Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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31 views

Is it more efficient to turn my AC unit off periodically vs. keeping it on only while in the room?

I have an AC unit in my bedroom + workspace. I use its "auto" fan speed and "energy saver" mode (rather than "cool" or "fan only"). I'm wondering, which strategy is more energy efficient and by ...
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23 views

HVAC Air Blowback

Furnace/Blower: Rheem R92PA0851521MSA Dual Zone System (Honeywell TrueZONE HZ311) - Honeywell M847D1004 Actuators Age of system: less than 2 years old including ductwork Ive noticed that if Zone 1 ...
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1answer
28 views

Could my furnace be leaking due to condensation neutralizer?

I posted this and the main suspect was condensation pump but after troubleshooting, the pump is working fine (tested standalone). Now I wonder if the leak could be due to the condensation neutralizer; ...
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3answers
51 views

My outside a/c unit will not kick on

Earlier today the a/c unit tripped the breaker. I reset the breaker but the outside unit will not kick on. Please advise.
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44 views

Air conditioner unit wires

I was trying to weather proof yesterday and my unit fell out of the window. I grabbed the cord and yanked out some of the wiring on accident. Can someone help me figure out how to reattach?
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41 views

Can I add return air vents to improve air conditioning in some rooms?

The return air system in my 46 yo home utilizes the stud space not a duct system. My bedroom has a vent and maintains a temp about 5 to 10 degrees lower than the other bedrooms. My question: Can I ...
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72 views

The new AC doesn't cool the house down like old unit, what can be the problem?

I had to replace my old HVAC because it was old and had a freon leak. The new unit doesn't cool down the house like the old system. The ac runs all day and it takes hours to get down to 72 degrees and ...
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1answer
54 views

NEMA 6-15 to NEMA 6-20 A/C unit

My energy provider sent me a WiFi A/C system to hook up to my window unit, however, I cannot plug it into my wall because I appear to have a NEMA 6-15 outlet that matches the plug on my A/C unit and ...
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22 views

domestic air condition needs restart for cool air

I have a new domestic air condition 9000btu in my room. I have the settings cool and 23 degree temperature and I noticed that when I turned it on for the first time of the day, it doesn't blow cool ...
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3answers
161 views

How can I keep my computers cool in a 100 degree house?

I live in a tiny house of sorts and my AC doesn't run while I'm not there. I have two desktop servers that I use for my work which are currently stored elsewhere, but I'd really like to move them to ...
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31 views

Furnace blower cutting in and out during A/C use

Backstory: I fired up my air condition for the first time this season (single family house) and felt lukewarm air coming out of my ducts. When i went outside i saw that the condenser was not turning ...
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1answer
31 views

Running AC/Heater when washing a cleanable filter

I have a heat pump/AC system with a washable air filter. I was told to clean the filter out and run water through it once a month. He told me to let the filter dry for 3 hours before replacing it. I ...
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2answers
260 views

Can combing bent evaporator coil fins damage it?

I have recently purchased a new AC. I opened it to clean air filters and found that an entire row of fins were bent. I asked the manufacturer about this and they said that it won't affect the ...
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145 views

Is there such a thing as a DIY heat pump or mini split

I wanted to ask this question to the community. Is there a legal way to install a mini split or heat pump without having an EPA license? I have seen similar questions asked several times or ...
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1answer
37 views

The top A/C drain in my attic is leaking. Why?

My dad told me that the top A/C drain (we have bottom and top A/C drains) was leaking, and he wanted me to find out why it is happening. Our A/C system is from Ruud. So what is causing the the top ...
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61 views

Choosing air-conditioner's BTU power for humidity

Recently, I've been cut off of access to sun and fresh air to my apartment. It is completely sealed now, with no windows or sun to the walls or roof. Ever since, humidity has grown a lot, and mold is ...
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45 views

Does cabling between a mini-split indoor and outdoor unit need conduit?

I am installing a mini-split AC system where there are multiple indoor units connected to a single outdoor unit. For each indoor unit, there is a separate 4-conductor cable that connects to the ...
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1answer
38 views

AC Condensate Line Location - Outside vs Inside

I'm installing a few mini-split AC units in my house, and I'm trying to determine the best place to run the condensate line. Right now it's either between running it outside with the line set and tray ...
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1answer
26 views

Air-conditioner in heat mode

When a split unit air-conditioner is used in heat mode, does it dry out the air inside the house/room? If so, is it advisable to use a Humidifier in conjunction with the air conditioner in winter ...
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2answers
53 views

Why would my HVAC blower motor stop working after 10 minutes of runtime

my 2 year old unit it freezing after it’s been running about 10 minutes. I turned the unit off all last night. This morning I took a look at it outside, then went back in, turned it on, sat by the ...
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1answer
26 views

Can the wire from the y terminal on thermostat be connected to the c terminal on heater board as pictures show?

My nest was installed with no c wire and it lost power. At this point the tech looked at the wiring diagram in a/c unit outside but I do not know what he did. A/c worked but later nest had no power. I ...
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1answer
49 views

Info concerning an old AC unit

I have a Panasonic cu-g125ke AC unit which trips the circuit breaker 30 seconds after its's powered on. I have searched the manuals for what to do but it says: contact a dealer in your area. The ...
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27 views

split system air conditioner condensate hose

I need to buy and install a split AC and I have a small issue. The AC has two copper pipes for refrigerant gas to flow through and one hose to eliminate condensation water, and normally, the hose ...
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1answer
45 views

Maximum weight window air condition without supports?

For the average old window what is the maximum weight air condition you should have installed without any support brackets beside screwing in the window frame from the inside? For example up to 50 ...
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39 views

air handler not turning on

Assume an ac compressor doesn't work. Will the air handler still come on if the thermostat is set to fan "on"? Does this differ system to system? I am trying to troubleshoot a non-responsive ac ...
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2answers
98 views

How do I deaden the sound of water dripping on metal?

I live in a two story apartment complex (upstairs neighbors are REAL nice). My bedroom has an AC Box/Swamp Cooler mounted into the wall. Directly above it is a similar unit for my neighbors. The ...
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1answer
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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1answer
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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1answer
42 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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16 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
51 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
45 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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0answers
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
51 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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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
32 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
81 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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1answer
25 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
49 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
76 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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38 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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1answer
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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44 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
45 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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68 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
209 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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71 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 ...