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Posted by Dr. Hardcrab on February 4, 2008, 4:53 pm
>I have a 6 year old Goodman 3 1/2 ton "split system" heat pump
It's lasted 6 years????!!!!
; the
> compressor is about 40 feet from the air handler. The heat comes on,
> blows hot (108 degree) air off and on for a few minutes, then blows
> lukewarm (78 degree) air for hours, seldom reaching the thermostat
> setting.
>
> I've got a graph that shows the pattern over a couple of hours:
>
> http://img138.imageshack.us/img138/2423/hvac2ac5.jpg
>
> So, with the thermostat at 70, the air in the vent starts at 64.
> Within 10 minutes, its over 106.
> Then at 25 minutes, it drops precariously to 76, then immediately
> returns to 106/108.
> It stays at 106/109 for another 25 minutes, then drops again to 74.
> It spikes a time or two, then settles in at about 78 for hours, with
> occasional spikes down to 74 and up to 88.
> The temperature in the house never reaches the target of 70 degrees,
> hovering around 67/68.
>
> My repair guy (who first sold it to me) seems unable to remedy the
> problem. About yearly, he checks/replaces heat strips, rewires and
> replaces the thermostat, adjusts some differential, and declares it
> working. But any meager improvement seldom lasts very long. He says
> the drops and spikes are normal.
>
> What's your take on it?
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