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Thread: Simple Question

  1. #14
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,475
    It takes a minute or so for the coil to warm so you may be reading the temp of the air that is just sitting in the return ducts. Or your valve could be slow to fully switch. A good tech can tell by watching his guages and switching the valve. If the valve is sticking it will be apparent on his gauges.

  2. #15
    Join Date
    Nov 2008
    Posts
    162
    Or your valve could be slow to fully switch.
    I would like to understand this valve a little better. Is it switching every time the heat pump comes on? It is always only calling for heat, does the valve start in one position and moves to another?

  3. #16
    Join Date
    Nov 2008
    Posts
    162
    It takes a minute or so for the coil to warm so you may be reading the temp of the air that is just sitting in the return ducts.
    Return air temp always remains constant. The first minute the temperature rises up nicely, it is after this "peak" that the compressor starts its "slugging" causing the temp to fall until "slugging" quits, then temp begins to climb again.

  4. #17
    Join Date
    Nov 2008
    Posts
    162
    Just took the temperature of the high pressure side and at 40 degrees ambient temperature reading started at 126 degrees, after 60 seconds temperature dropped 6 degrees. After 15 minutes it reached 166. After pump has been running for a long time it works well, but why does it take so long and what about this 6 degree drop??

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