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    fjintx's Avatar
    fjintx Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Aug 3, 2011, 12:56 PM
    Strange Voltage Reading
    My outside compressor and fan won't start. On the contractor relay, I get a reading of 120 volts on each leg going to the contractor but when I measure the voltage across the two 120 volt legs, I get 0 volts. It should read 240 volts.
    Any ideas as to why I get 120 volts on each leg but together get 0 volts?
    Thanks in advance for any help.
    Frank
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Aug 3, 2011, 02:34 PM
    Sounds like you might be getting bleedover when checking one side at a time
    The correct way is to check both sides at the same time
    Sounds like you might have a blown fuse on one link or breaker that's half kicked,check fuses or turn off breaker and back on check again power with multimeter
    fjintx's Avatar
    fjintx Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Aug 3, 2011, 03:16 PM

    Thank you for the advice. I'll check it out and let you know.
    Frank
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