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the heating side must use a Reverse Acting (RA) thermostat for proper reset logic
It features an 18-inch capillary tube for accurate remote sensing
or dual heating and cooling applications
the ETR503 eliminates the need for field calibration
25" footprint allows for a drop-in HVAC control board replacement without modifying the existing cabinet or mounting bracket
Carrier HK61EA018 Circuit Board Freon the heating side must useThe Carrier HK61EA018 Circuit Board is the definitive OEM replacement control board for residential HVAC systems utilizing X 13 permanent split capacitor (PSC) or constant torque motors. As a direct successor to the HK61EA013, this integrated furnace control manages critical timing and logic for the blower motor, inducer, and ignition sequence. This Carrier furnace control board is engineered to withstand the thermal stress and electrical fluctuations
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