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Very interesting thread. Some great info here. But, there are some other things to consider.

!. It's the ol' setback controversy. To set back or not. I use the 'set it and forget it' logic. ...

I'm just a lowly Homeowner so IMHO....

Your system is telling you it's overcharged. I went thru the same problems with my Infinity. The system is trying to protect it self and is shutting down...

I've got the 25HNA9 unit and have had it for almost a year. It has the whine you mention. That whine on mine is not as loud as the defrost cycle (now that's loud). It appears the issue is the...

This dictates going with electric baseboard with built in stats. Once installed no maintenance. No filters, little liability. Each (most likely) will take a 220v run to panel. No asbestos problem...

The system, for a year, is warranted by the installing Company, backed up by Sears. Part of the paper work, upon completion, is the Company's phone number. That's how they get paid by Sears. You...

Thanks fellas, that's exactly the info I needed. :)

I have a Carrier FE4ANF002000 Infinity Air Handler with a 10kw strip. The saleman said that they will stage from 5 to 10kw when needed. Mine doesn't. It shows Stage III anytime they are called...

Thanks for the input. I feel better now. The Tech called and finally got the part in and is installing it tomorrow morning.

My wife (God bless her) is ranting, Replace the unit!, Replace the...

Mine didn't shut off. Once in awhile I can hear it ramp up. It'll run for a while then give up. It's like it forgets it's in trouble and tries to use the Heat Pump. I even heard it defrosting once.

Thanks AcDoc....

I like most Homeowners, are at the mercy of the Hvac Tech. I suppose there is a test for moisture? I like this Infinity system (until I get my electric bill after 3 weeks of...

What harm does operating a Heat Pump on low or no charge do to the unit?
To be specific it's a Carrier 25HNA936A003 with scroll compressor that
has been on low or no charge for over 3 weeks. Once...

It's a shame to have such a nice system and these problems. The fact that you're not getting fault codes is a good sign. I think school's still out on this set back thing. Ask folks about set back...

The OP has stated they like the higher temps as we do. When you are designing a system, being paid for by the homeowner, it should make the customer comfortable, if they like 65 degree or 85...

I don't think you'll need to oversize a well installed system. We like it at 77 degrees and our 19i Infinity does fine down to the high 30's when the strips kick in if needed. This can be...

I've got a new Carrier 19i Infinity and it does it also. Sounds like a loud whoosing sound like something is releasing pressure. Only happens when it's cold outside approaching 35 degrees or so. I...

It always amazes me why folks think they're comfortable in the summer at 79 degrees and 60 degrees in the winter. Our family keeps the therm at 77 degrees year around.

If we leave for a week or...

Great system. Set thermostat to desired comfort setting and leave it there. Let the Infinity do it's thing.......

Wow.....
It appears you have done your homework and tried to do what the Pros have suggested. Time to quit until you find the source.

Now, why don't you get a couple boxes of a good quality...

Most ceiling fans have a reverse switch. In the winter you run it in reverse which pulls the hot air along the ceiling down toward the floor. We use one in our Den sometimes while we watch TV. It...

Not a real tight home with no additional ventilation. Mostly just the 2 of us. It's a rancher with crawlspace. During the heating season it get's a little dry since we don't run a humidifier.

I live in Virgina along a river. I have an 19I Infinity with 2 stage compressor and var air handler. Mine is a 3 ton serving 1600 sq ft. It handled the humdity fine with the default setting of...

Pretty basic.....Heat rises, cool air falls. So, with ceiling supplies the warm air tends to return to the ceiling. Great for A/C.....cool air falls.

I've got ceiling registers and the ceiling...

I got the Infinity 19 installed in June. Very pleased with the results. Replacing old A/C and Hot water baseboard. Have heat set at 76 and cool at 78. On the Spring and fall days it auto switches...

Ah, the beauty of the 2 stage, variable speed systems.

I want my system to make me confortabe no matter what the outside temp. If it cost me more....so be it.:cool:

You shouldn't post names, but, I saw no flaming. You came to this Forum with a problem and have responded very well to the Tech's questions.

:)