Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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1answer
49 views

Why does my thermostat show code 'PF' after running the fan or A/C?

After running either just the central HVAC fan, or the central HVAC AC for just a few minutes, the Bryant thermostat (Model TSTATBBPB101, C Wire attached) screen momentarily shows "PF", and then goes ...
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1answer
30 views

How to fill large window gap for temporary air conditioner?

I have an air conditioner that looks similar to this... ...except mine doesn't have the flaps on the sides, leaving a large open gap between the air conditioner and the window frame. What's the best ...
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1answer
34 views

How long should I wait before turning on a window AC after moving it?

So my downstairs AC went, of course during this insane heat wave. Checked out Lowes and found a small room AC for 150$ so came up with a plan. My room AC is rated for a much bigger space so I bought ...
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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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0answers
29 views

AC set at 73, but temperture goes down to 59

I set the temperature at 73 on the AC, but it keeps getting colder; it went down to 59 overnight. Thank you!
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2answers
31 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 ...
3
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2answers
21 views

Thermostat settings two hvac units older house

So I purchased a historic house built in 1920. The house has two HVAC units, one for the upper floor, one for the lower. Total sq ft 3300. I had been setting the upstairs thermostat at about 83 ...
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0answers
10 views

How to apply drain cleaner to A/C drain

A while back I asked a question in a thread (The top A/C drain in my attic is leaking. Why?), and I wanted to know how to apply drain cleaner to the bottom drain on my A/C system. Could someone answer ...
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1answer
50 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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1answer
36 views

External Air Conditioner Condenser Capacitor replacement

I have a couple of questions about testing and replacing the capacitor on my home heat pump external condenser unit. 1. How can I reliably test the capacitor (what tools do I need?) 2. What safety ...
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1answer
45 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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1answer
171 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 ...
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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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1answer
25 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
31 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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5answers
98k views

What are the recommended settings for a dual-zone air conditioning unit?

What are the recommended settings for an air conditioning unit that is dual-zone? Meaning, if I have a house that is two stories I know that in Florida they recommend you keep it at 78 F in the summer ...
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3answers
52 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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3answers
17k views

All outlets on one 15-amp circuit, need AC unit

The central AC in our apartment is not working effectively in the summer; we are running the AC continuously for 14 hours a day to keep the temperature below 80 degrees. As you can imagine, our ...
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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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3answers
143 views

Is there a significant risk of CO2 buildup with a ductless heat pump A/C?

It just occurred to me that if I install a ductless heat pump to cool the air in my house's bedrooms in the summer, the unit will be cooling and dehumidifying the air - but not introducing any new ...
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0answers
49 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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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 ...
4
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3answers
146 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
52 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
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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4answers
1k 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. ...
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0answers
74 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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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 ...
7
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2answers
9k views

How do I install a jump duct?

Our master bedroom is considerably warmer than the living/dining/kitchen area of our house, and we've been setting the thermostat quite lower than we'd like in order for the bedroom to get cool enough ...
2
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1answer
57 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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0answers
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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1answer
500 views

My Air conditioner suddenly became defective after a power outage

So, these are the symptoms: 1] The big fan outside is taking a lot longer to start. 2] Within 2 minutes of start-up and cooling, it makes a growling/ rattling sound and 3] The power switch to start ...
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2answers
586 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 ...
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0answers
32 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 ...
3
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2answers
268 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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2answers
3k views

Can I convert a window A/C unit in to a pool-water cooled system?

I have an 18,000 BTU A/C unit that blew a compressor last year. Perfect for a small project. I however could not find a professional to help me out, so maybe it's DIYable. I know just about enough ...
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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 ...
5
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2answers
17k 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
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1answer
63 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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1answer
40 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 ...
1
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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. ...
0
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1answer
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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0answers
46 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 ...
1
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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 ...
0
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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 ...
0
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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 ...
0
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2answers
55 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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0answers
28 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 ...