Questions tagged [air-conditioning]
For general questions regarding cooling your home.
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Why is my neighbor's A/C causing my walls to sweat?
Whenever my neighbor runs their air conditioner for an extended period, my room, which shares a concrete wall with theirs, experiences condensation issues (my wall starts to 'sweat'). After ...
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Place heat pump unit on concrete walkway or dirt/gravel?
The picture shows the location for a new heat pump. And as part of an upcoming hardscaping project, we will pour concrete in all this area to build a walkway:
We would like the HP to be installed ...
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First finishing project: Attic or Basement for office/studio? [closed]
First time homeowner here, 100 year-old brick bungalo in Chicago where we have very cold Winters and hot Summers. I have my choice of an unfinished basement or unfinished attic to build my home office/...
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A/C vent not connected to duct?
So I am in the process of doing a light reno to a bathroom in my 1954 ranch style home and I took off the a/c vent to wash it and/or buy a new one. To my surprise (okay not really surprise— there was ...
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How to run a 220v mini split on 110v wired home
I have an off grid apt in Baja California Mexico. The apt is wired for 110v. I would like to integrate an ac200max solar generator as well as a 550w dual dual generator.
How can I integrate all of ...
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Is it okay to have an air handler in an uninsulated attic or will the air handler have to work harder?
We live in CT -- so cold winters. I don't know all the right/technical terms, but this is our situation:
Split level ranch (two floors plus attic)
Gas furnace and gas water heater in the basement
Air ...
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Does the BTU change on different fan speeds? [duplicate]
I can only find a 14,000 btu window a/c for my small room. I really only need an 8,000 or 10,000 btu but can’t get one in my area. I was just wondering if I kept a/c on lowest speed, would the btu ...
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How to Airseal and Insulate Texas Homes
I am interested in what I can do to help improve the energy efficiency of older Texas homes.
I am looking to purchase one in the new year but it is my understanding that in 2012 the energy efficiency ...
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Air conditioner outside unit / condenser does not come on when thermostat calls intermittently / usually works after switching break/pulling fuse
A few times over the past two weeks, my central AC unit would stop producing cool air. The inside fan (furnace blower?) would be working, but since the fan on the outside condenser was not running it ...
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Installing a microwave oven and an AC unit with very tight current capacity
Recently, I moved in a 1 bedroom apartment unit with no already installed AC unit and microwave oven. Thus, I am thinking of installing them by myself, but I noticed a problem. The capicity of my ...
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Sizing charts for air conditioner or heat pump for humidity rather than cooling? 1-stage vs. 2-stage? 3-stage? [closed]
Inevitably I'll have to replace my heat pump, and when that time comes I'd like to have the calculations on the size of the replacement to account for dehumidifying in addition to heating and cooling. ...
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Blue liquid dripping from mini-split
I've recently noticed a blue streak running down on the wall under my mini-split indoor unit. I cleaned it but it came back after a couple of weeks. So I disassembled the unit and found from where it ...
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Why is my AC unit making a loud buzzing noise?
This only happens maybe 1 out of 10 times the AC runs, maybe less, but the buzzing sound is aggressive enough that the neighboring wall on our home vibrates like the hood of an old truck.
On the off ...
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Rattling Supply Vent
I have a 4-ton HVAC system with 2 zones, with two separate thermostats for upstairs and downstairs (~1200sqft each floor). When only one zone is active (e.g upstairs) but the HVAC system is at full ...
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Ac unit will not come on
Someone instaled a 240v window ac unit line. They connected the white wire to the ground bar in the panel. The ac unit worked for a little while and turned off. Now the ac unit will not come back on. ...
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Can I reconfigure two 5" ducts into a single line & what size should they be?
I am trying to move a floor register location. Currently I have two 5" HVAC ducts being fed from a 6" x 10" rectangular trunk. The one 5" run has the register in the middle of ...
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Minisplit Install With Thin-Walled Lineset
I'm currently installing a multi-zone minisplit in my home. Unfortunately, I bought the cheapest linesets I could find. The 1/4" line has thinner walls and is very difficult to flare and torque ...
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How to vent portable air conditioner in non-AC friendly condo
I live in Seattle in a 800sqft condo without central AC. I have a balcony with an outward swing door, tilt and turn windows, a fire place, and a dryer vent.
I'm not allowed to use a window AC unit, so ...
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HVAC question about Evaporator Coil repair
My evaporator coil was recently replaced (Carrier CNPHP6024ALAAAAA replaced with a bigger unit, CVPMA6124XMC). They sealed around the edges with tape. The original install was sealed with some kind of ...
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Insulating an open window with air conditioning pipe through it
I seek to install an on-floor AC and pipe its exhaust through a window (images below). The window is double, lower window being taller, and is elevated way above the origin exhaust pipe.
I'm thinking ...
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AC Evaporator coil died and replaced with a bigger unit
I hope I can ask this question here. I think my repair dude just pulled one over on me and would like to get some help if possible.
My evaporator coil went out, Carrier model CNPHP6024ALAAAAA.
I ...
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Do on-wall air conditioners, mini splits, need expert installation or water replacements?
Picture below - says it heats and cools. For an AC like this,
Are regular "refills" needed, like changing water/cartridges?
Can I reasonably install it myself? I'm no DIY expert
(Optional) ...
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Venting a portable AC with a mesh window
We bought a portable AC. Unfortunately, our windows to the outside only open a certain amount and we don’t have the type of window shown in the video here where we can open it up and close (see ...
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Wiring thru the wall A/C
I need to wire a 20 amp, 240 volt, single yoke, double pole breaker for a thru the wall A/C. Also reknown as "115/240". Using 12g wire running 40 feet. I've seen this done using 12/2 and ...
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2nd floor zone is blowing cold air out the return. Nothing from the usual vents
I could not turn it off just by setting that zone to off. The fan appears to be running in reverse. The only way I was able to stop it was to set the master zone downstairs to off.
I am in my ...
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Finding an air conditioner refrigerant leak that's completely empty
I have a central air conditioner that worked briefly when recharged professionally, but the refrigerant all leaked out within about a month, so there's a pretty substantial leak somewhere. It's a &...
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Can anyone help me fix my AC unit
so we were having problems with a stripped wire that runs from the AC outside to the hvac inside so for a few days the ac did not work. We had someone come out and he ran a new wire but now the AC won'...
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High pitched whistling coming from AC lines
Does anyone know what would cause a high pitched whistling noise to come from my AC lines when the AC isn't running? It seems like maybe there's some refrigerant or air trapped in the refrigerant ...
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Couple of questions on the outside unit of a split heat and A/C installation
I have a Viessmann heat and A/C installation where a single large common outside unit located on the roof connects to split units on three separate floors.
First question:
There is a pair of copper ...
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Should water be dripping from my furnace condensate line onto the basement floor?
I recently had a Lennox A/C and furnace installed. The condensate line drips water into the basement floor drain, as my old one did. But now there's also a little side vent in the line that is also ...
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HVAC condenser fan overheating/shutting down turns out a bad control board
Two weeks ago my condenser fan started overheating after 15 to 30 minutes of runtime. Seeing as capacitors are cheap I replace the capacitor first. The problem persisted so I ordered a new fan motor. ...
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Changing from a White Rodgers thermostat with wire to RC to a Honeywell without RC
I changed from a White Rogers thermostat to Honeywell.
The white rogers has a red wire going to RC but Honeywell doesn't have a RC.
Where do I put it?
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Thermostat Does Not Control A/C or Heat
We have two thermostats in our house - one upstairs and one in the middle level. We are having issues with the thermostat in the middle level and have noticed the following:
We can turn on the fan ...
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AC Heatpump fails after cooling for few hours
I live in the lower Ohio area. I have a heatpump, Airtemp brand air conditioning system that's only 6 years old, on days that are in the mid to high 80s (or hotter) the system will run until about 2:...
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How to circulate hot air from the upstairs?
We have a heat pump in the bedroom, which is right next to the top stairs but the cool air doesn't circulate much outside the room. All the hot, humid air seems to 'sit' at the top of the steps so I ...
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"DIY" Mini Split needs a new HVAC disconnect box?
In central texas if that matters. I have a (not yet installed) Mr Cool 4 DIY Mini split. I'm finishing my garage, and that's going to be my AC in there. But it looks like this isn't so "DIY" ...
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Need Advice on Installing AC Unit in Antique Wooden Window Frame
I recently purchased a 12x20 outdoor shed where I plan to set up my remote office. The shed is fully insulated on the walls and ceiling but tends to get quite hot, so I've decided to install an air ...
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Why is my house getting warmer despite the A/C running?
Temperatures in my house have been climbing despite the A/C running.
My condenser unit is running, appears clean, and no brush is growing against it. The pipe into the ductwork above the heater is ...
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How to circulate cool air into bedrooms through narrow hallway?
I have recently installed a window air conditioner in the living room area of my apartment, which is the appropriate BTU for the whole apartment. It’s been working amazingly up to the doorway of the ...
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vent damper looking for lever
I have attached a image of a vent we have in the house. I like to know if this has a damper I can adjust? I don’t see anything where there is a lever to turn? Any help would be great.
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Why does my Fedders A/C run continuously with the energy savings feature turned on?
I have a Fedders A6Q08F2A. When I have the Energy Saver on, it will run continuously unless I turn the temperature up to 85 and then it starts cycling on and off. The temperature in the room is 75. ...
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How to stop air leaking from this part of HVAC?
Air is leaking out of the back of this Goodman HVAC unit. What would I need to reseal this part? It’s where the condensate drain line connects.
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Do I need to vacuum water out of my attic A/C drain pan?
Long story short, a/c repair guy fixed my a/c system in my attic today, it had shut off due to a moisture warning in the pan because of a clogged drain. Fixed the drain, installed a new moisture ...
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Insulating/AC efficiency improvements
We moved into this house late last year. It is a 1992 cape style brick house.
In short, our upstairs is miserable sitting in the mid 80s with the upstairs unit running from 11am-10pm.
After doing some ...
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How to keep house 40º cooler than outside?
I live in a desert environment where many summer days are over 120ºF. I would like to keep the inside below 80. My current AC cannot achieve this even if it runs all day long. I've read from ...
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Why do variable speed heat pumps need a proprietary (communicating) thermostat and why does mine not need one?
For DIY context: I recently got a heat pump installed; I know many things are not optimal (e.g. ductwork) and I am scoping what I want to fix/improve myself.
All offers I got for variable speed heat ...
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How can I troubleshoot a dehumidifier evaporator which frosts up quickly?
This dehumidifier is about two years old. The evaporator is icing up almost immediately after turning it on. This picture is about 20 seconds after turning it on. After about an hour the bottom ...
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Where's the c-wire on my air conditioner?
I'm trying to install a smart thermostat in my home. It has only an external air conditioner (model P3RD-042K, here's the manual/wiring diagrams), no heat. The current thermostat has an unused blue ...
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Indoor air conditioning unit makes whirring sound on startup
I have a cooling only air conditioning unit that makes a whirring sound for a few minutes and then the sound stops. It never made it before. The air conditioning unit is a Lennox brand from the 70s.
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Neighbor's AC Unit Causing Ceiling Fan Hum?
One day last month my downstairs neighbor's bedroom ceiling fan started to become very noticeable. It's not loud, but it keeps me up at night. I can tell when it's on just by walking past my bedroom ...
