For general questions regarding cooling your home.

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3
votes
1answer
544 views

Will a board blocking my air conditioning break it?

I have a central air-conditioning system in my rented flat. There is on massive machine on my balcony which blows out hot air when the air-conditioning is in use. The hot air is so powerful that it ...
4
votes
1answer
2k views

How can I prevent water from collecting near the blower fan blades of a portable air conditioner?

I have a GE portable Air Conditioner (APH10AA). It's about 10 years old (I guess; we got it used). It works good (blows cold air), but in the last year or two it's regularly been getting water ...
2
votes
1answer
296 views

What is involved in sizing and designing ducts and ductwork?

I have a one-story house, and it looks like it would be easy to run new ducts myself in the attic. What should I know before trying to design a duct system myself? I have seen ductwork that's metal ...
4
votes
2answers
2k views

Do two 5k BTU air conditioners produce the same cooling power as one 10k BTU unit?

Could you interchange 10k BTU air conditioner with 2 5k BTU air conditioner and get the same result? Or is there a reason why buying one 10k BTU air conditioner is better than having 2 5k BTU air ...
2
votes
4answers
3k views

Can a portable air conditioner be used to reduce moisture in a room?

I live in a flat in an older house and I have the disadvantage of living next to an outer wall. In autums/springs there is a period when the central heating isn't turned on yet, but it's already ...
2
votes
1answer
8k views

How do I install an air conditioner in a larger window?

I have a brand new AC in the box which was meant for another room, but recently had a baby and her room is too hot. I want to use the AC I already purchased, but the max window width is 36" and the ...
3
votes
2answers
316 views

Are clogs in the AC condensate drain common in Florida?

I have a two year old central A/C unit. Every 2/3 months the unit shuts off. I called the rep/maintenance company and they have given me the following response: The cause of the issue is algae ...
3
votes
3answers
735 views

How do I determine if adding an air conditioner will overload a circuit?

I'm going to take advantage of some Memorial Day sales and pull the trigger on a portable AC unit for my "basement-ish" (bottom of windowsill is mid chest, rather than head height) apartment. Before ...
4
votes
3answers
2k views

Can I plug an air conditioner and a chest freezer into the same outlet?

I have a Gibson/Frigidaire through the wall AC unit plugged into a dedicated 3-prong outlet in my a room of my apartment. I'd like to put a chest freezer in my office for homebrewed beer. Is it safe ...
3
votes
2answers
714 views

How to safely install a window AC unit?

I have a standard air conditioner. I have just dropped it into the window and slammed the window closed. I am just a bit concerned that If there were high winds or an earthquake the unit could drop ...
2
votes
1answer
1k views

Why isn't my heat pump system kicking out cool air this year?

I have a Carrier heat pump/air handler system (looks pretty old) with a honeywell T-stat (looks pretty new) and I am not getting cool air. Heat worked all winter, but I have used it in at least a ...
1
vote
2answers
833 views

Is there a filter-reminder thermostat that uses run-time instead of total time?

My HVAC filter is in my crawlspace and is a hassle to change. I don't want to change it more than needed. "Change it every month" is bogus advice because in some months (like May) we don't have to run ...
0
votes
1answer
578 views

How to get rid of a few mosquitoes/gnats that constantly sneak in?

I live in an older house, a duplex. I constantly see a few mosquitoes or gnats sneaking in and biting me at night. It's really annoying. It is mainly on the bottom floor, where the A/C vents go to the ...
6
votes
3answers
3k views

How can I determine why my A/C runs all day?

I have a Bryant AC/Furnace unit. My house is 10 years old. A heat wave hit this weekend & temps got up to 95°F outside. I had my thermostat set to 75°, and it ran all day. The ...
2
votes
1answer
168 views

How do I properly size an air conditioner for a very sunny room?

I'm trying to size a window air conditioner for a room, but having trouble deciding if the usual guidelines are a good fit. The room in question is about 230 sq. feet, and does not have full 8 foot ...
1
vote
0answers
180 views

What type of air conditioner to look for

I'm looking for a portable air conditioner that can be moved from room to room. But the key thing I want is one that does not use a condensation tank. I know they exist because I have seen one. It ...
1
vote
1answer
158 views

HVAC unit won't come on

This morning I noticed that my main floor wasn't cooling. I found the condensation pump full ( little giant model VCMA-15ULS ). I disconnected the hose from the unit to the pump, drained it, dumped ...
5
votes
2answers
7k views

How do I install a portable air conditioning unit in a large sliding window?

I have a large sliding window that is 53 inches top to bottom and I want to install a portable air conditioning unit. The kind that don't sit in the windows but vent to the window. The window ...
2
votes
2answers
125 views

Is a combined AC/Dehumidifer unit more efficient than separate units?

I've just moved into a "basement-ish" apartment; the actual ground level is about at my waist. It's a bit mustier than I'd hoped, and not as cool as I'd like during these closing days of Summer. I'm ...
3
votes
1answer
481 views

How can I protect A/C condenser wires?

I bought a replacement condenser fan motor for my outdoor A/C unit. The old unit was CW direction only. This one is CW/CCW and has 4 wires stick out of the side that change direction depending on how ...
0
votes
0answers
656 views

A/C system reports Limit Switch Stuck Open

Unit is a York GM9S080B12UP11G. When switching thermostat to cool, the system activates the compressor fan. Also, I can hear gases moving through the pipes running to the compressor. However, the ...
2
votes
1answer
446 views

How can I extend this concrete pad?

So the wedge shaped concrete pad thats right up against the house; April 17th, we're having air conditioning installed before it gets to hot out. According to the installer, the unit will fit on the ...
1
vote
1answer
3k views

AC Unit Blow Warm Air Indoor But Colder Air Outdoor

I have two AC Units. One for upstairs and one for downstairs. The upstairs one works just fine but not the downstairs. So, i did a test by turning both units on and went outside to compare the two ...
2
votes
1answer
143 views

When I set the thermostat to X degrees, is that the temperature at which air is pushed out through the vents?

My hunch is that most ac units aren't that sophisticated, and they just pump air that is "cold enough" or "hot enough" and pump it until temperature rises to the specified value. Is that right?
5
votes
3answers
19k views

How can I stop my lights dimming when my Air Conditioning turns on?

I have no noticeable problems with my house's electricity, but when my Air Conditioner kicks in (and here in Central Texas, it kicks in year round) my lights dim for a second or so and then run ...
11
votes
4answers
2k views

Does building insulation wear out and have to be replaced?

First, a little back-story. I've been having trouble with the air-conditioning system in my south-Texas apartment home for almost two months so far this summer. The apartment manager has been ...
3
votes
1answer
293 views

Is it possible to override building-wide air-conditioning settings?

I live in an apartment building (high rise). The ac is off and they won't turn it on for another month!! Meanwhile it is 90f inside and I can't sleep!! Is it possible to overide? We do have a unit in ...
3
votes
1answer
316 views

What is the life expectancy of an air conditioning unit with a booster?

Over the weekend my wife and I lost our air conditioning. I called a technician out to the house and he replaced both the fan motor and the capacitor. He also had to install a booster to help get my ...
8
votes
4answers
357 views

Is air conditioner installation a DIY project?

We got a bargain on a brand new 6.2kw Split System Inverter Air Conditioner. The quotes we've received for installation are almost as much as the unit cost itself. Is this something I should be ...
3
votes
1answer
758 views

How do I replace an A/C diffuser attached to flex duct?

Our house has central air, with the air distributed via flex ducts around the house. On the second floor, the diffusers have baffles behind them that can be closed when the system is not in use, but ...
3
votes
1answer
151 views

How can I determine which MERV filters would be best for my air handler?

I have a Carrier 3.5 ton, 1/2HP air handler (Model Number:fc4bnf042). I have been using MERV 13 a/c filters for a few years now because my son has allergies. I recently discovered that the higher ...
1
vote
2answers
1k views

What should be cleaned or examined after an air conditioner drain pipe leak?

The other day, we found some water on the floor in our utility room. After some research and investigation, we discovered that the drain pipe from the central air unit was blocked. We were able to use ...
1
vote
1answer
1k views

What can I use to repair a crack in a plastic AC Condenser Drip pan?

I've currently got an oldish furnace (early '90s Lennox), with an A/C system. The blower motor burnt up on me last week, and I just had it replaced. It turns out that the reason for the motor going, ...
1
vote
0answers
239 views

Why does power loss leave my split/ductless AC unit inoperable for hours or days? [closed]

I've got an LG Ductless 12000 BTU unit that does the most annoying thing.. It is wired into a semi-standard (one of the prongs is sideways) 15A or 20A (can't recall) GFCI outlet inside - and if the ...
3
votes
2answers
1k views

Besides insulation and air conditioning unit, what else is there to check if my A/C isn't keeping me cool?

I live in an apartment home where the indoor temperature has risen to above 80 degrees Fahrenheit daily for the past two months. The outdoor temperature regularly reaches 100 degrees and the weather ...
2
votes
2answers
536 views

What is a safe maximum temperature for an unused part of the house?

We barely use our upstairs so I don't really care how hot it gets. Except, I don't want to cause damage to the house. Considering Texas summers are easily in the 110s °F nowadays, how high can I ...
11
votes
5answers
7k views

How can I calculate how large an airconditioner my house needs?

I know there are a lot of possible factors that go into determining the size of the air-conditioning system a house needs. Is there a standard way of calculating what is needed, or do A/C companies ...
5
votes
3answers
5k views

AC Coolant pipe has condensation and leaks inside wall

I've got an old AC unit (probably 13+ years old) that came with the house that I bought. This summer I noticed some water damage on the drywall in the basement, so I cut the damaged drywall away, and ...
1
vote
0answers
321 views

Where to buy plastic (temporary) air ducting in the UK?

Does anyone know somewhere (ideally online) I can buy plastic air ducting? The stuff I'm talking about is what they used on Mythbusters to make that helium 'airship'. It's just a large diameter tube ...
2
votes
1answer
4k views

Why is there water dripping from my ceiling AC vents?

I have a one story house with hot water heat. The house also has forced air AC ducts running from the attached garage, in the attic, down into the living room, bedrooms, and kitchen. At certain times ...
1
vote
1answer
522 views

What to do about a gas leak on my air conditioner?

I have an air conditioner that displays an error of gas leakage on the board. What should I do? Shall I turn it off? It is dangerous?
13
votes
3answers
18k views

Should I cover my air conditioner for winter?

Should I cover my air conditioner for winter? It's difficult to find an appropriate cover, but finding a cover for an evaporation cooler is easy (and because they allow for air flow from the outdoors, ...
2
votes
1answer
114 views

AC comes on randomly

Even though my thermostat was set to "Off" or "Heat", my air conditioner is coming on randomly and blowing cold air out of the vents. I figured that the thermostat was bad so I disconnected all of ...
2
votes
1answer
3k views

Air deflectors on floor registers and cooling efficiency

I was once told by an HVAC technician to avoid using air deflectors on floor registers during the summer. The reason was that the last thing you want to do is to direct the heavier, colder air ...
3
votes
1answer
209 views

Improve AC flow to secondary ducts

I have an AC which has 3 ducts coming out of it. Only one duct gets flow - I'm guessing the AC fan blows right into it. What can I do to improve the flow?
4
votes
1answer
595 views

A/C escaping down the staircase

I live on the second floor of a century-old house that doesn't have central air. We have a large window A/C unit in the main hall but our front door is at the bottom of the stairs rather than the top. ...
4
votes
1answer
2k views

AC in the attic affects downstairs but not upstairs

We have one AC unit (roughly 1 year old) connected to two zones: Zone 1 is upstairs and Zone 2 is downstairs. Yesterday, our AC seemed to completely stop working for the upstairs but continue to work ...
1
vote
2answers
5k views

How do I replace a condenser fan motor in a central air unit?

The condenser fan motor on my central air unit has seized up (tried like crazy to turn it it, but no go). I'm not sure how old the motor is but I'm guessing it's original, so about 12 years old. I ...
1
vote
1answer
450 views

Furnace Airflow

I have central air. When the furnace comes on, we can feel air coming out of the registers for a few minutes, then the airflow stops. If we turn it off for a few hours, we can turn it on again and get ...
3
votes
3answers
4k views

Why won't my AC system turn off after I flipped the breaker?

We've got a central cooling air conditioner that was installed in 1984 with a thermostat from that same year. We are replacing the thermostat with a new programmable one (which has a 100% ...