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International Comfort Products GDJ125M20C1 Control Board
Your furnace or AC will not operate without the control board hooked up and is correctly configured. The control board is designed to direct the gas valve, the ignition igniter, the flame sensor as well as the air circulator all together. Be absolutely sure upon choosing a board as a replacement due to so many small differences in models within certain brands. The selected board should match the model number with both the brand and specific model of your heating and cooling system.
Some clues your main board has very little life left
- There seems to be a type of code being shown somewhere on the board
- The system has to be powered down and back up quite a lot for the thermostat to kick in
- The furnace or AC refuses to operate period
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