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The model number of the unit is 4TWX6036B1000A while the model of the thermostat is TCONT802A532DAA.

Hi. I have a 4.5 year old Trane XL16i system. A couple of months ago I had a tech out to do a fall service checkup and when he was out here he discovered a low line temperature and also noticed...

The tweaks and hooking up the loose wire seems to have made a significant difference. We've had several cold days recently and the usage has dropped dramatically...On the order of about 40-45kwh per...

I know when they left, they told me that if I wanted them to, at any time they would call a Trane specialist to come down to take a look at things. Is it normal for the heat pump to need "tweaked"...

Because of the crappy weather we've been having lately here in Ohio, the installers finally were able to come out today to check things out. One thing that was discovered was that the wire going to...

Well the installer (as well as the president of the company) is coming out next Tuesday to take a look at things. I know according to ARI, my specific unit has an HSPF of 8.75. From the...

Yes it is.

It's a Trane 802 thermostat.

Ideally what should the dip switches be set to?

So should W1-W3 not be tied together? What disadvantage does this provide?

When you talk about the aux heat being divided with an outdoor...

I guess if the wiring is correct, I'm left to wonder what the problem may be. It just doesn't seem right that a new unit would be using considerably more electricity compared to an old one in the...

When the heat pump is in the defrost mode and aux heat should be running, should the thermostat show that it's using aux heat? Whenever it is in defrost mode, it never shows "aux heat on" on the...

I took several pics yesterday afternoon and have uploaded them to a web site...I tried uploading them here directly but every time I tried, it just said the upload failed so I don't know what the...

Now I'm beginning to wonder if anything else is wired up wrong...

I have noticed a few times (but definitely not near all the time) but didn't think much of it then that when the heat (or air)...

3 filters (2 returns upstairs and 1 return downstairs)

Tonight I noticed something interesting...When the heat pump goes into defrost mode, the temperature that comes out of the register drops significantly (back to close to the temperature of the air...

The filters were changed a little over a month ago and still look good as new. They are pleated. The size of them is 12x12x1. No, I do not run the fan continuously. I just have it set to come on...

There is no filter in the actual furnace. Instead the installer changed out the grilles at our return vents and put the filters in there so that we didn't have to worry about going into the crawl...

I just set it at 68 and leave it there all of the time.

One thing I forgot to ask earlier...If the heat pump is not completely level, can that cause any efficiency problems?

Which panel is the dip switches behind? When I'm looking at it, I see a big panel on the right side with the cover to the breakers. Then to the left of it, there's a couple of smaller panels. I...

It's a 19.2 kw aux strip. I am not sure of what the dip switches are set to...I would have to go into the crawl space and check. Any specific ones I need to look at or just all of them?

Here is the exact equipment I have:
Air handler: 4TEE3F37B1000AA
Heat pump: 4TWX6036B1000A
Thermostat: TCONT802A532DAA

The length of the line is 18'. The furnace is located in a crawl space...

According to ARI, it is showing that the Btuh put out by the XL16i at 17 degrees is only 17,500 while while both the XL14i and XL15i are showing that the Btuhare in excess of 20,000 at 17 degrees. ...

The airflow was measured to be 1202 CFM.

Where is the "proper" place to measure the temperature to get an accurate gauge of the change in temperature? I know that with the measurements on the sheet that the installer provided to us, he...

I checked the cph settings for each stage and here is what they are currently set to:
1st stage = 3
2nd stage = 3
3rd stage = 9

Any recommendations of what each stage should be set to?

I...