The replacement board was a "Universal" So it was not the same as the original. Disconnect and remove the piggyback Define control board. Also on the old board there is a XFMR-H (black) connection AND a XFMR-N (white). Failure to do so may result in control board damage. control board synonyms, control board pronunciation, control board translation, English dictionary definition of control board. High Performance HVAC is certain there are more terms and acronyms. $248.12. I got the part number off of the board and typed it into Amazon search. How do I figure total amps in the panel box? G Flow Monitor (flow switch connector) H P Transformer Input (120VAC X 2) Important note: Pages 3 through 5 are procedures for programming the control board and the diagnostic codes for the control board. I also had to purchase a "flame ignitor sensor upgrade kit", because of the date of the furnace. I get 5 red flashes on my control board indicating open role out? I know it is mounted on 4 plastic stands, but sometimes the board can come in contact with the metal mounting plate. Heatcraft Defrost Timer 21340101. Control board installation procedures are described in detail in these instructions. $179.12. Read and follow these instructions carefully before replacing the control board. with a *G7 control board (PN 624690), install all wires from the door switch and 24V transformer on the same pin locations they were removed from. If you know of something we missed please email us. Carrier HK42FZ027 Furnace Control Circuit Board HK42FZ027. Good. If it did touch the metal, the whole unit shouldn't catch on fire. : The total connected load depends on the electrical devices that are actually connected to the circuits and how often these items are being used. $50.11. the heater kit and reconnect it directly to the new board. ProLogic: Main PCB Layout A I Remote DSP comm (RS485 – 10VDC) B Temp sensor terminal block (5VDC) C Heater 1&2 terminal block (dry contacts) D Valves 1-4 & 4Amp fuse ( 24VAC) E Cell Plug for chlorination F High Voltage Relays (top – Filter, Lights, AUX1, AUX2; bottom (AUX 3-6). HVAC Definitions Terms & Acronyms | Heating Cooling - This is a comprehensive list of HVAC Definitions Terms & Acronyms. Some are called Fan Timers, others Control Boards, Defrost Controls, Defrost Timers, Circuit Boards, Logic Boards and probably as many other names again, depending on the equipment or board manufacturers terminology! I removed the control board and found that the fan relay had burnt out. Defrost Control Board Trane American Standard CNT04364. Identify YOUR Circuit Board. $175.12. The new board only has 1 and it just states XFMR. TRANFER QUICK-CONNECT WIRING POINTS: As shown in Fig. With the exception of the mounting points, this board seems to be an exact replica of the Honeywell ST9120C4057 control board that was in my furnace. This added to the confusion when the instructions and drawing had sockets that didn't match ours :blink: and we couldn't get the burners to come on. what does that really mean? Contemporary furnaces have most of their operations linked into a furnace control board, which is the core of how the furnace works. 5. The modern furnace is a marvel of technology, especially when compared to the furnaces of yore, which were basically large ovens with pipes hooked up to them. $178.95. 1, transfer the following quick-connect wiring points from the old board to the new board: “XFMR-R”, “XFMR-C”, “C”. It might ground out the control board and cause it to get hot, start smoking, or the board catch on fire, but unit itself wouldn't catch on fire. 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