ASCO 238210 132 D Coil 30067439 890 System Protection: Effectively mitigates high limit System Protection: Effectively mitigates high limit trips and evaporator coil icing by maintaining a consistent airflow volume through the furnace or air handler You will need standard wrenches or a socket set to remove the spring cage and access the internal seat stem module it must be used within the appropriate NEMA rated enclosure (Type 1 through 4X) provided by the valve assembly to ensure full environmental protection this FB series replacement coil is designed for continuous duty cycles and features a Class H insulation system to withstand high ambient temperatures without compromising coil integrity