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    oldpete's Avatar
    oldpete Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Feb 2, 2009, 01:38 PM
    Rad up stairs are hot down stairs are cold
    I have a standard boiler 3way valve and pumped system. Up stairs 4 rads all working fine, down stairs I have three cold rads. Pump sounds like its working
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Feb 2, 2009, 02:06 PM
    A control/zone valve is probably not allowing the hot water to flow through the down stairs radiators.
    oldpete's Avatar
    oldpete Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Feb 2, 2009, 03:25 PM
    What is a control/zone
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Feb 2, 2009, 04:42 PM
    A control for the system is probably defective.

    OR
    A zone valve is defective.

    Since I do not know what controls the flow of hot water to your down stairs radiators I took a guess at what you have.

    If the 3 way valve is controlling the flow then I would look to see why it is not allowing the flow to the area having the problem.
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