CIRCUIT BOARDS

ELECTRICAL ITEMS AND CONTROLS ARE FACTORY TESTED AND ARE NOT RETURNABLE

The control circuit of a furnace manages a variety of data produced by the thermostat, the sensors near the burners, the ignition system and the blower mechanism. It is in charge of starting up components in the correct order and then shutting them down properly when the furnace finishes its job. A control circuit can fail in several key ways, requiring require a replacement of the board or nearby components to keep the furnace operating correctly.

One sign that the circuit control board has failed is a lack of any type of response. For example, the thermostat is sending signals to the circuit board, but wires have lost the connection or the panel itself had burned out. If you have an ohmmeter, you can test the wiring running to and from the circuit control board to see if the wiring is at fault or if the problem lies within the circuitry itself. Replacing a few wires can be less expensive than installing an entirely new panel.


Circuit boards also includes a timer that controls the furnace blower after the burner or element has been lit. The timer itself can fail and lead to a properly operating burner but the blower fails to turn on. The relay switches and pressure switches that the furnace uses to open and close separate circuits can also fail, causing the timer to work but never send signals elsewhere. When the internal timer fails, you may need to replace the entire control board to fix the problem.


Thermistors and thermocouples send signals to the control board indicating the heat levels of the pilot light and burners. This helps the control board switch on its timer, shut down the furnace if temperatures are excessive and start the primary burner. These sensors can become loose or may have failed.

Consulting an HVAC professional to take a look at your furnace may be the best alternative and not save you the effort but also get the job completed quickly and safely. Modern furnaces have diagnostic indicators that show a series of lights. The pattern indicates particular problems. Charts are built into control panels or are available in manuals for more detailed looks. You may try to reset your furnace entirely to see if a diagnostic error is preventing the system from working.


 
1 - 41 of 41 items
GMC 0130A00078S GMC 0130F00275S GMC 0130F00280S
GMC 0130A00078S SHARED DATA, AIR HANDLER PCBGMC 0130F00275S MEMORY CHIPGMC 0130F00280S MEMORY CHIP

$34.95

$18.95

$18.95

GMC 201300730954 GMC 201330790044 GMC 2133259020
GMC 201300730954 PROGRAM CHIPGMC 201330790044 DISPLAY BOARDGMC 201332590020 CONTROL BOARD

$1.30

$29.95

$31.95

GMC 201332590022 GMC 201332890002 GMC 201333090011
GMC 201332590022 DISPLAY BOARD ASSEMBLYGMC 201332890002 CONTROL BOARDGMC 201333090011 MAIN CONTROL BOARD

$23.95

$104.95

$62.95

GMC 201333090659 GMC 201337590001 GMC 201337790044
GMC 201333090659 MAIN CONTROL BOARDGMC 201337590001 CONTROL BOARDGMC 201337790044 MAIN CONTROL BOARD

$89.95

$164.95

$349.95

GMC 201337990050 GMC 201338090050 GMC 203337990161
GMC 201337990050 CONTROL BOARDGMC 201338090050 MAIN CONTROL BOARD ASSEMBLYGMC 203337990161 TERMINAL BOARD ASSEMBLY

$50.95

$279.95

$29.95

GMC 203338090308 GMC B1809911S GMC DFBK01
GMC 203338090308 ELECTRONIC CONTROL BOX ASSEMBLYGMC B1809911S CONTROL BOARDGMC DFBK01 DEFROST CONTROL BOARD

$369.95

$199.95

$89.95

GMC PCBAG127S GMC PCBBF118S GMC PCBBF137S
GMC PCBAG127S PRINTED CONTROL BOARD (DSI, 2 STAGE)GMC PCBBF118S IGNITION BOARD HSI INTEGRATEDGMC PCBBF137S PCB IGNITION HSI INTEGRATED CONTROL BOARD

$134.95

$199.95

$84.95

GMC PCBDM101S GMC PCBDM133S GMC PCBEM102S
GMC PCBDM101S / PCBDM130S DEFROST CONTROL BOARD W/ RELAYGMC PCBDM133S DEFROST CONTROL BOARDGMC PCBEM102S ECM PRIMARY BOARD

$29.95

$29.95

$28.95

GMC PCBGR103S PCB DUAL STAGE CONTROL MODULE GMC PCBHR104S GMC PCBJA103S
GMC PCBGR103S PCB DUAL STAGE CONTROL MODULEGMC PCBHR104S PCB CONTROL BOARDGMC PCBJA103S / PCBJA101S PRINTED CONTROL BOARD

$224.95

$269.95

$134.95

GMC PCBKF202SF GMC RF000129 GMC 201337590002
GMC PCBKF202SF FURNACE CONTROL BOARDGMC RF000129 IGNITION BOARD, HSI INTEGRATED GMC 201337590002 CONTROL BOARD

$429.95

$98.95

$124.95

GMC PCBBF132S GMC B1809923 GMC PCBBF112S
GMC PCBBF132S CONTROL BOARDGMC B1809923 PRINTED CONTROL BOARD GMC PCBBF112S / PCBBF123S CONTROL BOARD

$59.95

$132.95

$59.95

GMC PCBAG123S GMC PCBFM103S GMC B1809913S
GMC PCBAG123S PRINTED CONTROL BOARD GMC PCBFM103S / PCBFM131S TIME DELAY RELAY BOARDGMC B1809913S CONTROL BOARD

$84.95

$24.95

$89.95

GMC PCBBF107S GMC PCBAM104S GMC B1809904S
GMC PCBBF107S / PCBBF106S CONTROL BOARD GMC PCBAM104S DSI IGNITION CONTROL BOARD GMC B1809904S BLOWER CONTROL BOARD

$129.95

$98.95

$119.95

GMC PCBAM105S GMC PCBKF105S
GMC PCBAM105S DSI AUX CONTROL BOARD GMC PCBKF105S / 102S/ 103S CONTROL BOARD

$52.95

$162.95

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