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  1. J

    Cad Cell (Eye) Durability

    Thank you for your help. I appreciate it. jhc
  2. J

    Cad Cell (Eye) Durability

    The boiler service man replaced the relay, but the boiler did not start. The new relay was able to send him a trouble code that represented the resistance of the cad cell which was over 2000 ohms. He replaced the cad cell with a new one and the boiler started. He said the cad cell was bad. I...
  3. J

    Cad Cell (Eye) Durability

    I have a client who's boiler shut down due to the cad cell not "seeing" the flame. The boiler was recently serviced 10-months ago: (1) is it common to check the cad cell as part of the annual boiler maintenance? and (2) is the failure of a cad cell relatively slow -- such that a check 10-months...
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