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Started By
Message
HVAC experts: anything wrong with this unit?
Posted on 6/22/16 at 10:29 am
Posted on 6/22/16 at 10:29 am
My house won't go under 75 in the heat of the day. I'm pretty sure it could be due to a dirty evaporator coil but I can't get to it.
My question about this picture is: Should that pipe opening right above the pan be plugged? It's wide open and I can feel cold air pouring out of it.
11
Posted on 6/22/16 at 10:36 am to motorbreath
do you have rats chewing on your insulation? I am not an HVAC person but I would assume it should be a closed system and any air leaking by is going to cause issues with the cooling of your space.
This post was edited on 6/22/16 at 10:40 am
Posted on 6/22/16 at 10:38 am to motorbreath
quote:yes it should.
Should that pipe opening right above the pan be plugged? It's wide open and I can feel cold air pouring out of it.
Posted on 6/22/16 at 10:55 am to motorbreath
your ducts appear to be in bad shape
Posted on 6/22/16 at 11:03 am to motorbreath
you need duct work for sure. You should never feel cold air coming from anywhere other than a return in a room.
Though check your condensor coils first, they are easy to clean and overheating on the condensor makes it really hard to cool the house.
Your evaporator (in that box) looks like a bitch to get to.
Though check your condensor coils first, they are easy to clean and overheating on the condensor makes it really hard to cool the house.
Your evaporator (in that box) looks like a bitch to get to.
Posted on 6/22/16 at 11:09 am to motorbreath
quote:
My house won't go under 75 in the heat of the day
I know this concept will be hard to grasp for some, but try to keep up. (ETA: Sorry I sounded like a dick. Its not a hard concept. However, I have had to explain this to my SO and her mother, and you would have thought I was trying to explain the theory of relativity)
When you live in a climate that has summers average above 95 degrees with heat indexes that can reach 110, it is not feasible to get the AC below 75 in the heat of the day. 25-30 degrees difference between outside and inside air is about the maximum you can hope to achieve. So if the heat index is 103, I would say its highly likely you aren't getting below 73-75 in the house. It just cant happen.
You might as well set your temp to 74 or 75 to save you a little money and prevent the AC from trying to play catch up all day, because it cant.
Also, how old is your equipment in the picture? Seems to have quite a bit of wear and tear.
This post was edited on 6/22/16 at 11:15 am
Posted on 6/22/16 at 11:14 am to Paddyshack
quote:
I know this concept will be hard to grasp for some, but try to keep up. When you live in a climate that has summers average above 95 degrees with heat indexes that can reach 110, it is not feasible to get the AC below 75 in the heat of the day. 25-30 degrees difference between outside and inside air is about the maximum you can hope to achieve. So if the heat index is 103, I would say its highly likely you aren't getting below 73-75 in the house. It just cant happen. You might as well set your temp to 74 or 75 to save you a little money and prevent the AC from trying to play catch up all day, because it cant. Also, how old is your equipment in the picture? Seems to have quite a bit of wear and tear.
So true. I set mine at 76/77 during the day. On extremely hot days I'll take my window unit out of the shop and put in my living room window. It cools that area down nicely. Looks trashy, but IDGAF.
Posted on 6/22/16 at 11:18 am to Paddyshack
Agree with Paddy 30 degrees off of ambient is the limit.
It is very easy to cut a hole in the top of the transition from the furnace to coil and shine a flashlight inside to inspect the surface of the coil. After inspection reseal the opening with a good foil tape with a backing that will seal well.
Make sure that you are changing the filter regularly.
It is very easy to cut a hole in the top of the transition from the furnace to coil and shine a flashlight inside to inspect the surface of the coil. After inspection reseal the opening with a good foil tape with a backing that will seal well.
Make sure that you are changing the filter regularly.
Posted on 6/22/16 at 11:20 am to LSUBanker
quote:
On extremely hot days I'll take my window unit out of the shop and put in my living room window. It cools that area down nicely. Looks trashy, but IDGAF.
Not trashy at all, baw. Anything goes when the dog days get here, especially in this part of the country.
Posted on 6/22/16 at 11:20 am to Paddyshack
Anything built in the last 10 years, assuming proper building and insulation techniques were followed, will easily do better than 75, even if it is 95 outside with a heat index of 103 or whatever.
That said, I am surprised the OP's unit is even getting to 75, looking at the shape it is in.
That said, I am surprised the OP's unit is even getting to 75, looking at the shape it is in.
Posted on 6/22/16 at 11:44 am to Paddyshack
quote:
would say its highly likely you aren't getting below 73-75 in the house. It just cant happen.
bullshite. Depends on how good your ac unit is and how well your home is insulated. You're painting with a pretty broad brush.
Posted on 6/22/16 at 11:53 am to chalupa
quote:
Bull shite. Depends on how good your ac unit is and how well your home is insulated
Under the circumstances I presented, it is not bullshite. Most average or standard homes are not going to have the proper equipment or insulation that you are referring to.
FWIW, my old man is an HVAC subcontractor for big level military housing projects. He's mechanically certified in about a dozen states. He performs work all over the country, in many different climates and conditions. He has been in the industry for over 30 years...
But I am positive you know more than him regarding this stuff.
Posted on 6/22/16 at 12:24 pm to motorbreath
(no message)
This post was edited on 6/22/16 at 12:26 pm
Posted on 6/22/16 at 12:25 pm to motorbreath
Looks perfect. Tell your guy to frick off and enjoy.
Posted on 6/22/16 at 12:38 pm to motorbreath
75 is typically the interior design temperature. Has your weather been around the highest/warmest you see during a year? If so, sounds like you got a properly designed and sized system.
Posted on 6/22/16 at 12:39 pm to chalupa
We've been kind of neglecting changing the filter but that practice has been discontinued. That could be a cause of a dirty evaporater coil.
Posted on 6/22/16 at 1:00 pm to Paddyshack
quote:
Most average or standard homes are not going to have the proper equipment or insulation that you are referring to.
Because of the extraordinary amount of jacklegs in the industry, I tend to agree.
A properly built home, with modern equipment, can easily meet or exceed a 30 degree differential.
Posted on 6/22/16 at 1:08 pm to Paddyshack
quote:
A properly built home, with modern equipment, can easily meet or exceed a 30 degree differential.
My home is currently sitting at 70, unit isn't running. It's 95 outside and feels like 100.
so I'd say that yeah, its possible.
quote:
But I am positive you know more than him regarding this stuff
Perhaps you and pops need to have another talk.
Posted on 6/22/16 at 1:10 pm to motorbreath
Probably tear the whole unit out, replace the insulation, ductwork, Sheetrock, air handler, heater, joists. It's about tree-fiddy.
This post was edited on 6/22/16 at 1:11 pm
Posted on 6/22/16 at 1:34 pm to loopback
quote:
possible.
Possible, and quite common.
I get it; the repair guy shows up to some raggedy mess (like the OP has, no offense) and he repeats the old "that's the best it'll do" line and carries on.
New stuff and even older, properly installed stuff, will do better.
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