I work as a an electrician/teledata installer and can offer a few tips. Consider a central location to route all your cables in the entire house and use a residental media hub like the one Leviton sells it allows you to add various components based on your needs . Buy having all your cables and components in one location it allows for a convenient place to do all your switching, cross-connects and networking in one place, plus the ability to adjust for future technologies. You could add multiplexers for security, convert a future fiber optic internet connection into an Ethernet swich that coverts signal for distribution devices as needed and many others options. Cat 5e/6 cables offer a lot of flexibility, baluns are the peices that can be soldered or terminated on the ends of an cat5e/6 cable allowing it to adapt to hdmi and a wide array of other connection types. Other users who offered the advice on raceways are correct smerf tube is a good way to go be sure to get a pull string or something similar (I use 16 awg thhn electrical wire) installed before closing the walls. Best of luck. Here's link to leviton home media cabinets. Here is a link that might be useful: Inside Leviton Structured Media Enclosures

I have the exact same issue but performed a few different troubleshooting steps that were not mentioned here. To begin, this is a rental home built in 1972. All aluminum wiring with some copper for lighting overhead that was updated in 2009. My washer is brand new, LG high efficiency & overpriced. I’ll add that I have a matching oversized LG gas dryer too. They both plug into 1 receptacle with the a top and bottom outlet. This is wired back to the breaker box as 2 20 amp circuits. They share a neutral wire. The circuit breakers were old and not joined with any bar that physically connected the two switches into one so that one off makes both off. The receptacle was old, loose and burnt up some. And even more concerning, the tab on the line (right side) was not broken to properly separate the top and bottom circuits. Luckily I didn’t find out the hard way. Although the panel was not labeled/correctly, I went through process of elimination by turning everything off and then testing one breaker one at a time and matched to outlet(s)& lighting it controlled. I assume that someone replaced this laundry receptacle at least once in the distant past and forgot to break the right tab. I replaced the receptacle with a new 20 amp outlet and broke the tab on the right side only. There is a red & black wire (on right with tab connecting top to bottom removed) and one shared neutral wire that is white (on left with tab intact.). It is also grounded of course. I also replaced the two circuit breakers in the box with new and specifically for this type of setup. It has the bar that physically joins the switches for off and on. I also checked and tightened all neutrals in the panel. But even after all that, the damn dimming still occurs when agitating. I should add that all my lighting is LED too. Here is the last important clue that I would think others could try too. I was doing some laundry and it had just started to agitate and dim like always. Just as a temporary measure, I paused the cycle & then hooked my washer up with an extension cord to another nearby circuit. It’s about ten feet away and it’s a heavy duty cord but was my last straw of an idea to check & was not a permanent arrangement. Anyways, the washing machine worked fine and there was no dimming throughout the entire cycle. I left it like that for a few days and it continued to perform without dimming the lights. Additionally, this dimming would occur whether the dryer was also being used or when it was off. Keep in mind that they share one neutral. I tested both the top and bottom outlets and the readings all indicate a grounded correct setup. There is no open neutral. I still don’t know why it does this but believe it is definitely related to wiring, not machine. Perhaps i also need power company to come out like person above had when their issue was resolved. I’m moving to purchased home in a matter of weeks so the landlord can decide how to proceed from here. just to give you an idea of the mess this was....

I mentioned way up thread that you should talk to friends or your real estate agent and ask for the name of an a/c company that they trust. Explain your situation and have them come out and do an inspection. It could be a very simple fix, like a duct tear. You are more likely to get someone to come out now when it is slow than in the dead of summer. Don't go into a long complicated explanation. Just say you feel like the a/c is not working properly, the builder is ignoring calls, will you come out and do inspection? If the a/c inspection finds a more complicated issue then take some photos and you will have ammo against the builder.

Tract refers to backward vertical integration where the builder buys undeveloped land, develops the land by installing roads and utilities and then builds houses on the lots, making profit from the lot and the house. It has nothing at all to do with the quality of the house. I know a gentleman who does tract developments who is very high end, each house is designed by an architect specific for that property. So these are not even production homes, but they are still tract homes as he moves a significant amount of the profit to the lot development. The typical tract builder will make profit from the land, sell the basic house at or near cost and then make profit from the add-ons. However, let's be clear, tract or production builders are not lower quality as a function of being tract or production builders, there is just a lot of demand for those types in the market. If there is a enough demand for it, you will find a builder willing to meet that demand... We have another builder who is only building LEED Zero community. I assure you that you don't get a LEED certified Net Zero home using cheap labor and inferior products. ----- To the OP - mistakes happen in every build from custom to production and often are a real battle to get fixed, even on custom builds. I am sure the mistakes are concerning to you but what you have described sounds like a communication problem, and while concerning, those things are getting fixed. I don't think these issues are worth walking away over.