Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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20 views

What is the minimum allowed distance an AC breaker can be placed from the AC unit?

I have a separate external AC breaker box in the middle of a wall and I'd like to move the AC breaker box closer to the AC unit so I can do something unrelated with that wall. I understand that the ...
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82 views

How do I fix a loud intake vent?

In the master bedroom, there is one of four intake vents in the house, and this particular one is very loud. Our house has two vertical air shafts that run parallel to each other, one for supply and ...
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61 views

One room is always the hottest in the house

Whether it's winter or summer, hot or cold outside, my bedroom is always the hottest in the house. I have taken temperature readings and the air temperature can exceed 85 degrees. I have a fan almost ...
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66 views

What happens if you wire a multi-split airconditioner wrong?

I got an air conditioner installed with 2 indoor units but during the process, we lost track of with line set went to unit A and unit B. The same goes for the electricity cables. I can't follow where ...
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1answer
49 views

Will rigid air conduit improve flow, over flexible ones

My top room (3rd floor) has poor airflow, from a central air (cool and heat). Looking in the attic, I found flexible ducts that go over many curves. I feel like the duct are getting compressed/bent at ...
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144 views

How to prevent electrical appliances from exploding

I've been reading news lately that AC or fridge explodes sometimes and causes fire and death. What are the other household electrical appliances that explodes ? How may I prevent this ? Is there any ...
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1answer
51 views

Preventing air conditioner from running when temp is below 65 degrees outside

Could l wire a thermostat outside and and set is to 68 degrees and use it as a switch to prevent the air conditioner condenser from running when below 68 degrees. And use in-line with the yellow wire.
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Casement Windows: Install Thru Wall A/C Indoors & Exhaust with Ducting

A family member has a business in a century-old building that only has industrial casement, awning, and pivot windows. There's no central A/C & a mini-split can't be hung outside the building. The ...
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2answers
68 views

What kind of conduit do I need for my mini split AC line?

Running 240V for mini split through exterior wall in conduit from indoor unit to outdoor unit. Cable supplied by mfg is SJOW 16/4 105c 251603 3/8" O.D. Can use 3/4" non metalic flex conduit (...
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Keep blowing 3 amp fuse at furnace

Keep blowing 3 amp fuse on the furnace control board. At the furnace I am getting 240 on the 60 amp breaker at the furnace and I am getting 120 on 30 amp breaker breaker side.
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Head Scratcher: Mini Split Conduit Question [duplicate]

I'm installing a Mr Cool 24K BTU DIY mini split 240v system. It's replacing one that worked flawlessly for 2 years. The manufacturer replaced my original one because of a manufacturing defect - ...
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58 views

Is my HVAC compressor siezed?

My R22 HVAC system stopped working. Trying to see if there is anything else I can do When the compressor kicks on I hear a buzzing sound (presumably when the capacitor is in start mode) and a hen goes ...
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Split air con : getting outside air inside

I have a split air con Samsung SH09APG. It's a typical air con machine, with an inside and outside unit. I was thinking it would be really useful if it allowed the outside air to come inside the house....
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Best vent size for replacing drop-ceiling register with boot for drywall using 8" duct?

I'm replacing my drop-ceiling with drywall in a basement room. Right now there is one register on an 8" duct – the kind where the duct is just open and passes through a perforated 2'x2' grille ...
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39 views

If I build walls surrounding sump pump, water heater, furnace, A/C, will it work stopping flood water from spreading to entire basement?

In the past, my basement was flooded twice. Both of which where lower than 8". I'm wondering if the following works to prevent future flooding of my basement or stop water from spreading to the ...
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32 views

Lennox air conditioner won't cool

My Lennox air conditioner is not coming on? When I put the thermostat in cool mode, the outside unit comes on but the inside fan doesn't start!! If I set it to the off position, the inside fan will ...
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38 views

How to remove a clog at the backside of an air conditioner?

I have an old ductless split-type air conditioner that is leaking water on the inside. I have verified that the drainage hose is clear and that the main condensation collection tray is clean. The ...
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1answer
33 views

Leaking AC duct

I bought a house back in March and haven't noticed any issues with the house until last week. About a week after Henri made landfall in CT, I noticed the carpet in the basement was a little damp. Upon ...
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3answers
139 views

How can I get an old air conditioner, partially disassembled, down the stairs?

I'm not young enough or strong enough to carry a 50-lb air conditioner down the stairs from the second floor to the first floor to dispose of it. This is an old house with steep stairs with narrow ...
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1answer
41 views

Can I use a portable air conditioner/dehumidifier as a dehumidifier in the winter at cold temperatures?

My portable air conditioner can also be used as a dehumidifier. I can use it in the summer/spring both as air conditioner as well as dehumidifier, and it works really well as a dehumidifier under hot ...
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20 views

How much clearance is needed between window and wall for portable AC hose?

We have a project upcoming to replace the windows in our condo. We have the option to add portable AC hose vents to the spandrel, and I need to decide on the placement of the spandrel in the windows. ...
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2answers
66 views

Bypassing thermostat,

It is hot and my AC isn’t turning on. I bypassed the thermostat at the furnace, and the AC came on. How long can I leave the thermostat jumped? It is late and I can’t replace the thermostat until ...
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42 views

Installing a larger HVAC blower motor

Recently our A/C started severely underperforming. The culprit turned out to be a clogged condensate line which leaked through the unit and deposited a gallon of water into the blower housing. After ...
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2answers
85 views

Attic HVAC BTU considerations

I live in central New York and will be installing a furnace and coil in my unfinished attic with an A/C unit outside to condition 800 sq/ft of upstairs living space. The attic a standard overhang (no ...
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1answer
25 views

Air-conditioner fan & compressor fails to start

The unit is air conditioning only and is older (unknown age but at least 10 years, possibly 25). Power was restored to the outdoor compressor and fan: the fuse was somehow dislodged and is now back ...
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23 views

How to prevent vents from leaking?

It appears that in my house the cool air from the vents is causing moisture to condense around them and drip down the walls. Is there any way to prevent this? Also, is this in any way potentially ...
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68 views

Help: Can I install a through the wall ac unit in a window?

Can I install a through the wall ac unit in a window? My landlord bought a wall unit and installed it in a window in my bedroom. there is not casing on the back and it will be exposed to rain and snow....
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96 views

Mitsubishi mini-split not cooling very well

We have a 12,000 BTU Mitsubishi mini-split cassette in a two-car garage in Houston. The garage is insulated on two sides and not insulated on the wall that faces the sun. The door is insulated. The ...
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102 views

How I can find out what size solar panels I will need in order to power a single air conditioner?

I am thinking to buy an air conditioner, but I want to power it using solar power in order to avoid increasing my personal CO2 emissions. I am thinking to buy a small 9000BTU one and for personal ...
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3answers
79 views

Should I add a second air conditioning unit or enlarge the existing one?

My home has central AC with a single condensing unit outside, in the shade, that struggles during the summer. By struggle I mean that it runs constantly and fails to cool to the set temperature. I ...
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1answer
42 views

Expected behavior from Carrier control unit?

I have a Carrier AC in a new home that I don't use often. It is about 90 degrees outside. I use the down button to set temp to 69 degrees. The AC box outside turns on. The vents may blow cold air but ...
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72 views

Can I use 2 5,000 BTU window AC units in my 16'×40' Park Model trailer?

We are dealing with extremely high temperatures this year:100°-119° already just since the last part of June. I live in a 16'×40' Park Model trailer and with a ceiling fan & a box fan combined ...
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1answer
77 views

Does the inside of a register boot need insulation?

I am talking about the inside of the register boots I have installed three new register boots, all of which had one inch of fiberglass insulation on the sides and top of the inside. Sadly though, the ...
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1answer
80 views

Conduit for Outside AC\Heatpump

Need to run conduit for a new AC\heatpump. Main panel is in the garage. Looking to go through the wall to outside pretty much right at the panel and run it all on the side of the house. Outside the ...
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1answer
51 views

Do you need to clean inside of a window air condtioner?

I've been living in an apartment for about 6 years now. I've never used a window AC installed in this unit. I just cleaned up the filter and started using it a week ago and I cough more than usual. I ...
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1answer
51 views

Does a portable AC with inverter makes similar level of noise as one without inverter until it reaches target temp?

I bought a portable AC with dual inverter technology after hearing that it makes less noise than one without inverter technology. I was surprised that it is actually very noisy. It makes more noise ...
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1answer
53 views

How Should I Reuse or Replace this Ductless Lineset Cover?

Should I insist on a new line set for this ductless mini split replacement? How should I do the lineset cover given that the current setup can't be easily opened? The ductless mini AC at our Cabin ...
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1answer
130 views

What gauge wire can I use for my mini split A/C unit and condenser?

I purchased a mini split A/C unit with 20-amp double pole breaker. I ran 20 feet of 12-gauge wire outside to my Siemens Fuseless quick disconnect box, which came with flex conduit and 10-gauge wire. ...
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1answer
66 views

Redirecting airflow from window AC

I want to redirect airflow from window AC. It does not have ability to direct airflow up, away from occupants; just left and right. I was looking at floor air deflectors. What other options would I ...
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1answer
63 views

AC Dripping A LOT after a rain

When I turn on my window AC after a rainfall, water pours out causing a problem on a terrace below - rain seems to be collecting. I've seen these magnetic foam AC drip cushions meant to reduce noise ...
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4answers
893 views

Portable ac to cool another room?

I'd like to cool one of my rooms with an ac but noise is a big limiting factor. Is it possible/feasible to put an ac in one room and somehow have it vent the cool air out into another room with a long ...
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41 views

Split multi-zone air conditioner (not a heat pump)

I'm considering adding air conditioning to my home in Seattle. I have a modern, high efficiency gas furnace for heat. It would be easiest for me to add air conditioning using mini split technology. I ...
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4answers
83 views

Heating and cooling for insulated shed [closed]

I have a 120 sq. Foot shed. That I’d like to insulate and put climate control in. The walls are full height, and it would have an attic area after insulation/drywall installation with the 30 degree ...
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3answers
75 views

How to support a window AC unit for a dormer window?

Does anyone have a solution for installing a window AC unit they've successfully used for a dormer window (meaning one which has part of the roof sloping down below the outside bottom edge of the ...
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1answer
54 views

Hmm new AC unit not blowing cool air now

Have recently installed a new AC split type system, 4 Ton unit. Has been fine until today it seems. For some reason its not blowing cold air. Volume of air flow seems fine. Checked filter, its ...
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Is there something wrong with heat pump + Empire furnace?

I've been asked to look into A/C for a 1600 square foot building at our lodge. The gas furnace is old and tired, and on its last legs. There is a top floor that is 2 rooms subdivided, and a well ...
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63 views

Wiring for AC unit

I am planning on having central AC installed, and am planning on pulling a permit and performing the electrical work myself to save on costs. I’m comfortable with the electrical side of things(former ...
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35 views

Fan Setting For Portable Air Conditioner

Optimal fan speed for a window air conditioner has been addressed before. However, the thermodynamics are different for portables. A single hose portable (dual hoses too big for small rooms) sucks ...
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3answers
168 views

Using a nema 6-20 outlet with a typical 5-15 device

I have a nema 6-20 outlet that worked with a window air conditioning unit that I recently replaced. The replacement unit has a typical nema 5-15 plug. The new unit pulls 11.5A and uses 110V. With only ...
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2answers
167 views

Draining LG LW5016 air conditioner

I have a LG LW5016 air conditioner. It is a room ac that is 5000 btu. It seems that water is building up inside of it. Is there a way I can drain it?

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