For general questions regarding cooling your home.

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1answer
72 views

Should my A/C compressor come on when I turn only the fan on?

I have a bog standard HVAC system with a Nest thermostat. When I tell the theromostat to turn the fan on for 15 minutes the A/C compressor also kicks on. Is this normal?
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1answer
86 views

Air conditioner that keeps turning off

My air conditioner unit outside keeps on turning off and the fan in the house keeps on running. When I switch the circuit breaker off, then on the outside unit works again. Do you know what might ...
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1answer
392 views

Inverter air-conditioning units or non-inverter air-conditioning units?

I want to purchase new 8-9 units of air-conditioning for my new house. For the hall, kitchen and all the bedrooms. Some people say inverter air-conditioning is only suitable if you are using more ...
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2answers
218 views

Can I redirect airflow from AC to under the house?

I have a small 950 sq ft single floor house, with a crawl space and force air heating. I have a portable Air Conditioner that has a large Intake and Exhuast tube. The issue is that none of the ...
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1answer
249 views

Air Conditioner woes: water pooling in basement, condensation on ducts, frost on outdoor copper pipe

Can someone help diagnose what's wrong with my air conditioner? The symptoms are: the air that it is blowing is not very cold It's colder than the ambient air, but not cold enough to cool the ...
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1answer
46 views

Is this pipe layout acceptable?

We recently had our heater and air conditioner replaced, and now the drainage pipe is installed on the floor of the basement. It's quite annoying and it wasn't like that before (it was on the walls ...
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1answer
64 views

How do I connect original to new wiring when repairing an electrical fault in an AC unit?

The AC failed at a neighbor's house and the problem was quickly diagnosed as electrical. I saw that a few of the wires had corroded and one had actually burnt through. The unit is only 5-6 years ...
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1answer
78 views

AC unit (turned on year round) leaves so much ice in the blower causing no cooling (pic included)

My mother has asthma and tells me she needs the AC on almost year round. The AC unit is outside the condo we own, and it connects to the coils in the heater/ventilation system. We are experiencing ...
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1answer
204 views

Single phase vs three phase commercial air-conditioning

I have a building in which I am going to replace 9 3ton units. There is 3 phase in now but my tech suggests single phase. My clients pay for their own electricity. These machines have been in service ...
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2answers
98 views

Hot water heating system: Renew or replace?

Our home was built around 1963 and has Gas powered Hot water based heating, some portion of the house is floor heated and some with radiators emitting heat from hot water. The heater may be 10-12 ...
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2answers
103 views

Can I stack my boxed air conditioning units for storage?

I pulled out the AC units from the windows and have put them back in the original boxes that they came in. Can I stack them one on top of another for storage? I know not to stack the units normally, ...
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1answer
1k 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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3answers
1k views

extra thermostat, electric dampers and 1 furnace [duplicate]

I have a problem similar to others that have posted: balancing heating/cooling throughout the house. I have already played with adjusting the vent's air flow as well as the manual dampers in the ...
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1answer
515 views

Does a Daikin AC remember the settings when it was last turned on, or what the remote is set to on power-on?

This is a very specific question that I've been trying to wrap my head around and can't figure out. I have a Daikin Air Conditioner that has a "human sensor" which automatically switches to ...
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3answers
9k views

Why does my Central A/C Keeps Blowing its Fuse?

For years, my A/C condensing unit has blown a fuse once, maybe twice a year. It's 27 years old now and blew a few fuses last spring. Now it blows a fuse every few days. So, I replaced a bad running ...
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1answer
142 views

Why is my AC blowing from this pipe and freezing up periodically?

I looked under my mobile home and found a hose coming from the flooring. It is blowing cold air out, and it also looks like water has been dripping out. I think that this is normal, but why is all ...
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1answer
514 views

Is this a thin window air conditioning unit?

I'm trying to put air conditioning in my master bedroom. It has a loft and hence high ceiling with around 500 sq ft + 350 (loft). It is also on the third floor which is pretty high. As far as I can ...
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2answers
1k views

What could be wrong with my A/C unit?

I just installed a new compressor fan on my outdoor A/C unit. Before the fan went bad, it was working fine and had just had its annual service check (the service guy said the freon was fine, ...
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1answer
33 views

Is it possible to plug an AC into a kitchen stove hood exhaust?

I live in an apartment and need to install air conditioning to cool down one room (about 20 m2), from time to time (1-3 hours per sunny day, for a total of 3 or 4 months a year - typical European ...
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0answers
29 views

What to look for in central air installation?

I'm having an HVAC company install a York central air unit in my house today, and I'm wondering what things I should be looking for in the quality of the installation? Existing York central heating ...
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0answers
27 views

Can you hardwire a residential through wall A/C to a 3H/2C thermostat?

I have a boiler with radiant baseboard throughout my home with four zones of heating and two through wall air conditioners and Aprilaire 350 Humidifier. I am upgrading my thermostats to the Honeywell ...
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0answers
23 views

Buying used heat pump/AC

I'm planning to buy and install a used heat pump/AC at some point in the near future (probably looking for sellers on Craigslist or similar), and want to know what I should look for to know if the ...
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0answers
36 views

Thermostat needs to be set very high to work

Our home thermostat is behaving strangely. Let say it shows that the current room temperature is 60F. If we set it to 63F it will start the Fan (ventilation) but will not actually start the heating so ...
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0answers
65 views

How can I stop an in-the-wall air conditioner from leaking air into the home?

As far as I can tell, the air conditioner fits nearly perfectly in the hole, but there is considerable air leaking into the home through the bottom. I think it may be because of metal strips that line ...
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0answers
37 views

Lint when running AC

There seems to be a lot of lint when I run my AC unit. I have recently replaced the filter and made sure that the filter is put in correctly. What could be the issue?
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0answers
251 views

Furnace not working properly with digital thermostat

I have been attempting to use several different types of digital thermostats to replace my old mercury thermostat, however none of them are able to control the furnace properly. All of them are able ...
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1answer
36 views

AC Blower Relay

I have a question? How much current does it typically take to close the blower relay on a air handler. I recently got a new thermostat which requires an external transformer and it doesn't appear to ...
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0answers
53 views

Covering Up A Large Gap In A Wall

I was looking for advice on how could i create a partition between my two rooms which have a huge frame in between them. The place was originally covered by curtains but putting up curtains on the ...
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0answers
20 views

cooking on a hot&humid day

I have 2 window air conditioners in my house. None of them seem to have a setting to bring in (a little bit of?) fresh air. When we cook, the house becomes a bit smokey. Also, the vapors of freshly ...
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0answers
60 views

Can we convert fixed speed compressor to a variable speed compressor?

There are two types of compressors normally used in our household refrigerators and AC. First is known as fixed speed and second variable speed drive compressor. The later compressor type (VSD) saves ...
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0answers
93 views

How to insulate this portion of split AC Pipe?

I bought a new Hitachi split AC lately which isn't cooling as much I was expecting. I checked for leaks/bad installation and found this. (This is connection point of external pipe and pipe which ...
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0answers
120 views

What could be causing our air conditioner circuit breaker to keep tripping?

Our air conditioner circuit breaker marked "AC", is tripping frequently after the AC unit works for a while. Sometimes as long as an hour or more and, sometimes as short as few minutes. We were told ...
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0answers
54 views

How do I thaw the lines to my condensing unit so that it will turn off?

The lines to the compressor are frozen, and the outside unit stays on even when the thermostat is off. How do I fix this?
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2answers
122 views

Acceptable to install whole-house evaporative cooler with only a single supply vent?

My new house has a 20+ year old evaporative cooler on top of the roof. The cooler is ancient and rusted, difficult to service due to the location, and the forced air heating ductwork it feeds into is ...
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0answers
273 views

How can I check if the ionizer on the air conditioner is working?

I am looking for a way to tell if the ionizer on my air conditioner is working. Searched the web and only answers were related to stand alone ionizers and using an incense stick's smoke. This is not ...
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0answers
59 views

Are wall air vents a potential problem?

A house I'm looking at has A/C vents in the walls, rather than in the ceiling or floor. I've never lived in a house with air ducts in the walls. Can I expect to have problems? The house was built in ...
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0answers
79 views

What steps are required to convert R-22 Freon to a new R-410A Puron system?

I am house hunting in Houston. Every 2000-2004 house we've seen so far uses old A/C Unit and coils for R-22 Freon and not the newer R-410A Puron. Reference: ...
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1answer
333 views

Do I need a sleeve for through the wall air conditioner in new construction?

I am about to buy a through the wall A/C unit for a small building, which the builder will frame out for the A/C. Is the framing enough, or do I need to buy a sleeve for A/C?
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0answers
62 views

Two A/C units are close to each other and turning one on turns the other on. How to fix?

I had an Air Con unit installed in the Living Room and another in a bedroom adjacent to the Living Room, both from the same brand. The Air Con units are actually next to each other, and only ...
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1answer
408 views

Can I replace this Airwell thermostat?

I am in market to replace my simple A/C control unit with one that integrates with home my z-wave based home automation system. However, before I make the splash and buy a compatible thermostat, I ...
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0answers
33 views

Is my heat pump's condenser fan motor bad? [duplicate]

The other day my AC stopped working. I'm thinking the condenser fan motor has gone bad (unit is ~10 years old). Here is what I did to troubleshoot which led me to believe it was the fan motor. ...
0
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1answer
465 views

How do I use a vaporizer/humidifier? [closed]

An attic has been converted into a bedroom and it's very uncomfortable to sleep in, the air is very dry. I bought a humidifier but it didn't come with instructions. This may be a silly question but I ...
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0answers
795 views

A/C system reports Limit Switch Stuck Open

Unit is a York GM9S080B12UP11G. When switching thermostat to cool, the system activates the compressor fan. Also, I can hear gases moving through the pipes running to the compressor. However, the ...