Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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83 views

Best air conditioner for cold blasts?

The old air conditioners I had could blow out snow literally that is how cold they got, now air conditions are only moderately cold. What would be the best system to get to just blast one giant vent ...
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55 views

How do I solve the allergic reaction (red burning eyes) from the mitsubishi unit in my bedroom?

I have a twelve year old Mitsubishi unit in my bedroom. I also have allergic reactions to pollen, mold, etc. This year, for the first time, I wake up in the morning with red, burning eyes. My ...
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43 views

My AC blows warm air

I am renting, and my previous AC unit sounded like a diesel generator so the maintenance team replaced it with a new one. It is the Garrison Air Conditioner, Through the Wall, 14,000 BTU, 230/208 ...
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22 views

Lennox Furnace Blower not working on AC In On or Auto

Please Help! I have a Lennox Furnace Model G60uhv(X) after years of working fine I switched the thermostat to AC and it failed to start the cooling cycle. I suspect some sort of problem with the ...
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1answer
53 views

Line to AC dripping at the furnace

My line from my exterior AC unit is dripping at the furnace. The dripping over time has caused rusting and we've had to replace the control board under it. It appears the root cause of the problem ...
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1answer
47 views

Can a roof A/C be installed on a concrete slab on the floor without being on a mounting?

An A/C company came out and replaced my A/C with a new unit a few years ago. I've had A LOT of problems with it freezing since then. I noticed a lot of mold on the bottom of the unit itself and it ...
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34 views

Thermostat wiring for ac

I recently installed a nest thermostat for our AC system. Unfortunately I was short sighted and just assumed all the wires were the color I needed. Since installing the thermostat our system won’t ...
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2answers
87 views

Can I vent a portable air conditioner unit through a heat vent?

I have an old house and don't have a window to open for the portable AC to vent to. Can I vent it out through a heat vent (my home has modern ventilation)?
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42 views

AC side curtains don't fit into the window frame. Am I missing something?

As shown in the picture, the part of my window the side flange at the end of the side curtains is supposed to slip behind is entirely too thick to fit snugly while screwed into the pane above it. Am I ...
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2answers
56 views

How to clean a reusable HVAC filter

My HVAC system is around 15 years old and I have a washable air filter. The tech who looked at it last told me to clean the filter out and run water through it once a month. He told me to let the ...
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1answer
28 views

AC Unit Not Cutting On

My AC unit has the thermostat indoors, a unit in the crawl space and the outdoor unit. Everything was working until I had a contractor come out and add insulation in my crawl space. Now the heat/air ...
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1answer
36 views

Lennox air conditioner capacitor and compressor ohm readings

I have a Lennox 2.5 ton a/c unit, model 13ACD-036-230-05, with a blown dual run capacitor (the run terminal for the compressor is burnt off the can, the fan and common terminals are still intact, fan ...
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3answers
129 views

Will running AC on low fan speed cool room faster?

As I understand, the basic function of an indoor air conditioning system is to pass air through cooled surface (tubes) which makes air cooler and hence it reduces room temperature. So my question is, ...
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28 views

Condensation/moisture on AC Unit

Is there any particular reason why there is so much moisture/condensation coming from this AC unit? Added context: it rained the entire day before this photo was taken, but the unit is located ...
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2answers
50 views

Considering portable a/c vs our old Central Air, from 1992, in 2 story, 2300 square foot house, High Desert

I'm in the high desert of Southern California. We're in a 2300 sq foot home, 2 stories with 3 bedrooms and 1 master bedroom on second story. The house is cooled by 2 central air systems, manufactured ...
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2answers
141 views

Unthreaded holes for AC fan motor mounting screws?

My AC is not working. It is a Trane AC (Model 2TTB0030A1000AA). In the process of diagnosis I tried replacing the capacitor, and that did not help. I tested the fan blades and they no longer spin ...
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2answers
43 views

How to clean a domestic air conditioner

How do I clean the inside of a domestic air conditioner? Can I spray water to the coil (after the filters are off) or water will make coil to get rust?
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71 views

My 2.5 ton HVAC unit

We put in a new 2.5 ton Trane HVAC unit, and when it hits 90 outside, it won’t hold 74 degrees inside. (1400-1500 sq. Ft). Will it help to put in a 3 ton unit, or will it do more harm than good?
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50 views

HVAC blower fan won't stop

FINAL UPDATE: I have found the culprit - the Nest thermostat itself. First, I disconnected the t'stat at the control panel and found out that the fan would no longer start upon powering the system. ...
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1answer
80 views

Need to identify wires coming from external AC Unit

idiot DIY'er here :P. I recently installed a smart thermostat and long story short; I removed the two wires from my furnace's board for the external air conditioning unit in the process. I was going ...
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71 views

How to use an air conditioner port to bring in fresh air from the outside?

My condo building has AC ports (essentially a round hole that goes outside) in every unit, to which you can connect an air conditioner. However my unit doesn't get too warm so I want to use the AC ...
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1answer
254 views

Why portable split air conditioners not common? What's the catch?

Allegedly, you could put the outdoor unit on your balcony, the indoor unit on the floor inside and -- without any problematic install you have a much better (or one would think so at least!) than your ...
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1answer
106 views

What does “Temporary Hold” mean on a BG&E thermostat

We live in Baltimore, MD. As we enter Spring, today is the first day it was warm (over 80°) and humid (flash flood around 4:00 PM). We tried to run the AC for a while but the air was not cool. It was ...
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57 views

Will noise be an issue when joining two rooms with a circulating fan?

The plan is to join two adjacent rooms with an exhaust fan. One has air conditioner, the other does not. A handyman will drill a square hole into the wall, and then attach the fan. The goal is to cool ...
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1answer
479 views

Replacing a 110 Air Conditioner plug

I need to replace this plug on my 110 AC unit. (Cord is in good condition) Lowe's has a similar plug but with only three wire connections ( I would like to use this stock plug as an OEM replacement ...
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61 views

Fujitsu Halcyon: Custom Air-Filter (C.F.M.)

I'm trying to make airfilters to fit over my Fujitsu Halcyon Wall Mounted heating & air-conditioning split system. I'm talking about the indoor unit specifically. The wire mesh screens that come ...
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1answer
38 views

Air Conditioner: Panel Malfunction

I have an old window A/C unit which the electronic panel is malfunctioning. Basically, it keeps changing randomly the settings (watch the video). Examples: If I set the fan to low, after a while it ...
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2answers
83 views

HVAC fan on compressor not coming on

I noticed today that the button on the thermostat isn't turning the fan on by itself. I tried today just to turn on the fan couldn't get it turn on. Tonight we turn on the AC couldn't get cold air. ...
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1answer
64 views

Tungsten wattage vs resistive wattage for Smart WiFi outlets?

What is the difference between both of them? There was a post similar to my question, but there was no answer about resistive wattage. I want to buy a wifi outlet and I need to make sure it doesn't ...
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1answer
36 views

Hook up new thermostat

Top brown picture is my old thermostat white is the new one , do I have it wired correct? On out side unit we have replaced motor, fuses, compassator ,cc contactor ,relay . We have a heat pump. But ...
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1answer
33 views

How should I size an air conditioner for a room in the attic?

My bedroom is upstairs in the attic and much of the interior walls/ceiling are the underside of the roof. I believe there is a couple inches of hard foam between the drywall and the sheathing/roofing....
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377 views

My air conditioner sparks, but only sometimes, even with a new cable

I am not sure if this question fits here. But it's important and it's about troubleshooting and electric problem. So I will try... My air conditioner shows from time to time electric sparks for the ...
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22 views

No furnace fan in cooling mode while hooked to a fresh air damper controller

I added a fresh air damper and control, ( Soler Palau MD6-ES24VK) to my furnace (2006 York GY9S). The damper worked great in the winter but now that I am doing some cooling, I noticed that the outside ...
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60 views

Controlling one FCU with two thermostats

I have a chilled water fan coil unit that will feed two areas, living and the bedroom. I want to control the FCU with two thermostats, one in the living and one in the bedroom, (preferably) in a ...
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3answers
107 views

Can an air conditioner rated for 50Hz be used on a grid at 60Hz?

My air conditioning unit from Qatar is for 50hertz and I want to move in the Philippines. Can 60hertz power be used?
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16 views

Air conditioner external fan not starting well

The A/C external units (both fan and compressor) do not start sometimes. When I turn on A/C for cold air, then the only main unit starts and blows warm air. The only way that works is that I turn off ...
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48 views

Circuit board fuse for the air handler

where in the furnace does it say if it uses a 3 amp or 5 amp fuse for the circuit board? Or how would I know which is correct
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2answers
52 views

Upstairs room too hot - can I install a room-to-room fan to blow hot air back into the high-ceiling living room? [closed]

I'm in a narrow, vertical, townhouse style three story house. My upstairs bedroom gets too hot, and downstairs gets too cold. I found I could fix the downstairs problem by running the HVAC fan full ...
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1answer
42 views

Temperature stabilizer problem

In my 1 room + bathroom apartment in Germany, these mechanisms (searching Google by them didn't name them) exist: in bathroom, and in the room, there is this: When I am taking a (long?) shower, ...
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1answer
36 views

Intelligently Controlling 5 PTAC Units

I recently purchased a new apartment which comes with GE zoneline PTAC units that control both heating and air conditioning electrically. There are a total of 5 in my apartment, 1 for each bedroom and ...
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1answer
76 views

Help, 120 vs 220/240

Want to install a ductless a/c in my concrete condo. It is 220 volt only draws max 1300 Watts I have a 15 amp 120 v outdoor outlet available. I know it’s not optimal, but is it doable to convert to 15 ...
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6answers
4k views

Does A/C encourage mold growth

I think i'm being sold bunk by a mold company, but not sure. We live in the tropics, we recently had our bathroom ceiling flood due to a burst pipe, and went away immediately after. (the landlord had ...
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1answer
67 views

Solar panel as a hatch and Is sleeping under a solar panel safe?

I'm looking to build a very large custom roof hatch/vent on my van. I was going to make to top out of Lexan, but then I realized I might want a large solar panel on the roof as well. I was looking at ...
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3answers
82 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'...
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50 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. ...
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1answer
76 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. ...
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1answer
42 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 ...
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1answer
65 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 ...
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2answers
51 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 ...
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3answers
4k 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 ...