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I really appreciate all the responses, there is clearly a wealth of information here. I am going to have another contractor out to take a look at things and give me an assessment, but that begs the...

The ducts on the return are similar to the supply, with a Y at the top feeding to two 16" flex lines. Those flex return lines hook up to 2 separate plenums (one on each side of the house). There is...

Beenthere-I'm not sure what that means. If I told my contractor that I would like to have vanes installed, I'm assuming they would know what they are? Also, what benefits do they provide?

I'm going to try and attach some images. I'll try to describe the setup. On top of the air handler is a "Y" where two 16" flex ducts are connected. The first split runs a short distance to a...

SBKold,

Your statement is correct. Those 2 flex lines feed the far side of my house (2 bedrooms and 1.5 baths). Each line runs across the attic to a duct board plenum? From there, each of the...

I know they did have to use some large flex ducts in my attic due to the way the trusses were designed. I have 2 main "trunk" lines going across the attic (supply and return) that are 16" in...

My unit is 410(a), and the duct work was installed when the current unit was installed (8 years ago when we built the house). I'm not sure how I would determine if there is inadequate duct work.

I trust these guys. They are the ones that put in my system originally, and have a good reputation in our town. I haven't seen anything that would indicate that they have or will cut corners.

I've got a 5 ton Carrier Heat Pump (38YDB outside unit, FV4B indoor unit), that has developed an evaporator coil leak. I believe my system is fairly efficient already (unable to find my combo in the...

Guru..you were right....5 year warranty, but only on the parts. I had to pay for the labor. Of course, it took him 5 minutes, so I probably could've found a Thermidistat for less and installed it...

Hey Guru...I looked at my Thermidistat book, and it claims a 1 year warranty. Is this different if it was installed as part of a complete system? Tech is coming in about 3 hours, so it would be...

Thanks Loonie, I'll make sure to talk with them about it later today. Is it comparable in price to the Thermidistat? (I don't want to have specific numbers and violate the rules, just a general...

I posted a message a couple of weeks ago about my 3.5 year old Carrier Thermidistat acting funny. Well, it looks like it has kicked the bucket. So, the tech is coming out this afternoon to replace...

flipping the dip switch for installer mode from off to on to off again seems to have fixed the problem. If it happens again, I'll call my service man.

Hi gang,

I have a 4 year old Carrier 5 ton system. I woke up this morning to a cold house and "Inst" on my thermidistat display. I know that indicates that it is in installer mode, but why...

pgmr...I'm not easily insulted...yes, the outdoor unit is running the entire time, with the exception of when it is switching between hi and low, and then only the outdoor unit's fan is running. ...

I don't know a whole lot about HVAC systems, so I'm not sure what he used to charge the system. I did see him attach a pair of gauges to the unit while he was adding the freon, and he definitely did...

thorton,

Thanks for the input. I've looked at the dip switches, and they are set correctly per the instructions as best I can tell. Do you think adjusting the anticipator setting would help my...

I looked through all the settings, and by reading the descriptions they all seemed to be correct. The only one I wasn't sure about was the anticpator setting. That is the only one that seems like...

Hey dash, how is the thermidistat "properly" set up? I have the installation guide, and the only thing I've really messed with in there is the Aux heat lockout temp. Some of the other settings I...

air handler model number is FV4BN. The thermostat is the Carrier Thermidistat...not sure about an exact model number. I didn't get the Infinity system because the company that did my install(didn't...

I'm pretty sure that during the night it is running on high for a good portion of the time. The insulation seems pretty good, and it is new construction. I believe I have R-19 in the walls, and...

Hi all. This is the first winter I've lived in my newly constructed house. I have a Carrier 38YDB heat pump with the variable speed indoor fan (can't remember the model, but it isn't the...

Just one last follow up on this. I spoke with the HVAC contractor and he said he would come out and have a look at the system. I did find the section that said that in cool to dehumidify that the...

Dash...congrats on buying real estate in Gainesville. You might be able to retire soon on that! The HVAC contractor said he would come out and have a look at the system to make sure everything is...

Dash,

I think I read on here that you are in the Tampa area..I'm just up the road in Gainesville. What are the RH readings that you typically see in your house?

It's been relatively cool here in FL the last couple of weeks. We've had a couple of days of rain and 75 degrees. The humidity tends to stay around 60%...sometimes creeps up to 63-64, and sometimes...

OK. Thanks guys. I guess I just misunderstood how this was supposed to work. I saw the earlier post that said 10 minutes on/10 minutes off, I guess I just missed the "up to" part. 6 minutes just...

I know it has been a couple of weeks on this one, but I just wanted to get some more info. We had a brief power outage and after that, the stat allowed me to set the humidity to 50(can't figure that...

I'm wondering if somehow the installer didn't setup the stat to indicate variable speed air handler? I also noticed in the install instructions that there was an option for super dehumidify mode...

I can't set the relative humidity below 60%.

I was able to find the install instructions on Carrier's website, but it says essentially the same thing about the dehumidify that the homeowner's guide says. It just talks about how to set the...

Let me tack one more question on here. I thought that the thermidistat had an "Ideal Humidity" feature that would automatically adjust the humidity in the house based on the outdoor temp. How would...

Let me know if this question is out of line. If so, I will understand. In trying to setup my new Thermidistat with 38YDB heat pump and FV4A fan coil(new construction install). I tried to set the...

It is a supply duct.

Thanks for all the help!!!!! Well, if you can't laugh about this....what can you laugh at? :)

The problem is, I'm not sure if he is still in there or not. I just don't know what to do.

I don't know if this is common or not, but while at my currently under construction house, a bird came through an open window (actually no glass around the front door). Anyway, there was one vent...

I was afraid of that. Thanks for the response. Not that I need to know what stage it is all running in....just would have been nice to keep track of.

Is there anyway to tell which stage of heating/cooling is activated using the Carrier Thermidistat? I have a 38YDB heatpump with FV4 (I think) variable speed airhandler. Just curious to see if the...