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My installer is coming out to fix the blower and check for damage this morning.

He laughed when I told him about the cat. He told me that he has driven off with a cat in his van before; now...

We have a large Maytag/Nordyne package unit. The variable speed control on the blower motor fried sometime overnight, and I called my installer. He is a great guy, and came out on a Sunday...

He said it was from supply to return, so I assume TESP.

I am assuming second stage, but I'll ask.

Thanks

After discussing the issues with my contractor (using much of what I have learned from this forum), he spent all day working on the system. Here is what he reported:

- He has enlarged the hole in...

I talked to my contractor about the returns. When I expressed concern that the hole in the floor was too small (actually less area than the 16" duct), he said that if it were made larger, then the...

I've been told a few things by my contractor that don't seem to jive with what I've read on this forum; but maybe I am in left field.

He says:

1) Dampers are rarely used in residential HVAC...

This is a packaged system. It is at one end of our house. The supply and return trunks run lengthwise of the house in the crawlspace; trunk-and-branch topology.

If I get a chance I will go into...

You are right, it has 2-stage hp and 2-stage gas. However, the manual states that the factory configuration is for high fire only. I don't know if the installer has changed this, but I doubt it.
...

Do you mean that the air temperature at a register should be 20-30 degrees F higher than the air at the return grill when the heat pump is running? I need to check again, but I am pretty sure it is...

Ok, one more stupid question: what is TEL?

The 16" return duct is closest to the blower; maybe 15 feet or so.

Thanks

Apparently the concept of perspective is something I need to learn. The first duct is 16", not 12". I had estimated the width based on the width of the hole in the floor, which I had measured. Of...

I don't really know what controls the dual fuel, though I suppose it's a combination of both the thermostat (Honeywell TH8000) and the system (Maytag M1200). The system has a variable speed blower...

By El Cheapo, do you mean the fiberglass type? I'll give them a try. Since we were remodeling, I tried to keep high-quality, fresh filters installed to prevent construction dust from getting into...

I think I am beginning to put the pieces of the puzzle together. I now feel sure that we have undersized returns and room pressurization issues (no returns or jumper ducts in bedrooms).

I...

Those are the only two returns in the system.

By totals, do you mean air flow in CFM? I don't know that number; I'm trying to see if the installer has measured this. I don't have the equipment...

What is a liner? The hole doesn't appear to be lined with anything as far as I can tell. It's just the bare wood (with a joist going right through the center). See return_1_b.jpg.

We have a new 5-ton dual-fuel heat pump with gas aux. We have been fighting balancing problems, as some rooms are up to 8 degrees cooler than others. Also, the total fuel usage (both electricity...

I don't know if it is a seperate wire or not; I'll check that.

It doesn't act like electrical interference to me (could be wrong, of course), since the temperature slowly rises after the unit...

He has checked it once. It was originally stuck up under the base of the unit, dangling just above the dirt. He moved it up to the side of the unit and used nylon wire ties to strap it to the...

Tennessee. We have reasonable electric rates (TVA). Gas is pricey.

No, I did not install the sensor (nor any other part of the system). This is a new system installed as part of a remodeling project.

I have a dual-fuel system, heat pump with gas aux. I have noticed that the external temperature as displayed on the thermostat rises several degrees when the unit runs (5 or more degrees). I am...

He told me that today he is moving the point at which the run taps into the trunk to try to increase the flow. I'll have to hand it to him, he is very persistant.

Well, he's been out to the house at least 6 times since the original installation trying to get it right. He says he's not going to quit until it's working. I wish he would get on here and ask you...

The closest return is about 15ft away, around a corner and through a couple of doorways. The doors are always open right now.

I'm worried about what is going to happen when the door to the cold...