For general questions regarding cooling your home.

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33 views

All outlets on one 15-amp circuit, need AC unit

The central AC in our apartment is not working effectively in the summer; we are running the AC continuously for 14 hours a day to keep the temperature below 80 degrees. As you can imagine, our ...
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1answer
31 views

What could cause my in-wall air conditioner to blow 3 power boards?

I've had my house for nearly two years, and suddenly my in-wall air conditioner stopped working. I replaced the main power board, and it worked again...for a week. I replaced the main power board ...
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0answers
17 views

What is causing this air-conditioning unit to cool on cold days?

This is a temperature log from a reverse cycle air conditioning system that has run fine for getting on for 30 years. It has suddenly started to blast out cold air on days when it should be heating. ...
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0answers
16 views

how to install a casement window ac unit in a standard horizontal window?

Ok... I have scoured the internet. I was given 2 casement window ac units. Both of my heat pumps were stolen and this is an army wife turned widow make do type situation for while I save to replace ...
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24 views

Issues after capacitor replaced on AC unite

Had a checkup on my AC/ furnace a couple weeks ago. The technician said the capacitor leaking oil and not pulling enough amps. He recommended me getting a whole new system. (my house built 6 yrs ago) ...
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2answers
40 views

Compact width Window Air Conditioner

we would like to install a window air conditioner in our living room window. The window is quite narrow (18.5" wide). The room is fairly big, ~400sqft. We would like to install a 10000 BTU window AC ...
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1answer
30 views

Honeywell RTH7600 does not responsd

Just installed new Honeywell RTH7600. All wires are correct and the unit displays fine. The issue is that heater and AC do not turn on at all. I even put the fan to ON instead of AUTO and that does ...
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1answer
30 views

AC continues to run for several minutes after shutting off

When I turn off the AC it continues to blow cold air for several minutes. I realize this may be an energy savings feature, but I'd like to know if it is possible to disable it. In other words, what ...
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3answers
100 views

Can I use an outlet splitter with my air conditioner?

I live in an old apartment building, and there is only a single outlet anywhere near the only window in my living room. My Air Conditioner works great with it, but now I can't use the desk lamp and ...
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1answer
29 views

Should I run my condensate pump after pouring bleach water into it for cleaning?

After I add the 50-50 mix of bleach water to the condensate pump to clear out the algae, do I add water to the pump? On top of the condensate pump it says "do not run dry" so I was wondering do I need ...
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1answer
116 views

AC unit won't turn on: both inside blower fan and outside fan unit won't turn on

AC unit won't turn on: both inside blower fan and outside fan unit won't turn on. It is as if I had gone to the circuit breaker and cut the power to the whole HVAC system, but I didn't. I've been ...
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1answer
43 views

Why won't my air conditioner work after a power outtage?

The air conditioner does not work at all. I'm wondering if it's a power problem? The thermostat isn't even on and doesn't show a temperature. Before it stopped working the power had gone out due to ...
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3answers
283 views

How can I turn the light off on my fujistu halycon split unit

I run the A/C at night and the unit has green lights that turn on to indicate its on. How can I turn the lights off without turning the A/C off?
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1answer
66 views

Is my AC right-sized for my house

2 years ago I had a Bryant 2 Ton 13 Seer Air Conditioner + new furnace and coils installed in my 2800 sqft ranch style house with 6 bedrooms and 2 baths split evenly between the basement and main ...
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3answers
66 views

A/C not keeping up

So, the first warm-ish day of summer finally showed up in the Black Hills yesterday and I noticed that our central air conditioning was not really keeping up... the thermostat was set at 72, but the ...
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1answer
57 views

How can I vent a portable A/C unit through bars on a window?

I need a way to fit the vent from my portable a/c unit through the bars on my window. The window bars are installed for security purposes and the average hose is way too wide. Any suggestions?
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0answers
25 views

Home air conditioner blows capacitor

My air conditioner tripped the breaker, I replaced the breaker and checked and cleaned the filters. so after some research I found out the cooling fan was not working. So tested the capacitor and it ...
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0answers
37 views

Repair A/C Evaporator Coil

The repair man says that leaks are most common in a place that is not repairable without using leak sealant, which would void a warranty and his company doesn't offer that service. My system is using ...
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1answer
38 views

While vacationing, is it worth augmenting AC with a dehumifier?

Per Does running a dehumidifier with an AC unit save money?, I understand that while a house is occupied, it doesn't make sense to run both an AC unit at normalish temperatures (maybe 75), and a ...
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0answers
40 views

20amp ac unit shut off all my power. is a 110 unit lower?

If we use a twenty amp ac window unit in blows out our power. Someone offered me a 110 unit. Does that have lower amps? Ithat lower?
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3answers
83 views

What size air conditioner for a ~230 square foot room with 10 foot ceilings?

This will be my first time purchasing a window unit, and I'm a little confused. Most charts indicate that a 7,000 BTU unit is appropriate for a ~250 square foot room, however from what I can tell, ...
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2answers
44 views

How do I properly size a 120v inline power relay to control a small air conditioner with my home automation system?

I have a 5,000 BTU, 115 volt, 4.8 amp, window-unit air conditioner I'd like to control from my home automation system. I think easiest thing to do would be to plug the unit into an inline rely module ...
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0answers
127 views

Why does my outdoor AC unit make a screeching sound when it shuts off?

MY AC cools just fine. But when it cuts off, the loud screeching sound outside can be heard from far away. This only happens when the AC goes off. There are no other weird sounds, any other time. ...
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0answers
44 views

Does an outdoor AC condenser unit (Heat Pump) require lubrication? Pic included

I have been in my house for 11 years now and every 3 or 4 years I have been taking the lid off my condenser unit and lubricating it. I just don’t know if I am even supposed to do this, but it make ...
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0answers
26 views

Air conditioned made a sound while running and stopped working

Air conditioned made a sound while running and stopped working,I guess its probably short circuited.How can I repair it by myself? What all tools do I need?
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24 views

HVAC 3A fuse shorting on cool

I recently came back from a trip, and the thermostat was still working. On turning the AC on, the wall-powered thermostat decided to die. Upon investigating in the attic, I noticed the 3A fuse had ...
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2answers
57 views

Leaking portable air conditioner

We have a portable air conditioner that we used pretty heavily over the weekend. When I woke up this morning, it has leaked water all over the living room floor. Any ideas of why? Thanks!
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0answers
28 views

My 10-year AC gives out every couple of years

In 10 years my AC fuse has gone out 3 times now; the last time, 2 years ago, the panel was replaced but before that the fuse was replaced. One electrician told me that because my panel is in the ...
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2answers
72 views

Can I pump down an Air Conditioner myself?

We are planning on having a new concrete patio poured in a couple of weeks and need to move our AC unit to make way for the slab. Is it possible for a layman to pump down the coolant and move the ...
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0answers
28 views

Preventative maintenance: mold in window Air conditioner

I just threw out a perfectly good window air conditioner because it had black mold stinking the place up. I know it can be cleaned, but I don't want to take any chances. I bought a new one and was ...
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0answers
69 views

Split AC installation: Need for a Vacuum Pump & Nitrogen cylinder

I bought a new Split AC (1 ton, LG made) and the company sent home a technician to install the unit. The guy arrived and took measurements and I quizzed him a bit about his kit and strangely it ...
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0answers
17 views

Solution for A/C Condensate Drain Line when it is not possible to drain it elsewhere? [duplicate]

I have a split A/C system in a room that runs on low 24 hours a day during Summer that unfortunately cannot be connected to any drain or pipe and which therefore requires a bucket to be used to ...
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1answer
70 views

internal fuse on air handler blows every time it shuts off

air handler for air conditioner has worked fine since I moved into the house but this year both times the air conditioner has turned on it has not restarted. Both times so far the problem has been ...
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1answer
100 views

heat pump/air conditioning wiring to thermostat

We decided to change the thermostat of our heat pump/air conditionnning unit. First 3 images are the old unit. The first 3 wires(1 and 2 picture) yellow red orange were not connected to anything, just ...
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1answer
65 views

How to estimate if an old AC is worth replacing?

Have a window AC unit that's from 2001, here are the specs: Manufacturer: Kenmore VOLTS: 115 Cooling BTU/HR: 12500 Cooling AMPS: 11.6 Cooling WATTS: 1275 Cooling EER: 9.8 The average electricity ...
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1answer
69 views

Appropriate register for duct size?

So I asked a long-winded version of this question in another thread, but haven't really received any good responses yet. I'm going to condense and try again... There is an 8" duct feeding a 6x12 ...
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1answer
62 views

Is it possible to plug an AC into a kitchen stove hood exhaust?

I live in an apartment and need to install air conditioning to cool down one room (about 20 m2), from time to time (1-3 hours per sunny day, for a total of 3 or 4 months a year - typical European ...
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1answer
104 views

AC not cooling using heat pump

I just bought a house and this is my first experience with using a heat pump. I have put in several hours of research and understand how it works but I need someone that has experience to give me some ...
2
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2answers
114 views

Are there optimal positions for A/C and heat register grills to be facing?

I noticed a while ago that some of my A/C and heat register grills are facing the walls and not the room (the insides of the curves on the grills face the walls) in some rooms but not in others. My ...
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2answers
66 views

Emerson Liebert Air Conditioner Fan Runs Abnormal

We have 2 Emerson Liebert air conditioners inside a datacenter. Issue is not a home issue but devices are all same and I supposed finding some expert here. Here is the thing: This 2 devices are ...
2
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1answer
121 views

The reliability of inverter air conditioners in humid climates with salty sea air

I'm considering buying a new split unit air conditioner for my home. Actually, this will be for a room that is planned as a short-term rental. I'm located in Bombay, India, now referred to as Mumbai. ...
1
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1answer
30 views

Good replacement actuator?

I have 2 Belimo actuators that control dampers for A/C ducts in my house that the motor has gone bad on. I can't find much info about the model "LM24-T US" so I think it has been discontinued. I ...
2
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2answers
98 views

Combining Air Conditioner with Air Purifier

I have a small 5th floor flat, with high ceilings. The sash windows, which are tall, face south. There is a very busy road underneath the windows. Two rooms have these windows. It's noticeable that I ...
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0answers
36 views

What to look for in central air installation?

I'm having an HVAC company install a York central air unit in my house today, and I'm wondering what things I should be looking for in the quality of the installation? Existing York central heating ...
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3answers
229 views

How can I prevent my furnace and A/C from slamming doors?

What specifics will I need to collect to figure out if our furnace and A/C are sucking too much at the source/intake? I don't know the proper terminology for these things, do forgive me for any ...
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1answer
84 views

Is my HVAC system unbalanced?

I bought a home back in August and the previous owner had a new 3-ton HVAC system installed. Basically right now the HVAC is located in the upstairs hallway, and the way the duct is set up is there ...
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2answers
4k views

Can I run a central air conditioner in the winter?

What happens if you run a central air conditioner when it's below freezing outside? Is this expected to work? I know, it sounds crazy, but that's because you don't live in an overheated New York ...
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2answers
63 views

HVAC system setup

I have a builder building me a home right now and we had agreed to set up two separate heating and cooling systems for the first floor and second floor of the house. I raised the issue the other day ...
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0answers
64 views

Can you hardwire a residential through wall A/C to a 3H/2C thermostat?

I have a boiler with radiant baseboard throughout my home with four zones of heating and two through wall air conditioners and Aprilaire 350 Humidifier. I am upgrading my thermostats to the Honeywell ...
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0answers
36 views

Buying used heat pump/AC

I'm planning to buy and install a used heat pump/AC at some point in the near future (probably looking for sellers on Craigslist or similar), and want to know what I should look for to know if the ...