Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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14 views

HEPA filter for GE portable air conditioner?

I have a GE portable air conditioner like the one shown below and am trying to determine whether there exists (OEM or otherwise) a HEPA air filter I can install in/on this device. I am unable to ...
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1answer
59 views

Why is an aircon with 34000 BTU cooling capacity uses less current than a 14000 BTU unit?

I plan to buy aircon but have a question. My friend office has 2 aircons. Both 220 volts. 3 toner 34000 BTU cooling capacity with 16.4 A rated current. Stand unit model Carrier CP-A280MA. I cant read ...
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27 views

Compatible filter for a Hiyasu HR-24LA HVAC unit?

We bought a house with the A/C installed. We found a lot of dust, and realized that the filter was entirerly missing in the indoor unit. I have found it in the Hiyasu catalog, and I found a manual for ...
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23 views

Air conditioner blows erratically

I have a Samsung split air conditioner and the internal unit blows unevenly; I take off the lid that contains the filters and stops doing it. I remove the filters, reinstall the lid, and blows ...
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1answer
28 views

Is it worthwhile to replace evaporator coil?

My AC condenser is done for and needs to be replaced. The evaporator coil is 15 years old and still working. I could get both replaced at once, or just replace the AC condenser. Doing both will cost ...
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2answers
59 views

What's the point of AC fan speed?

Does higher fan speed make the room cooler? But then, if the thermostat is set at a certain degree doesn't the AC keep the room at that temperature regardless of what speed the fan is set on? What ...
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1answer
28 views

Installing Ecobee 3 Smart Thermostat in Apartment

I live in Scottsdale AZ and I just purchased an ecobee smart thermostat. I’ve tried multiple ways when wiring up the thermostat. I followed all instructions closely. Can anyone help. The new ...
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2answers
47 views

How best to isolate dirty power caused air conditioners or other motor driven devices at the dirty device itself?

I have two air conditioners that are the source of some voltage fluctuation/line noise in my home. The two A/C's running at the same time is definitely and unambiguously at fault. This is primarily a ...
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15 views

How to run new exterior A/C drain line

I'm trying to replace my A/C drain pipe. It was draining into an old PVC pipe contraption that did nothing - water was leaking all over the brick and foundation. I pushed the PVC to the side and ...
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1answer
54 views

What is the difference beween setting the air conditioner to 16C vs 30C? [closed]

Recently I thought; What is the difference between the way air conditioner cools a room to 30c vs 16c. In my mind, there are two possibilities: First, the temperature in the front pipes (in the unit ...
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4answers
45 views

Can I keep mold out of wet rags?

I am cleaning windows (small business) and that generates a bag of wet dirty cotton towel rags each day. I wash the rags each day, and need to store those until the end of the week, when I take the ...
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AC not blowing cool air, Contractor said HVAC unit is perfectly fine and that it has to do with my smart thermostat (Ecobee 3)

So basically I changed out the filter on my HVAC unit (National Comfort Products, Model CPG41238-U23) and after I did that the AC stopped blowing out cold air. It was working completely fine until I ...
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1answer
31 views

Is TXV required when an appropriate piston/orifice is used?

I had a Goodman GSX140181 1.5 Ton 14 SEER Air Conditioner R-410A installed with a Goodman CHPF3636B6 3 Ton Horizontal A Evaporator Coil installed by a contractor. It came as a kit, along with a ...
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1answer
60 views

Is negative pressure bad and how to fix?

I have a one story house and I think there is a negative pressure problem. If the central a/c is on and I close the hallway door the hallway heats up like an oven. This hallway leads to all the ...
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29 views

What is the best way to ensure new air conditioning units stay level?

We live in Northern Illinois (-20F in Winter + 1-2 ft snow to 100F summer) and have two a/c units which are now 30 years old and it is time to replace them. They are located on the north side of our ...
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37 views

Cold air blowing from return air vent

Cooling stopped working on my second floor zone, and cold air was blowing out of return air vent. I turned off the power to HVAC , it didn't work. When I turned off the thermostat of my second floor ...
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26 views

Is there an easy fix for bad air balancing?

This is my situation: My condo has central heating and air with a zone for each of the two floors, but the balancing of the system is pretty bad: Our upstairs master bedroom and our upstairs office ...
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5answers
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Do I really need an air conditioner filter?

Do my AC air intake vents really need air filters? Is there any downside to removing them? Like are the blowers expecting a certain level of resistance from the filters in order to work properly? ...
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2answers
57 views

Is it worth of replacing central AC coil?

my central AC is a 16-year old Trane. According to inspector, the compressor is still good and all the conditions seem to be good, except the coil is leaking. It is an old model so it uses R22. As it ...
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35 views

Central a/c intake seems to let hot air in from attic. Is this on purpose?

We live in the desert where it's quite hot. We have a 2 story with central a/c with seperate units for bottom and top floors. While the a/c was off i noticed what felt like hot air from the second ...
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1answer
34 views

Portable AC leaking water…how to locate problem?

Have an older portable AC -- maybe 10 yrs old. Has been sitting in the garage unused for a couple of years. Gave it to my son to use and after a couple hours of running he reported there was a large ...
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1answer
122 views

Portable AC Port in Apartment Wall

I recently purchased a Honeywell portable AC unit for my apartment but there's two competing issues: I only have a sliding door in my apartment (no windows), and the adapter kit to vent through the ...
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1answer
20 views

YORK AC unit rusted support arm

I have an old YORK ac unit still running R22 and have recently cleaned the entire unit inside and out. As I took apart the unit, one of the 4 corner supporting outside vents was rusted completely and ...
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3answers
38 views

How to visualize air circulation between rooms?

My house gets very hot on some days. I don't have a central AC system, and cannot install it because the house is a rental. I have to make do with various floor fans and portable AC units. There are ...
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2answers
91 views

Why does an air-conditioner need maintenance and a fridge does not?

Does anyone know why an air-conditioner needs regular maintenance while a fridge doesn't?
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42 views

Which AC Hard Start kit capacitor I should use?

My AC system is getting very old and I was wondering if I should add a Hard Start kit and with what spec? Here is my AC spec included below and the existing Dual Run Capacitor is 440volt and 40+5MFD.
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25 views

Blaring noise from newish indoor AC unit

Why is my AC making a noise like Mass Effect Reaper every 20-60 seconds and how can I stop this? https://webmshare.com/play/qd07r
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2answers
48 views

Why is my portable air conditioning unit increasing relative humidity?

I have recently purchased a new portable air conditioning unit. For some reason when I am using it the RH increases rapidly. The exhaust pipe goes through the wall and appears to have a good seal. The ...
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1answer
30 views

Adjusting ECM motor air flow

I recently had the following Rheem ROCB furnance installed. https://www.rheem.com/product/ROCB-118P05-M It's paired with a Rheem 5 ton condenser for cooling. However, I feel the air flow is set way ...
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3answers
125 views

AC not shutting of automatically

I recently had new HVAC installed. I am noticing it being little louder than what I had previously. The new system is American Standard 80% efficiency with ECM blower motor. My question is Can I ...
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2answers
76 views

Is my brand new central air conditioner short cycling?

I just had a brand new air conditioner 5 ton condenser, coil and furnace installed in a 3,300sqft colonial in Connecticut. It’s 1am right now, 75 degrees outside with 97% humidity. I have my upstairs (...
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3answers
52 views

Can a through-the-wall A/C unit be mounted in a window?

I've seen many posts about how you can't install a window AC unit through the wall. However, I have the opposite question. Can you install a through-the-wall AC unit in a window? It seems like someone ...
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2answers
67 views

Should my ground-level package unit have a condensate drain trap?

I recently got a new package unit installed to replace the 30-year-old one that came with the house. It works MUCH better than the old one, which had a slow leak and iced up regularly. I noticed that ...
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1answer
29 views

What is the deltaT test for a PTAC AC?

I have a PTAC AC that blows cold air, but barely cools the room. The landlord is claiming its because the room is the livingroom and its an open to the kitchen and hallway. I know that the rule of ...
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28 views

split unit dripping

I have a split A/C unit that runs fine for a bit but then starts dripping. I had a company come out and they poured water into the unit behind the filter and the water drained just fine so they ...
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3answers
88 views

Replace A/C Unit or add refrigerant?

I have a 20 year old A/C unit in my house here in Texas. Two weeks ago, the unit stopped cooling. A/C company couldn't come out until the next day and the house got pretty miserable. When the tech ...
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0answers
30 views

Can I add a thermostat C wire to my furnace's control board if there's already a wire under the screw? [duplicate]

I bought a new WiFi thermostat and it requires 5 wires and I only have 4 currently. I will run a new set of wires from the thermostat to board, however on the board it shows that I have a C wire but ...
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1answer
97 views

Why aren't phase-change heat pipes more common in homes?

Laptops contain very efficient heat pipes, which can transfer heat over long distances with extremely low thermal resistance, hundreds of times more efficiently than pure copper. It seems to me that ...
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1answer
34 views

Mini split minimal pipe length

Quick question - my LG mini split manual says that I need a minimal of 10’ from the indoor unit to the branch box. My question is do I include the 1-1.5’ piping that comes with the indoor evaporator? ...
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1answer
53 views

Upgrade to 200 amp by adding another main panel? [duplicate]

I want to install central air conditioning in my home but my current service is 100 amps. If I were to upgrade to 200 amps service, could the breakers be configured where I have two 100 amp main ...
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2answers
86 views

Best method to cool a garage?

Trying to figure out the best way to cool an attached garage. The garage door is insulated and has weather stripping on the outside. There are no windows and the exterior is brick. We live in a humid ...
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1answer
55 views

Does lengthy refrigerant line between indoor and outdoor unit affect AC performance and result in higher utility bill?

As part of basement renovation, I am moving the HVAC indoor unit for about 30 feet, which means the refrigerant line has to be extended by same length concealed within basement ceiling. Now, I have ...
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2answers
87 views

Why is there a musty smell from my HVAC system even after coil cleaning?

I am having trouble getting rid of a smell in my AC (installed 2016), 2 visits by an HVAC professional have resulted in no luck. Problem: There is a musty smell, from all vents, as the AC is turning ...
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1answer
96 views

Sewer smell in bathroom ONLY when central a/c is on and kitchen sink is running water

This is a weird one, and have come across multiple handymen and none of them can pinpoint the problem when I describe it. Though they have never been in the room when it happens. Here is the scenario.....
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1answer
40 views

No condensation coming from my ac

It's humid out yet there's no condensation coming from my ac. Thermostat set at 78 and that's what temp is inside.
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2answers
72 views

how To Silence a Loud PTAC AC Unit?

I moved into an apartment with a loud (and somewhat not so cooling) PTAC in-wall AC unit. Each room has its own, a total of 3. The land lord is super cheap and only replaced the 8+ year old unit in ...
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1answer
17 views

Window A/C Remote Temperature Sensor

I have an LG LW1217ERSM 12,000 BTU window A/C unit and was wondering if it is possible to connect a remote temperature sensor to the unit. For example, the unit is set to 72 degrees but the ...
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1answer
30 views

Weird filter size for airconditioner

I have a weird size air-conditioner filter that is 414 x 544 mm, which is a little over 16" and a little over 21". When I go to to the hardware store here in Canada, they carry all sorts of ...
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1answer
33 views

Curtains to direct airflow

All the cold air from my AC flows through a stairwell and into the basement. The entrance to the basement is the through a doorless opening on the 1st floor. I am planning to put up a curtain in that ...
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2answers
73 views

Should air be escaping from this?

I have a Rheem Criterion Gas Furnace. At the moment, my air conditioning system currently has low air pressure coming from the vents around the house. I double checked that the fan is working, ...

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