This FIL36-42 air filter serves as a critical barrier to protect the secondary heat exchanger and blower motor from debris accumulation

ensure this mark is facing upward when sliding the panel into the distribution tray

it is the validated replacement for 3H33074-7 and 3H33073B7 models

This assembly features a durable housing and a balanced impeller to minimize vibration and noise during operation

Heil Quaker ICP 1191443 Circuit Board 318820-201 This FIL36-42 air filter servesThe Heil Quaker ICP 1191443 Circuit Board is a critical OEM replacement control board designed for high performance HVAC system maintenance. This integrated furnace control manages the essential timing and sequence of operations for FVM4X fan coil units and compatible variable speed air handlers. As a veteran technician knows, maintaining the integrity of ICP heating and cooling equipment requires precise signal processing for 24V AC circuits, blower