Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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45 views

air conditioner unit [closed]

I had a HVAC to came out said he put in 11 pounds it took 5 minutes. And he was smoking a cigarette sitting on the Unit while he was putting it in. I paid 1045.00 He also said he replace the ...
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3answers
157 views

Dehumidifier to help a portable AC?

I have asked How to get cold air from one room to another now I am thinking, the AC will be in the bedroom but what if I set up a dehumidifier (perhaps with a pump) in the kitchen connected directly ...
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1answer
370 views

How to get cold air from one room to another

This is the very rough outline of my flat: +----------+ |Bedroom | W \ +---+----------+ |Ba |Living |lc |room |on | |y | +---+----------+ There is no window on the living ...
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2answers
40 views

Power consumption of air conditioner

Hey guys, Can anyone please help me how to estimate the power comsumption of an air conditioner. I know it is hard to get the exact number due to the different conditions that the AC might be running ...
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3answers
4k views

Condensor went, HVAC guy is blaming electrician, is this possible?

My brand new HVAC unit, the condensor died. The unit has a sticker that says the following: Minimum Circuit Ampacity 32 amps Max Fuse / Breaker 50 The electrician ran a 8 gauge wire with a 40 ...
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1answer
158 views

What the purpose of a label on top of a capacitor?

I notice that some HVAC capacitors have labels printed or sprayed on them like the black "negative circle" label on top of the capacitor in the picture. What is it supposed to indicate?
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0answers
91 views

What to do to reduce the humming noise of an AC unit?

I have this ac unit: When I turn it on it makes a noise as soon as compressor starts. It's a humming repetitive noise. I thought it was the fan, but when I put it in fan only mode it does not make ...
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1answer
43 views

How to improve my air cooler?

I recently grabbed a cheap (as in 70€) air cooler to chill a room (45m³). Expectedly the inner workings of the cooler are quite basic, a pump circulates water from a reservoir through some kind of ...
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1answer
47 views

Improve HVAC in single upstairs room with vaulted ceiling

Setup: Our house is a two-story built in 2011. We have zoned HVAC off a single unit with electronic dampers. The upstairs has three bedrooms and two bathrooms. The master bedroom is the only room ...
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0answers
44 views

Leaking portable air conditioning unit

I have had this Delta portable air con from Aldi for several years. It puts a tube out of the window and collects water in a side bucket. It has worked well albeit noisy but not needed often so in ...
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1answer
29 views

Unable to turn off cold water flow in airconditioner, possibly due to solenoid valve

We had an accident with air conditioner yesterday where controller mounted to the wall shortcut and broke. I had to turn off electricity switch for airconditioner, but woke up this morning realising ...
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1answer
57 views

Old Outside A/C Unit - replacement vs repair?

I recently had my home A/C system inspected and I am trying to decide how to act on the results. Can anyone offer guidance? Here are my notes from the A/C Inspection Amps on outside unit are ...
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4answers
930 views

How to diagnose and fix apartment AC that makes intermittent whooshing noise

My AC recently (I think, it's pretty new, possible I just didn't notice before) started making a whooshing noise. It sounds kind of like a sudden gust of wind, but it repeats every few seconds. ...
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2answers
62 views

Are air vents in a house intended to let some air through when they're closed? Would it be bad to completely seal it?

I would like to be able to use the vents in my house in a way that targets specific rooms/areas more than others. Sometimes I want to completely close off a room from being temperature-regulated by ...
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1answer
54 views

Attic Temperature Affected by Insulation

I recently moved into the attic and converted it into my bedroom, There was insulation on the floor but none on the walls which made it uncomfortable to live in considering its the summer. I got a ...
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3answers
112 views

Help diagnose a compressor problem

My fan on my A/C compressor unit seems to start and even spins up to a reasonable speed, although not quite the speed at which it ought to spin, but then 5 seconds later slows down to a very low speed ...
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1answer
65 views

AC in Closed Space

I’ve rented space to build an art studio in an in-air conditioned space. There is a wall dividing the basement into two sections roughly 15’ x 30’. The space above is air conditioned. I would like to ...
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1answer
273 views

Sealing middle of sliding window with portable air conditioner installed

In my bedroom I have a one hose portable AC unit, because my only bedroom window is a sliding window. Currently, I set up the window kit in the day and take it out before bed. The reason for this is ...
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1answer
507 views

Using automotive R134A in my refrigerator?

Can I use automotive R134A in my refrigerator without damaging anything?
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2answers
107 views

HVAC is suddenly blowing room temperature air—compressor, fan still turn on

I intend to call a repair person, but I just want to make I've exhausted possibilities that don't involve messing with the refrigerant lines. The A/C was working yesterday with no problems (outdoor ...
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2answers
153 views

How can I temporarily attach anti-bird spikes to a window air conditioner?

I'm trying to stick on anti-pigeon spikes on top of my window air conditioner and want a non-permanent solution that I can take off when I put it into storage. Is there something I can use that's ...
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1answer
763 views

Putting portable air conditioner hose in bucket of water

Does it really work to use the hose to heat water in a bucket? I do not want to leave my windows open at night for the hose to go outside. I have heard the hot air from the portable air ...
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2answers
2k views

Why does my Goodman a/c blower motor randomly not work?

My blower motor stops working almost every night! I have no issues during the day. If the motor kicks on it works fine but when the thermostat reaches temperature and shuts the unit off it’s a 50/50 ...
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1answer
42 views

Fan comes on but the air conditioner does not

During hot days when the air conditioner is on a lot it comes to a point in the evening when the air conditioner shuts down and the fan (from furnace) stays on. This will go on all night as the house ...
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2answers
2k views

Is the transformer bad on my Central Air Conditioner?

Need some help diagnosing a problem. My very old central AC unit isn't working. It's just AC and about a year ago I connected a C-Wire to the air handler when swapping the thermostat for a wifi ...
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0answers
87 views

New portable air condition won't cool properly

I recently purchased a Hisense AP10CR1W. It is a 10k BTU AC and the room is about 300 sq/ft. It has been working perfectly until a recent 100 degree day. Ever since then it does not cool during the ...
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0answers
2k views

Carrier Infinity System says “System Malfunction”

On this, the day temperatures reached 95, my AC stopped working. Here are the symptoms: The thermostat says "Infinity System - System Malfunction Call Technician". The condenser outside is spinning, ...
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0answers
89 views

Amana Prestige Air Con fan won't spin

I have an old Amana Air Con unit that stopped working. The fan won't spin. The condenser kicks in. I can manually spin the fan and it goes like a champ. I have replaced the cap already. Any ideas or ...
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1answer
54 views

Ductless Mini Split Efficiency

It’s well known that a single zone ductless system has extremely high efficiency. I’ve seen advertisements for SEER 20 or SEER 30 systems. My question is what is the SEER rating for a multihead system....
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1answer
125 views

How can I tell if my new AC is overloading my home electric service?

I just installed a mini-split A/C system. It is 2 outdoor compressor units and 7 indoor head units. (I did 95% of the install myself, toot toot) It was working great, but the weather had been ...
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3answers
50 views

How to protect the AC from power spikes - a hardwired surge protector, or UPS?

As I understand, power surges can damage the AC boards, compressors and fan motors. Looking into hardwired surge protectors I found devices ranging in current, maximum protecting voltage and ...
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0answers
67 views

Start capacitor size

Looking for some advice. My Trane A/C 5 ton outside unit has provisions for the Trane BAYKSKT252A start assist kit. This appears to be a standard 5-2-1 start capacitor, so I got a 5-2-1 4-5 ton kit, ...
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2answers
138 views

Minimum ampacity for circuits in a home from 1964

I’m attempting to fact-check a seemingly very dubious claim from my landlord, but I’m having a great deal of trouble finding useful information on older electrical codes, especially in a form that I ...
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1answer
111 views

Are there any consequences to not running air conditioner in a hot and humid climate?

The AC in my house has been broken for several weeks, during which time the temperatures have gotten into the 90s with high humidity (heat indices over 100 the last few days). Because the AC is broken,...
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2answers
63 views

Should HVAC registers be closed or open when HVAC is broken, & window AC units are in use?

The property in question in located in a hot climate, with high-90's being regular during the summer. The compressor has died on the property's HVAC, and for the time being, the space will be cooled ...
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0answers
61 views

What is the max MERV or MPR air filter that a 13 SEER HVAC can handle?

I want to determine the maximum MPR (or MERV) rating that our HVAC/furnace can safely handle. We have allergic rhinitis that worsened after moving to this high-pollution, dusty city. There is ...
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1answer
49 views

central air and high efficiency furnace

When the central air is running, cold air blows outside through the intake and exhaust pipes from the HE furnace. Is this normal? Can I block/seal off these pipes for the summer and uncover them ...
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1answer
92 views

How to vent garage in summer?

Our garage faces nearly directly west, meaning it gets full afternoon sun. It also has no attic above it - meaning it has a fair bit of roof. There is batt insulation along the roof but the garage ...
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1answer
4k views

Best angle to tilt a through-window air conditioner?

My last through-window air conditioner started smelling moldy after a year or two. Improper drainage, I guess? The instructions always say to install the air conditioner at a "slight tilt" so the ...
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1answer
62 views

Can I use a combination of two mobile air conditioner units to cool house?

We have a one story house. It’s 1040 square feet. Our central air unit, which was about 20 years old, finally broke. We’ve been told it’ll be about $4,000 to replace it and that amount of money simply ...
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1answer
139 views

Is it possible to use ducts with a window a/c unit?

I'm trying to cool my home recording studio, but my window a/c unit is far too loud. I have a closet in the room which has a window and I was wondering if/how I could use ducts to put the a/c in the ...
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4answers
2k views

Will adding a cool air return in the basement help with summer AC power usage?

Pretty much the title. I have a full basement. Part of it is unfinished and has the water heater, furnace, and washer / dryer. The other part (roughly 1/2 of the total space) is partially finished. It ...
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3answers
2k views

Portable air conditioner produces nasty smell in fan mode after running AC

My Haier HPN12XCM Portable Air Conditioner, 12000-BTU air conditioner produces a horrible smell whenever it is in fan mode after I run it in AC mode. To reproduce the problem, I do the following: ...
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2answers
154 views

Whats the maximum power in WATTS for this type of cable?

I just bought a Hisense A/C that uses up to 1800 WATTS of power. Im worried about my electrical installation, mainly if it can resist such a big power consume and if its safe using it large periods of ...
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2answers
51 views

Window unit question btu/sqft

We live in a 260sf tiny house. Currently we are running a 5k btu and an 8k btu and they are not cooling well enough. Both A/C's are about 3 years old. This is only 1 room + a bathroom so only a single ...
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1answer
51 views

Maximally Sealing Window Air Conditioner

I have a window a/c unit (~23"w) I install into a small window (30"w) every summer. What are the most efficient materials to use to maximally seal the large & small gaps to keep the hot outdoor ...
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1answer
63 views

AC Capacitor Or Another Problem? (And What Type Of Capacitor?)

I'm wondering if anyone can help me identify the issue here: My AC went out. I'm positive there's a capacitor problem since I can actually kickstart the fan motor but it doesn't have any effect on ...
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2answers
5k views

Should I block my basement air returns to better cool my top floor?

My house has three floors (basement, main floor, and upstairs) and the top floor is much warmer than the basement, especially in the summer. I have an air conditioner attached to my furnace, and it ...
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2answers
58 views

In summer, should attics simply have fans or other ventilation?

The house we have in the US south seems to function in this way in summer: I know nothing about AC/insulation systems but it seems that: If there was simply airflow through the attic, it would stop ...
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1answer
74 views

Air conditioning thermostat wiring help

Really need some help. I was working on the wiring of my home air conditioning and managed to mess up the low voltage wiring. I was installing a wifi thermostat and opened the panel to add a blue ...