![]() ![]() If there is a flame, check the flame sensor. If there is a spark but no flame, check the gas supply to the heater. Remove any corrosion from the spark electrode and flame rectifierĤ. UseĢ quarters together as a gauge to check gap distance.ģ. If there is no spark, check the spark electrode for the proper ¼” gap. ![]() Watch the igniter through the observation window provided. No flame detected – The heater will make three attempts at ignition before the control goes into this lockout condition. Return (Inlet) Temperature Exceeded 230☏. Assure that there is adequate flow through the heater by accessing the Supply (Outlet) Temperature exceeds 230☏.ġ. Check the electrical connection to the thermister on the inlet manifold. Interrupted or Shorted Return (Inlet) Thermister.ġ. Check the electrical connection to the thermister on the outlet manifold. Interrupted or Shorted Supply (Outlet) Thermister.ġ. Check the flue temperature during operation using a combustion analyzer. Push the red reset button on the vent temperature limit switch. Check thermister reading on supply thermister. ![]() Status menu and assuring that there is less than a 50☏ rise from the return thermister to the supply thermister.ģ. Table 14-2: 925 Control Board FAULT Codesġ. ![]()
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