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    York Demand Defrost questions

    I have a York Affinity home heat pump, model YZH04811 which, when in defrost mode,
    causes low temperature air - 50F - to come out of the registers in the house.
    When I had my regular tech do the...
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    Final question

    Thanks for all the suggestions thus far. But before I call a York dealer, can someone definitively tell me if it is wrong for 50F temperature air to be coming out of my registers in the house when a...
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    More questions on York air handler

    I have been looking at the jumpers on the air handler board. The customer booklet that came with my units has several tables to describe how to set the Cool, Adjust and Heat jumpers. My jumpers are...
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    Closer look at air handler

    This is a little closer view, maybe clearer. I will take other photos later this week when I return home from a trip.
    Thanks
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    Jumpers on York boards

    I think I have attached photos I took when the technician had the outside unit cover off and the air handler cover off. Perhaps you can see how the jumpers are set. The BP is 35, the LTCO is maybe...
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    York Affinity Heat Pump Demand Defrost

    I have a York heat pump system and I believe my demand defrost is not working properly. When the defrost cycle is working, the air out of the registers in my house drops to around 50F. The defrost...
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    Air return measurements - am I crazy?

    I have a two story 2500sq ft house in Delaware. I have a York heat pump
    system that I plan to replace. The upstairs is always hotter than the downstairs. I brought a TSI velocimeter home from work...
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    Heat pump system options - what to do?

    I am getting estimates on replacing my 9 yr old 10 SEER York heat pump system. York, Trane and Lennox contractors have provided me estimates on 17 SEER heat pumps. The pricing on the heat pumps and...
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