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    bobkat74's Avatar
    bobkat74 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Aug 23, 2008, 02:21 PM
    Heat does not shut off.
    I have a baseboard hot water system that has a circulator but the hot water continues to flow when the circulator is not running. Is the circulator supposed to prevent the water from flowing?
    Thank you.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Aug 23, 2008, 04:07 PM
    Sometimes you have to add a check valve to the system to prevent thermo siphoning.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #3

    Aug 23, 2008, 07:54 PM
    If you have more than one thermostats with the system you may have a zone valve stuck open.
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