For general questions regarding cooling your home.

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1answer
20 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 ...
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1answer
25 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 ...
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0answers
22 views

Why would a blower motor work with A/C, but burn out with furnace?

I've gone through 2 blower motors since I purchased the home 3 yrs ago. I never have an issue with the blower when the AC runs; but it keeps dying in the winter with the furnace. I've had 2 HVAC ...
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1answer
40 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 ...
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0answers
23 views

Leacky AC Evaporator

We just moved into our new place. So many new things need to learn. Just like the problematic AC. My apologizes if I do not know the correct terminology for some of the parts. I will try my best ...
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1answer
46 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 ...
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1answer
81 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 ...
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23 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?
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34 views

noisy Air-conditioner compressor

I bought a new split AC that worked great for a week or so, but now I can hear some annoying noise coming from the outdoor unit. The outdoor unit in installed on a flat roof so I can hear this noise ...
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2answers
43 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 ...
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6answers
637 views

Air Conditioner Can't Keep up

We just rented a condo and our A/C cannot keep up so it will run almost constantly. It can't even keep the temperature constant, it will creep up into the 80s even while running. I measured the ...
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45 views

Repair LCD TV - Possible damage from AC [on hold]

Okay, so I installed an AC on my room ~ 3 weeks ago, and my TV basically no longer works. I never had an issue with this TV since I purchased it 6 years ago. I have been experiencing the exact ...
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70 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 ...
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34 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 ...
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1answer
73 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 ...
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0answers
18 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 ...
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2answers
121 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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2answers
124 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 ...
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1answer
46 views

What is causing this air-conditioning unit to cool on cold days?

This is a temperature log from a reverse cycle air conditioning system that has run fine for getting on for 30 years. It has suddenly started to blast out cold air on days when it should be heating. ...
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0answers
45 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 ...
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1answer
63 views

Issues after capacitor replaced on AC unite

Had a checkup on my AC/ furnace a couple weeks ago. The technician said the capacitor leaking oil and not pulling enough amps. He recommended me getting a whole new system. (my house built 6 yrs ago) ...
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2answers
49 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 ...
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1answer
60 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 ...
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1answer
52 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 ...
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3answers
135 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 ...
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1answer
49 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 ...
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1answer
321 views

AC unit won't turn on: both inside blower fan and outside fan unit won't turn on

AC unit won't turn on: both inside blower fan and outside fan unit won't turn on. It is as if I had gone to the circuit breaker and cut the power to the whole HVAC system, but I didn't. I've been ...
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1answer
49 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 ...
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3answers
290 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?
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1answer
80 views

Is my AC right-sized for my house

2 years ago I had a Bryant 2 Ton 13 Seer Air Conditioner + new furnace and coils installed in my 2800 sqft ranch style house with 6 bedrooms and 2 baths split evenly between the basement and main ...
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3answers
231 views

A/C not keeping up

So, the first warm-ish day of summer finally showed up in the Black Hills yesterday and I noticed that our central air conditioning was not really keeping up... the thermostat was set at 72, but the ...
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1answer
76 views

How can I vent a portable A/C unit through bars on a window?

I need a way to fit the vent from my portable a/c unit through the bars on my window. The window bars are installed for security purposes and the average hose is way too wide. Any suggestions?
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26 views

Home air conditioner blows capacitor

My air conditioner tripped the breaker, I replaced the breaker and checked and cleaned the filters. so after some research I found out the cooling fan was not working. So tested the capacitor and it ...
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0answers
41 views

Repair A/C Evaporator Coil

The repair man says that leaks are most common in a place that is not repairable without using leak sealant, which would void a warranty and his company doesn't offer that service. My system is using ...
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1answer
40 views

While vacationing, is it worth augmenting AC with a dehumifier?

Per Does running a dehumidifier with an AC unit save money?, I understand that while a house is occupied, it doesn't make sense to run both an AC unit at normalish temperatures (maybe 75), and a ...
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0answers
61 views

20amp ac unit shut off all my power. is a 110 unit lower?

If we use a twenty amp ac window unit in blows out our power. Someone offered me a 110 unit. Does that have lower amps? Ithat lower?
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3answers
155 views

What size air conditioner for a ~230 square foot room with 10 foot ceilings?

This will be my first time purchasing a window unit, and I'm a little confused. Most charts indicate that a 7,000 BTU unit is appropriate for a ~250 square foot room, however from what I can tell, ...
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2answers
59 views

How do I properly size a 120v inline power relay to control a small air conditioner with my home automation system?

I have a 5,000 BTU, 115 volt, 4.8 amp, window-unit air conditioner I'd like to control from my home automation system. I think easiest thing to do would be to plug the unit into an inline rely module ...
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0answers
224 views

Why does my outdoor AC unit make a screeching sound when it shuts off?

MY AC cools just fine. But when it cuts off, the loud screeching sound outside can be heard from far away. This only happens when the AC goes off. There are no other weird sounds, any other time. ...
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0answers
68 views

Does an outdoor AC condenser unit (Heat Pump) require lubrication? Pic included

I have been in my house for 11 years now and every 3 or 4 years I have been taking the lid off my condenser unit and lubricating it. I just don’t know if I am even supposed to do this, but it make ...
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0answers
31 views

Air conditioned made a sound while running and stopped working

Air conditioned made a sound while running and stopped working,I guess its probably short circuited.How can I repair it by myself? What all tools do I need?
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0answers
26 views

HVAC 3A fuse shorting on cool

I recently came back from a trip, and the thermostat was still working. On turning the AC on, the wall-powered thermostat decided to die. Upon investigating in the attic, I noticed the 3A fuse had ...
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2answers
138 views

Leaking portable air conditioner

We have a portable air conditioner that we used pretty heavily over the weekend. When I woke up this morning, it has leaked water all over the living room floor. Any ideas of why? Thanks!
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0answers
29 views

My 10-year AC gives out every couple of years

In 10 years my AC fuse has gone out 3 times now; the last time, 2 years ago, the panel was replaced but before that the fuse was replaced. One electrician told me that because my panel is in the ...
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2answers
92 views

Can I pump down an Air Conditioner myself?

We are planning on having a new concrete patio poured in a couple of weeks and need to move our AC unit to make way for the slab. Is it possible for a layman to pump down the coolant and move the ...
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0answers
43 views

Preventative maintenance: mold in window Air conditioner

I just threw out a perfectly good window air conditioner because it had black mold stinking the place up. I know it can be cleaned, but I don't want to take any chances. I bought a new one and was ...
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0answers
109 views

Split AC installation: Need for a Vacuum Pump & Nitrogen cylinder

I bought a new Split AC (1 ton, LG made) and the company sent home a technician to install the unit. The guy arrived and took measurements and I quizzed him a bit about his kit and strangely it ...
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17 views

Solution for A/C Condensate Drain Line when it is not possible to drain it elsewhere? [duplicate]

I have a split A/C system in a room that runs on low 24 hours a day during Summer that unfortunately cannot be connected to any drain or pipe and which therefore requires a bucket to be used to ...
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1answer
91 views

internal fuse on air handler blows every time it shuts off

air handler for air conditioner has worked fine since I moved into the house but this year both times the air conditioner has turned on it has not restarted. Both times so far the problem has been ...
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1answer
121 views

heat pump/air conditioning wiring to thermostat

We decided to change the thermostat of our heat pump/air conditionnning unit. First 3 images are the old unit. The first 3 wires(1 and 2 picture) yellow red orange were not connected to anything, just ...