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Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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2
votes
3answers
88 views

Can I upsize my air conditioner if I have a two-speed compressor?

The upper floor of my house has a split A/C, three-ton. When the temperature gets up above about 95 Fahrenheit, the unit can't keep the upstairs cool. That means that for a few weeks a year, my kids'...
0
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0answers
52 views

Heating System Premature CutOff / DIY Options?

I've collected all of the facts about my system and the problem we are seeing. We have two external air pump units outside the house and a Rheem furnace (GH36S, 36000 BTU) that appears to be working. ...
1
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1answer
80 views

Does insulating an Air Conditioner from inside (for winter) increase chance of damage?

I have two window air conditioners that I'd like to seal during winter (Friedrichs). I'm considering sealing them from inside (with blankets or foam) as they let in a lot of cold air and noise. ...
0
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1answer
53 views

Air conditioner not blowing air

I have a LG air conditioner that i can find it online, not sure why. when i turn it on, there is no air blowing. not sure if it helps but the model number is hs-0964f73. not sure why but i cant seem ...
1
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1answer
83 views

Can i install condenser unit of split air conditioner in a rotated position?

I have to install a 1.5 ton split AC in my home. Due to some space constraints I can't install the condenser unit (the external unit) as instructed. Can I install it by rotating it by 90 degrees. I ...
2
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2answers
52 views

Curtains for a non-air-conditioned apartment in the tropics

We live in Mumbai - West coast of India, tropics. Summers are from March to July with temperatures reaching early 40 degree Celsius and a lot of humidity. It rains from July to September with ...
1
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3answers
5k views

Is it bad to close furnace dampers in order to balance temperatures seasonally?

I have a two story home. As such, it's always hotter on the second floor than the first floor. As advised by many articles and how-to videos out there, I usually close the dampers in the ducts ...
2
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3answers
273 views

Is it better to have two A/C compressors running or just one?

I'm about to get the A/C installed in my new apartment, and was wondering which of the following two situations would be more efficient: (a) Cooling 2 rooms on a single A/C compressor (same system) ...
1
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1answer
51 views

Placement of evaporator unit on top of furnace (residential)

I am installing an updraft 3 ton system with the evaporator on top of the furnace. They fit nicely, but I'm not sure which front-or-back orientation the top unit should be in. In the attached ...
2
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3answers
129 views

Do I need to switch off A/C external breaker for winter?

My home’s A/C has an external circuit breaker. Do I need to switch it off for the winter?
2
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1answer
255 views

Why is my air conditioner running when the house is below the set temperature?

We recently had a whole new system installed for HVAC. We had a lennox furnace with dehumidifier and UV thing, along with the exterior lennox condenser for A/C. We have the iComfort S30 thermostat, ...
0
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1answer
131 views

Blue cable in 220v air conditioner plug & cord?

I'm looking to replace the plug on a window air conditioner unit that uses a 6-20 240v plug. However, in addition to the cord having two hots and ground, there's a small blue cable that I'm not sure ...
0
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1answer
141 views

Is hydro air more efficient than gas/oil?

I have heard different things about hydro air systems. I am considering getting one because it is a 5000 SF house and a 1500+ SF addition is planned and I heard that it is easier to expand a hydro ...
0
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1answer
90 views

Large loft area cooling

I believe the dimensions of the room are about 36' x 12'. It is the upstairs room, and has a loft looking out to the front room. In the summer it is almost impossible to cool down, the air vents ...
0
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0answers
65 views

AC internal unit blow fan - cleaning mold

My internal unit has mold building up on the blower (see schematic below). I'm not sure if it's mold or if it's dust, but I'm pretty sure it needs to be cleaned. The only easy way to reach it is ...
0
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1answer
38 views

AC \ Heatpump radiator corrosion

The example, from another posting, shows radiator corrosion. My heat pump's radiator is so corroded that it is unable to radiate heat and now the heat pump must be replaced. What preventative ...
0
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0answers
31 views

Is my floor unit AC actually dead?

I recently bought a floor-unit AC (the kind that sits on the floor and has a hose that goes out the window). It worked for one night really well! The air coming out was cold and the hose felt hot to ...
0
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1answer
58 views

What could be going on with my HVAC?

I have a Carrier Infinity system - full system (heating and air conditioning) newly installed a little over a year ago (southern Ontario, Canada). I have programmed the system for continuous fan ...
0
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1answer
47 views

AC Condensate not draining from newish HVAC

A few years ago I replaced my entire HVAC system with one similar size to my old one. I used a local contractor that I've had a long relationship with, who I've continued a maintenance contract with. ...
0
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1answer
102 views

Adding New Breaker / Subpanel

I am installing a 240v ductless mini split. My breaker box is full, and I have a seperate ( hot water ) breaker in its own box on its own meter. I see two ways I can approach the situation: 1) Add a ...
3
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2answers
1k views

Need to stop sound of rain hitting top of window AC

I want to silence the sound of rain drops falling on my window air conditioners by putting some kind of pad on top of them. (The sound is keeping me awake.) I also need to be very frugal right now so ...
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3answers
143 views

How bad is it for my A/C unit if I cut the power while it's working?

I have a rental apartment with two a/c units. I installed magnetic contacts on the windows of each room and a small module (a sonoff basic flashed with tasmota firmware) that shuts off the a/c relay (...
0
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1answer
152 views

Protect mini-split condenser from ocean corrosion?

I recently bought an A/C inverter and put the condenser on the roof. I live next to the ocean so if I don't do something to protect it, something in the blower will start rusting very soon. What can ...
21
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4answers
5k views

How to get rid of CO₂ in a house with A/C in hot summer?

Recently, I've been measuring the CO₂ concentration during multiple nights and the levels in the bedroom where I sleep are very high and unhealthy (over 1600 ppm). I use an AirVisual monitor, which ...
2
votes
1answer
287 views

AC Blower Motor not working during night

The blower motor in the furnace stops working at night most of the time when the AC should be on. The blower motor (in the furnace) might run for one or two cycles at the beginning of the night but ...
0
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0answers
236 views

How can I tell if my furnace common wire is “properly grounded”?

I've been experiencing occasional short cycling of my A/C compressor (turns on/off quickly several times in a row) and Nest senior support is speculating that my common wire may not be properly ...
0
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2answers
850 views

Is it ok to place a window AC unit in front of the window instead of hanging outside?

I just put a window AC unit on a table in front of a window instead of hanging out of the window. The back is flush with where the screen would be so the heat is pumping outside.. but the side vents ...
1
vote
1answer
157 views

Fusible plug blew on mini-split A/C, how to fix?

I have a 2005 Mitsubishi mini-split that has been working OK but blew the fusible plug (on the low side just before compressor) this winter while it was in heating mode. Now I'm wondering what to do. ...
1
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4answers
912 views

Mini Split Condenser in Garage? With ventilation?

I live in a fairly warm and dry environment and due to HOA restrictions am unable to place a window A/C unit, outdoor unit, or a system on the roof. I understand that A/C shouldn't go in attics due to ...
2
votes
2answers
45 views

Air Conditioner frosting at the bottom

I have a window air conditioner (about 7-10 years old) it uses the cut to size foam filters. Today, I was going to remove the filter for cleaning and found what seems to be frost across the bottom ...
0
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1answer
47 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 ...
1
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3answers
228 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 ...
0
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1answer
416 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 ...
0
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2answers
44 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 ...
15
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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 ...
0
votes
1answer
179 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?
0
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0answers
134 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 ...
0
votes
1answer
44 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 ...
0
votes
1answer
51 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 ...
0
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0answers
54 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 ...
0
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1answer
30 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 ...
0
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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 ...
2
votes
4answers
2k 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. ...
0
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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 ...
0
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1answer
57 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 ...
3
votes
3answers
113 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 ...
0
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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 ...
0
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1answer
341 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 ...
0
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1answer
586 views

Using automotive R134A in my refrigerator?

Can I use automotive R134A in my refrigerator without damaging anything?
2
votes
2answers
120 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 ...