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Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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2
votes
2answers
122 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 ...
0
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2answers
193 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
1k 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 ...
1
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1answer
55 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
3k 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
153 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
3k 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
103 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 ...
0
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1answer
57 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
129 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
57 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
81 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, ...
4
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2answers
143 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 ...
1
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1answer
124 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
68 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
75 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 ...
0
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1answer
52 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 ...
0
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1answer
109 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 ...
0
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1answer
5k 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 ...
0
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1answer
64 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 ...
0
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1answer
564 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 ...
0
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4answers
3k 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 ...
0
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3answers
3k 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
159 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 ...
1
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1answer
56 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 ...
0
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1answer
64 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 ...
1
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2answers
7k 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 ...
0
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2answers
66 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 ...
1
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1answer
82 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 ...
0
votes
2answers
726 views

Turning on AC either resets thermostat or blows fuse

I have an 10-year-old American Standard Freedom 90 HVAC system, with an outdoor AC compressor. My thermostat (Honeywell RTC6580WF 1001) stopped being able to turn the AC on (it could still turn the ...
1
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3answers
122 views

Would refilling an AC with refrigerant improve its performance after 8 years?

I just got a little AC (8000 BTU). It works Ok, I guess its a bit small for the room (20m2) but even just bringing the temp down from 30C to 25C is enough of a difference to stop me from sweating. I ...
1
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2answers
232 views

Condensate drain does not drain properly

My air handler is located in the garage and for some reason it will not drain properly until the fan shuts off.Unfortunately I cannot figure out how to add a photo but it has a vent pipe coming out of ...
0
votes
5answers
4k views

How can I put air conditioning into an apartment that doesn't allow window air conditioners

I would so appreciate an answer to this question. I recently moved into an apartment that doesn't have central air and doesn't allow window units. I live in Los Angeles so this is not going be "chill" ...
0
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2answers
1k views

Sloped ceiling - remove hot air with exhaust fan

I have what I think is an unusual setup of a sloped ceiling that may offer an easy fix to my problem, but wanted to get some opinions from you guys. Our master bedroom, on the 2nd floor (top floor), ...
0
votes
1answer
338 views

How to clean cooling fins on already installed AC unit?

I just installed my window AC unit and then opened it up to discover that the cooling fins have quite a bit of dust caked on it. The dust looks sort of like papier mache and is sticking to the fins (...
1
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1answer
75 views

I want to be able to time my in wall air conditioner. Can I update the controller?

I have an old in wall AC/heater (brand McQuay, Now known as AMANA) in my rented Apt, which cannot be time-programmed. Also it is not possible use an outlet timer because the AC must be turned on and ...
0
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2answers
380 views

Can I use mylar sheets to keep my roof cool?

I have a flat concrete roof with brick tiles on it and a thin layer of cement plaster on top of that. The roof gets near constant sunlight during the summer days, and hence it gets very warm, enough ...
1
vote
1answer
58 views

Why compressor of my Air Conditioner is not working?

Compressor of my AC is not working . My AC is Window type , in window type AC compressor starts if the room become hot then it stops when the room become cold . But today compressor of AC was not ...
2
votes
1answer
72 views

What kind of air conditioner system do I have?

I know this site says 'DIY', but if this question belongs somewhere else, let me know which site is appropriate for this question. Thank you. At the beginning of this month, I had a Coleman air ...
0
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0answers
453 views

How to install an AC bracket without a windowsill

These instructions call for anchoring the AC bracket to the window sill, right where it meets the stool: However, my windows don't have that layout, here's a picture of what mine looks like: How ...
2
votes
2answers
117 views

I have a Janitrol Model A42-15 and I wanti to replace the outside unit, but it takes the dreaded R22

Can you use the new refrigerant with the existing inside unit? If so, what would be units that are compatible with my existing one? My outside unit is a 3.5 ton unit, but I am going to need a 4 ton ...
0
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0answers
1k views

Liquid line of outdoor AC unit is cold but the suction line is at room temperature

Its been a few days ago I bought a new General AC 1 Ton for my bedroom of 118 sq. feet. From the first day of installation I never got the expected cold air from the indoor unit I asked the mechanic/...
0
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2answers
45 views

Replacing Refrigerator Piping

I'm looking to do a little DIY project where I replace the refrigeration lines of my mini-fridge with some clear PVC piping to show what's going on inside. I haven't verified the PVC will withstand ...
1
vote
1answer
72 views

What is a proper size air conditioner for Texas 384 sq ft?

My cabin is in north Texas (aka Hell’s Furnace) and is 16x24. I have R19 walls, R25 ceiling, and R20 floors. The walls are 2x6 and I have 7/16 OSB sheathing and Tyvek wrap between sheathing and siding....
1
vote
1answer
109 views

Air Conditioner Compressor Inoperative

My home air conditioning / heat only blows ambient temperature air through the vents, there is no temperature change through the unit. Inspecting it, the condensor fan is spinning, as is the ...
0
votes
1answer
358 views

What are these 3 pipes on the side of my furnace / AC?

I'm trying to install a whole-home humidifier. I'm wondering whether I can use these copper pipes as supply lines for the humidifier. Any guesses as to what pipes A, B, and (just out of curiosity) C ...
0
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3answers
47 views

Through-wall AC troubleshooting

The AC produces cool air for a short period and then ceases to produces cold air after 10-20 minutes. It will repeat this cycle if turned off for ~1.5 hours What can be concluded from the ...
0
votes
1answer
31 views

Supports for air handler block intake

My air handler is supported by 2x4's which partially cover the filtered intake. I'd say there's 5-6" of blockage over the 21.5" filter size opening. Old air handler replaced after 12 years (due to ...