the coil but never frigid enough to produce ice.

The first concept to understand while troubleshooting a frozen evaporator coil is that the coil is supposed to be cold but not freezing. This will cause the condensation on the coil to freeze over. Air conditioners require correct refrigerant levels to operate. Fixing a frozen evaporator coil a coating of ice on the evaporator coils will prevent the coils from working properly.

This moisture condensed into water travels through pipes to a floor drain. This will interfere with the creation of cool air for indoor comfort. If you continue to run the unit while the coil is frozen it could cause extensive damage to the system. Make sure to turn it off at the breaker box.

Keep the evaporator coils clean as dirty coils can restrict air flow across them. This can be due to anything from closed off air registers to a malfunctioning air handler. While a frozen ac may be caused by malfunctions or damaged equipment proper maintenance can help avoid some issues. If your evaporator coil has frozen up the first thing you should do is turn off your unit.

A dirty air filter or restricted air movement in ducts could be preventing proper airflow. Since they are no longer in contact with the surrounding air they will not be able to absorb that heat and air coming out of the supply vents will be warm. If there isn t enough air blowing over your evaporator coil the coil won t have enough heat to absorb.