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Questions tagged [central-air]

For questions regarding a central cooling system for your home. This is typically a split system with an outdoor compressor/condenser and an indoor evaporator and air handler. Air ducts are used to cool air throughout the home.

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40 views

Condenser fan quits on a Goodman heat/air unit

I have an older Goodman heat and air outside unit. I can run the heat on it for awhile, sometimes 30 minutes sometimes 40 minutes and sometimes longer, but then the condenser fan just stops but the ...
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0answers
13 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
29 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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1answer
59 views

How do you block cold air flow from an AC vent without blocking the vent?

From what I've read it seems that it's a bad idea to cover central air conditioning vents. So what can I do to control the cold air coming through one vent without lowering the AC for the rest of the ...
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2answers
35 views

Air Conditioner question

Is it typical for 1 of the (pipe) lines from my outdoor AC unit to have condensation? The AC tech added 1Ib of freon yesterday. Don't know if this has anything to do with the condensation.
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1answer
106 views

The insulation around my suction line on my central air

The foam insulation around the suction line on my ac has deteriorated, so I covered it completely with tape. Was this an OK thing to do. Am I harming anything? I have not run my AC since I did this.
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2answers
2k views

Is there any reason to not tape this vent over?

I just want to make sure this wont hurt anything. Right before I bought this house, it got a new AC and furnace but they did not replace much of the duct work. This vent is right above the AC unit ...
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1answer
23 views

How often to change Aprilaire AC Filter

I have a AprilAire #2210 Air Filtration system connected to my central AC unit in the attic (https://www.aprilaire.com/whole-house-products/air-purifiers/model-2210). I am trying to figure out how ...
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1answer
37 views

How to improve heating/AC flow in second floor?

We moved into our house about a year ago and the second floor in my house never get enough heat in winter or cold AC in the summer. Our first floor can be a 72F deg while our upstair stays at nearly ...
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1answer
53 views

Why doesn't my home cool down when the air conditioners run?

I have two HVAC systems (2x condenser outside, 2x evap in). I just got them repaired after they started leaking two years ago (have not used it for two years). Both AC's came with the house, and I ...
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2answers
519 views

Can I just cut power to a central air and heating system, or should I follow a shutdown procedure?

I am going to install some NEST thermostats. The directions say that I should turn the system off by turning off the power to it. However, I'm worried that an abrupt power cut will be damaging. Do I ...
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0answers
48 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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4answers
91k views

What to do about different rooms in the house being a completely different temperature?

I moved into a 30 year old home last December. There is a problem with the HVAC. I have included a very crude drawing of the floor plan The problem is that I can't maintain a comfortable ...
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1answer
106 views

My AC and Heat systems are separate, Can I wire one or both fan(only) controls to my thermostat?

My house used to have just Forced Air heat, but a year and a half ago, I had central air installed. When it was installed I had questions about the wiring they weren't addressed to my satisfaction. ...
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3answers
736 views

Do you remove an AC Capacitor from the circuit before or after you short it out for safety?

Is it safe to short (discharge) an AC capacitor before you remove it from the circuit. Or do you have to wait until after you remove it from the unit?
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2answers
2k views

Should I install an air conditioner pad on existing unit?

In budgeting time and money for a house I just purchased, the inspector noted that the central air conditioner is mounted outside without a pad underneath. The unit is a Carrier 38CKC024330, ...
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0answers
18 views

Carrier inside unit blower won't turn off

Inside ac is about 2 years old. Inside blower will not shut off. I have since then replaced thermostat with no change. Started turning on and off on it's own even when AC was off then now it always ...
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1answer
97 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 ...
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3answers
111 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 ...
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0answers
70 views

Changing AC Fan Motor/Capacitor with No Luck

Issues with a central AC unit: Turned it on and heard a buzzing sound, but the fan didn't start. Started by looking at the dual capacitor. We happen to have two identical units, so I tried the ...
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3answers
262 views

A/C circuit breaker blowing after 15 minutes of runtime

20 year old Amana 3.5 ton runs for 15 minutes and then blow circuit breaker on the main panel in the house. Condenser fans running compressor is running sweating making cold air. Help. EDIT Two ...
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2answers
61 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 ...
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2answers
93 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 ...
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2answers
413 views

Continued Excessive dust in home air

I'm having minor breathing issues and suspect the home air quality, which seems to be excessively full of particles/dust. The air quality is visually noticeable daily, regardless of basic cleaning/...
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2answers
1k views

Is the transformer bad on my Central Air Conditioner?

Need some help diagnosing a problem. My very old central AC unit isn't working. It's just AC and about a year ago I connected a C-Wire to the air handler when swapping the thermostat for a wifi ...
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0answers
2k views

Carrier Infinity System says “System Malfunction”

On this, the day temperatures reached 95, my AC stopped working. Here are the symptoms: The thermostat says "Infinity System - System Malfunction Call Technician". The condenser outside is spinning, ...
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0answers
80 views

Amana Prestige Air Con fan won't spin

I have an old Amana Air Con unit that stopped working. The fan won't spin. The condenser kicks in. I can manually spin the fan and it goes like a champ. I have replaced the cap already. Any ideas or ...
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1answer
85 views

Condenser is always running

I recently rewired two thermostats into one Honeywell RTH9580WF1005 Wifi Thermostat. I ran a new wire and hooked up R and W to the oil boiler and Rc, C, G, and Y to the Goodman air handler. The Y is ...
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1answer
140 views

Ecobee restarts when calling AC - old analog thermostat worked

I just installed an ecobee 4 and I have a C-wire so it seemed straightforward. The ecobee shows that it detected all the expected wires. However when it tries to call the AC it instantly restarts ...
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1answer
62 views

AC Capacitor Or Another Problem? (And What Type Of Capacitor?)

I'm wondering if anyone can help me identify the issue here: My AC went out. I'm positive there's a capacitor problem since I can actually kickstart the fan motor but it doesn't have any effect on ...
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2answers
339 views

Must my new air conditioning unit be 3 feet from the wall (or positioned backward)?

My contractor installed this system yesterday, at my property: "Trane T4TTR6060C1000A RX16 5 TON XR16 A/C 16 SEER rating R410A". Everything is working fine. I just do not like aesthetically how he ...
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2answers
3k views

Basement Humidity Increases When Central A/C is Running

With regards to humidity, I seem to have the opposite intended effect in my basement when my central A/C is running... I live in Maryland and have a 1960s Cape Cod style home with an unfinished ...
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0answers
170 views

Connect C wire to Carrier board

I got Carrier board HK61EA010 and extra C-blue wire that is not connected to the board. I wanna use this wire to power WI-FI thermostat. I cannot find the manual for this board. Does anyone know where ...
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3answers
14k views

How do I eliminate the cold drafts coming from my air conditioning vents during winter?

I have a forced hot water (baseboard) heating system in my home and added central air conditioning about 10 years ago. The cooling system's air handler is in my attic, and duct work was added for the ...
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1answer
27 views

Supports for air handler block intake

My air handler is supported by 2x4's which partially cover the filtered intake. I'd say there's 5-6" of blockage over the 21.5" filter size opening. Old air handler replaced after 12 years (due to ...
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1answer
177 views

Installing thermostat but can't disconnect power

I just bought a house, and I'm trying to save some money by doing simple projects, on my own. I just purchased a smart thermostat and I am trying to follow the directions, for installation. The ...
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3answers
166 views

Can a homeowner perform regular maintenance to prevent their HVAC system from leaking refrigerant?

Raise your hand if you A) own a home or property with an HVAC system, and B) have ever had a HVAC service person recharge your refrigerant due to a leak? I see everyone's hand is raised. Okay, maybe ...
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1answer
61 views

What are common causes of smelly HVAC?

From time to time, there's this god awful stench coming from my floor vents. It's not potent enough to where you can smell it directly at the vent, but strong enough to linger in the house and stink ...
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3answers
21k views

How do I eliminate stagnant water caused by central A/C draining outside?

So I just moved into a new house in NC that I am renting. The house has central A/C which is great, but because there is no basement so there is no basement drain. So the A/C expels the water into the ...
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1answer
357 views

Why does my A/C “bump” and cycle super fast at night?

I've got an ancient Armstrong Concept 1000 air conditioner (it was old when we bought the house 11 years ago) hooked up to a Nest thermostat. The furnance and blower is much more modern; it's an Aire-...
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0answers
47 views

AC Air Intake Compartment - Is Repairing This a Reality?

I moved into a 425 sq ft apartment about a month ago. The AC had a leak for awhile. When I found it, they replaced the AC. I have had the new AC for about 2 weeks. I have a musky old wood odor in my ...
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1answer
74 views

Are these AC ducts beyond cleaning?

I moved into a upstairs apartment- studio 425 sq feet. The building is a 2 story building. It was built in 1971. I had a bad musky meldew smell in my apartment. My AC broke and the landlord placed a ...
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2answers
100 views

AC smells horrible - Clorox in the drain tube fixes it temp

I moved into a upstairs apartment- studio 425 sq feet. The building is a 2 story building. It was built in 1971. There is a horrible foul smell from my central AC. When it is not running and with ...
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3answers
71 views

Compatible HVAC filter

I need to replace the filter in my HVAC system. What I found at the air handler in the attic is shown in the picture. It says Aprilaire Model 2200 media air cleaner. My questions are: Is it the ...
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2answers
40k views

When should HVAC returns be opened and closed?

My Pennsylvania house was built in the early 90s, has central heat (natural gas) and central A/C, and most rooms have pairs of closable air returns on the wall near the floor and ceiling. I've been ...
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1answer
96 views

Can a portable swamp cooler be hooked into a central air duct and recirculate?

I know that normally, swamp coolers take in external hot dry air, and put it out as cool wet air. I live in the hot So. Cal. desert area. A small swamp cooler is cheap to buy, but won't do my whole ...
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3answers
224 views

blower motor only starts after I turn power to it off and back on

So I have a brand new inside blower motor and capacitor in my HVAC system. However I am experiencing this undesirable behavior where occasionally it (the blower) won't come on. The rest of the system ...
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1answer
83 views

Central air conditioning system isn't working

Ok, so I have done all the research I can and nothing is working. About 3 weeks ago my A/C was running fine nice and cold no issues. Came home to a house that was 97 degrees inside and started ...
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3answers
1k views

Why doesn't my air conditioner's drip pan drain properly?

My AC Unit in my attic is roughly 10 years old, still heats/cools exactly as it should, but I noticed yesterday that the drip pan is overflowing. What do I need to do to get the drip pan to drain? ...
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0answers
43 views

The A/C thermosat screen is blank . What can I do before calling an HVAC technician?

My A/C unit is completely separate from the heater with a different thermosat. The A/C thermosat needed new batteries. I put in new batteries and nothing the screen is blank so I changed the batteries ...