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

    Feb 9, 2008, 07:32 PM
    Heatpump not working
    I have a lennox heat pump and when it is turned on in the heat mode the head pressure goes up 500psi and compressor starts to over amp but when it is turned over to coolling the unit runs fine it is a 410a unit
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #2

    Feb 9, 2008, 07:47 PM
    You have a bad txv or a restriction at the piston on the out door unit.
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
    Ultra Member
    		  
    #3

    Feb 9, 2008, 07:52 PM
    Is your indoor fan running during this time in the heat mode? And is the filter clean, possibility of low or no air movement?
    John Crossing's Avatar
    John Crossing Posts: 2, Reputation: 1
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    #4

    Jul 10, 2008, 06:26 PM
    Thermostats can change the pressures if they are bad on heatpumps might be the thermostat.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #5

    Jul 10, 2008, 09:01 PM
    Thermostats can change the pressures if they are bad on heatpumps might be the thermostat


    Makes no common sense.
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