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Carrier 38GRQB09 Control Board
The control board is constructed to oversee the gas valve, the ignition igniter, most sensors and the blower all together. Your system definitely will not run unless this board is installed as it should be according to the manufacturer. The correct control board must be compatible with the brand and the model of your particular system. It is imperative that you select wisely when you are choosing a replacement board due to the many differences between heating and cooling systems.
Clues to watch for to know your control board is on its last leg
- When turned on, there is numbered code shown directly on the front of the control board
- Power to the control board has to be powered down and back up frequently for the system to operate once again
- The unit refuses to go well
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