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    chris12345's Avatar
    chris12345 Posts: 1, Reputation: 1
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    #1

    Dec 16, 2007, 02:36 PM
    Troubleshooting concord 900GC
    Recently installed new 90% efficiency concord 900GC. Model keeps short cycling and gives me a code 3. This has been going on for a month. Any help will be greatly appreciated.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Dec 16, 2007, 05:12 PM
    Somewhere usually on the indide of door or panel,you should find a list of what codes are,, also check for a good ground,the new units seem to be a stickler for good grounds
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