For general questions regarding cooling your home.

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9
votes
2answers
6k views

How can I further diagnose my central air conditioning compressor fan motor and capacitor?

I have a 15 year old Bryant Central Air unit in my house. Yesterday it stopped working. Here is what I have checked. The breaker in the basement is not tripped. The furnace works fine from the ...
1
vote
1answer
74 views

Extending Length of Air Conditioning Drain Pipe

I live in a multi apartment building. All the neighbors has AC. Many AC's has condensation drainage pipes which descent into the common garden and are cut at about two meters above ground. Others are ...
1
vote
2answers
4k views

Air handler condensation draining problem

For the life of me, I cannot figure this out. My air handler and heat pump were installed in 2006 and work great. For the first summer since I've owned the home, condensation started to not drain ...
0
votes
1answer
44 views

Should there be a cap next to my furnace ac drain?

In the picture below, the left side has a good amount of airflow while the ac/blower is running. The tube on the right is the drain that the condensation flows out of to the floor. Should there be a ...
0
votes
1answer
38 views

How to install a window ac in a room with improper window provision

I have a window ac that I used it earlier. Recently shifted my premises and my bed room has a window with two wood doors that open oppositely and a lengthy wood stick in the middle. Window is ...
2
votes
4answers
15k views

How can I calculate the power consumption of an A/C unit?

I have an AC unit with the following specs: Cooling Capacity: 1260 kcal/h, 1.47kW, 5000 Btu/h Fan Motor Power: 0.034 kW Current: 0.155 A My question is how much power does this unit actually ...
7
votes
2answers
3k views

Why do my lights dim, when my neighbor's central AC turns on?

I understand that the lights would dim with a dryer or large AC on my own circuit system, but is it normal for that to happen when my neighbor's central AC turns on? I validated the timing (hearing ...
0
votes
0answers
52 views

Will a modern AC automatically switch between cooling and heating?

Say I set the temp to 23C on a hot day but the weather turns cold eventually. Will it detect later that autumn came and heating is needed? I'm talking about a Panasonic inverter AC.
0
votes
0answers
64 views

Older home with no AC plenum…replace our entire AC system as suggested?

We have an older home that has a large living-area/fireplace room; the AC unit sits over it in the attic. Earlier this year, in that room, we noticed a crack beginning to form in the ceiling sheet ...
0
votes
1answer
71 views

Should I add a return or another supply to a large room with only one supply?

I just moved into a new house and I have that one room that always seems to be hot. It's on the 2nd floor of the house with the attic over it. The other 2 rooms on the 2nd floor are always a nice ...
1
vote
1answer
49 views

Can using a new evap coil on top of an older furnace cause problems?

I am getting quotes for a new R410A condenser unit/evaporator coil from several HVAC contractors. A salesperson refused to give me a quote unless I purchase a new furnace as well. He said that he has ...
1
vote
4answers
10k views

Confused on what AC Unit to purchase and install?

I am replacing a 30 year old AC unit and I have had 4 estimates. 2 of the 4 people did not even take any measurements and the other two took a lot of measurements. I am leaning towards the ones that ...
3
votes
2answers
829 views

Can I cut a hole in the brick to install a through the wall air conditioner in a basement?

I am looking to install a through the wall air conditioner in the basement. I don't want to block the one window. There is already a window in the brick. I don't know if there is any kind of ...
0
votes
0answers
58 views

Furnace not working

I came home to my furnace having no power even to show trouble codes. I turned off my breaker opened the blower door and it had a blown 5 amp fuse on the curcuit board. I replaced the fuse turned the ...
0
votes
0answers
67 views

Non-Permanent Air Conditioner for Townhomes

I own my in townhome and my HOA specifies that I cannot have a through-wall or otherwise permanent air-conditioner. Additionally that window mounted units must be removed sometime in October. However ...
6
votes
6answers
27k views

Turning off Air Conditioning when out of the house for extended time

Most people that live in cold climates know that you should not turn your heat off when you go away for an extended period of time. Just turn it down so the pipes don't freeze. What about the ...
0
votes
0answers
49 views

AC fan not turning on. It's silent

Replaced the capacitor 2 weeks ago because AC (Lennox) outside fan was not running, blowing in warm air. And the unit started working. Then again yesterday (95F outside) same thing. Replaced the ...
8
votes
1answer
256 views

Rheem Heat Pump A/C Mode Delay Cycle In Hot Weather

I have a Rheem 15PJL48A01 heat pump which has been working correctly for years, and is maintained properly. It is hot here currently and so it is operating in cooling mode. Yesterday and today, it ...
1
vote
1answer
60 views

How can I improve my ventilation throughout my house?

I just bought my house and it stays rather cool. However I've found while painting that the flow of air through the house is limited. My vents are all on the base board/wall if you can imagine. Not ...
0
votes
1answer
53 views

Is the huge white metal grille on a ceiling called a “cassette AC”. Is it supposed to be noisy?

I am looking to buy a house, but i'm worried about the AC noise. It has the compressor outside the house. The evaporator coil is inside the attic on top of the furnace. This attic is above the ...
4
votes
3answers
16k views

Why is my A/C condenser fan motor wiring backwards, and how can I fix it?

I've just replaced my condenser fan motor on my home A/C unit with this unit: http://www.grainger.com/Grainger/GENERAL-ELECTRIC-Condenser-Fan-Motor-2PRA6 The HP, RPM's and amp ratings all match. The ...
0
votes
1answer
499 views

Why does AC unit need condensation drain trap?

I am modifying the drain pipe that drains my inside AC unit. When I purchased the home, there was an electric drain pump tied to the unit. Upon investigating why the unit needed one I found a pipe in ...
0
votes
1answer
171 views

Air conditioner never seems to shut off

My air conditioner when left on never seems to shut off. Even during the night when it substantially cools down it still seems to run all night. I live in Ottawa, Ontario and for example tonight the ...
7
votes
5answers
37k views

How much cooling can I expect from a central air conditioner?

Yesterday's high was 106.0F, low of 79.2F, full sun all day. AC set at 78F, indoor temperature reached about 85F. Today's high was 105.4F, low of 81.1F, full sun all day, now about 102 at 7pm. AC ...
0
votes
0answers
58 views

Breaker for compressor tripping when a/c reaching stage 2

My breaker for the compressor is tripping when my a/c is switching to stage2 in very hot weather. Is there anyone who can give me the steps to troubleshoot this issue?
8
votes
5answers
436 views

Is air conditioner installation a DIY project?

We got a bargain on a brand new 6.2kw Split System Inverter Air Conditioner. The quotes we've received for installation are almost as much as the unit cost itself. Is this something I should be ...
0
votes
2answers
121 views

Blower motor lost RPMs after reversal of fan direction

My air handler requires a clock wise rotation of the fan motor. After installing a new motor I found it was set in the counter clockwise position. I changed the wires (switched inline connection on ...
0
votes
0answers
88 views

Will a DIY Air Conditioner help my HVAC Central Air system?

So the husband and I just moved to Texas. We went away for the weekend and turned our HVAC central air from 68F and ON to 75F and AUTO. For some reason when we got home the AC wouldn't drop. Now I ...
2
votes
1answer
1k views

What is the best place to install an Air-conditioner in a room?

I'm trying to decide where to install my ductless split Air-Conditioner. For the indoor unit, is it ok to install it above a window? will placing the indoor unit at the corner of the wall reduce the ...
2
votes
2answers
180 views

What could cause my in-wall air conditioner to blow 3 power boards?

I've had my house for nearly two years, and suddenly my in-wall air conditioner stopped working. I replaced the main power board, and it worked again...for a week. I replaced the main power board ...
3
votes
6answers
40k views

What could be causing an A/C blower motor to turn off randomly?

The Blower motor on my AC unit turns off at random times while the outside unit continues to run which is causing the coil to freeze up. The blower won't come on for 30-45 minutes after the AC has ...
2
votes
5answers
2k views

How long does it take to make money back on a new air conditioner?

I have a townhouse built in 1975 with an air conditioner on the roof. I have no idea how old it is but I can imagine it is on it's last legs. What's more, this last month's energy bill was one of our ...
3
votes
5answers
14k views

What can cause the capacitor in an air conditioner to fail?

I just had the capacitor on my air conditioner fail. It was explained to me that the reason for this was the oil inside the capacitor got too hot, expanded, made the whole thing bulge, and no more ...
0
votes
0answers
84 views

AC blower fan turns off after 30 minutes

When AC is turned on, everything is fine but the blower fan shuts off after 30-40 minutes, and I see condensation on the pipe just next to the furnace after a while as the AC unit has been running. If ...
0
votes
1answer
227 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 ...
0
votes
0answers
29 views

passive air exchanger on split air conditioner line

Second Stage (Passive) Exchange on Split Air Conditioning System Return Line? I am wondering if there's any chance I can harm my LARGE split air conditioner by installing a passive (parasitic) air ...
0
votes
0answers
78 views

how to install a casement window ac unit in a standard horizontal window?

Ok... I have scoured the internet. I was given 2 casement window ac units. Both of my heat pumps were stolen and this is an army wife turned widow make do type situation for while I save to replace ...
4
votes
3answers
2k views

Why is the upstairs a lot hotter in a 2 story duplex?

I've lived in my current duplex for about 5 years now and every summer, my upstairs portion of the duplex gets noticeably hotter than downstairs. I couldn't give an exact measurement but 10 degrees ...
1
vote
2answers
128 views

Compact width Window Air Conditioner

we would like to install a window air conditioner in our living room window. The window is quite narrow (18.5" wide). The room is fairly big, ~400sqft. We would like to install a 10000 BTU window AC ...
0
votes
1answer
404 views

Honeywell RTH7600 does not responsd

Just installed new Honeywell RTH7600. All wires are correct and the unit displays fine. The issue is that heater and AC do not turn on at all. I even put the fan to ON instead of AUTO and that does ...
0
votes
1answer
130 views

AC continues to run for several minutes after shutting off

When I turn off the AC it continues to blow cold air for several minutes. I realize this may be an energy savings feature, but I'd like to know if it is possible to disable it. In other words, what ...
3
votes
3answers
536 views

Can I use an outlet splitter with my air conditioner?

I live in an old apartment building, and there is only a single outlet anywhere near the only window in my living room. My Air Conditioner works great with it, but now I can't use the desk lamp and ...
1
vote
1answer
60 views

Why won't my air conditioner work after a power outtage?

The air conditioner does not work at all. I'm wondering if it's a power problem? The thermostat isn't even on and doesn't show a temperature. Before it stopped working the power had gone out due to ...
1
vote
1answer
132 views

Should I run my condensate pump after pouring bleach water into it for cleaning?

After I add the 50-50 mix of bleach water to the condensate pump to clear out the algae, do I add water to the pump? On top of the condensate pump it says "do not run dry" so I was wondering do I need ...
1
vote
2answers
38k views

Why do the evaporator and suction lines freeze when there is low refrigerant?

In an AC, why does a low refrigerant condition cause the evaporator, and/or suction line, to freeze up?
1
vote
2answers
8k views

How do I replace a condenser fan motor in a central air unit?

The condenser fan motor on my central air unit has seized up (tried like crazy to turn it it, but no go). I'm not sure how old the motor is but I'm guessing it's original, so about 12 years old. I ...
3
votes
2answers
2k views

Can I attach a HEPA filter to the HVAC outlet?

I am currently living in China and want to improve the indoor air-quality. We have a Hitachi R410A HVAC. All the room in the house are controlled separately. Just to make it clear up front, I am not a ...
2
votes
1answer
10k views

How should I evaluate my central A/C to see if it's working properly?

I was once told by a service tech that they evaluate how well the system is performing based on temperature difference between the the return and supply sides. On our first really warm day (80F+), I ...
2
votes
2answers
2k views

How can I reduce heat transfer around my window unit air conditioners?

I have three old window units in my house and they function as my A/C. I am concerned about the amount of heat seeping into the house and cool air leaking out around the A/C units themselves. They're ...
3
votes
3answers
320 views

How can I turn the light off on my fujistu halycon split unit

I run the A/C at night and the unit has green lights that turn on to indicate its on. How can I turn the lights off without turning the A/C off?