For general questions regarding cooling your home.

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1answer
43 views

What type of air filters are these? Are they any good?

I'm pretty sure these air filters have been in the house for 30+ years. I'm not sure what type of filters they are. Are they disposable or can you clean them? Are they efficient at all?
2
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1answer
54 views

90 degree angle in air conditioning ducts, should I avoid them?

I have forced air at my home and air ducts run pretty much straight. However I want to add bathroom in the basement and because of low ceiling hight, the main air conditioning duct has to be re-routed ...
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1answer
9 views

Aircon (aspen pump) condensation

I have a split system air conditioner that has been installed. Is running fine. However the ASPEN pump does not work. I was wondering if anyone knows how to wire them or has done before.
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1answer
27 views

Is it possible to put portable air conditioner outside the house?

I don't know if this has been done before, because because I rent, can not do any installation therefore a slip and window A/C is not an option for me and only portable is okay. But I heard that the ...
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0answers
24 views

Liquid line freeze up

Why would the liquid line on residential air conditioner freeze up during winter months, even though compressor isn't running? Have shut breaker off to assure outdoor unit isn't coming on.
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3answers
59 views

What is the correct way to seal/flash coolant lines through T1-11 siding?

Our contractor installed an AC compressor and did a poor job of it. He ran the AC coolant lines through the middle of the wall and then just squirted some expanding foam into the hole, like so: ...
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1answer
45 views

HVAC Contractor Didn't Install Drip Pan

I recently got the A/C unit and furnace in my basement replaced. When the company came out to do the quote, they stated that they thought I should have a drip pan, and the proposal that they gave me ...
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0answers
29 views

Mini Split condensate pump to condensate drain

I'm working out the details of my Mini split. I know by code I have to have it connected to a 3/4" condensate line going outside. The Mini Split's air handler is located on an inside room where I'm ...
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1answer
111 views

What is the rated power of American central air-conditioning control circuit?

I want to know what is the rated power that American central air-conditioning 24V control circuit can supply, which is also the power supply for Nest. Nest gets its power from the 24V control ...
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5answers
226 views

Low voltage fuse blowing in furnace

I have an outside A/C compressor and indoor furnace fan combo in the attic. The unit was off and the 3 amp fuse was blown. I replaced the fuse and used the thermostat to turn the fan on followed by ...
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2answers
69 views

Is heating feature in an air conditioner bad?

I was looking to buy an air conditioner (split system), recently and a local dealer told to go for ACs with cooling feature only and not ACs with heating feature, as they require more servicing and ...
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1answer
54 views

Is this 230v motor wired for 115v operation

I have the following wiring diagram for the motor I am replacing. After looking at the wiring as shown here, I see one black and one purple wired to the terminals. There is a second set that is ...
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1answer
33 views

Can I vent a portable airco exhaust in the wall cavity?

I'm renting an appartment in a small appartment block, which got very hot last summer, and very moist in winter when hanging our laundry. The obvious solution would be to place a protable airco ...
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1answer
24 views

Installing a window unit in a metal window frame with two raised lips

I have a window that has a metal frame with two raised lips. All the diagrams in the installation manual show only one raised lip. The problem is that the bottom frame of the window unit that is ...
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0answers
26 views

How to connect 4 fan coils with one wall control thermostat?

I have 4 fan coils (Sabiana sk-22)and I want to connect them with one wall control thermostat. How can I do?
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0answers
18 views

size of communication cable of the central ac as per tonnage

i want to know the communication Cable Size As per the tonnage of the centralised ac as per the standard ac rules & Regulations
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1answer
164 views

Air conditioning unit sitting on the ground

We've lived in our house 11 years. Our air conditioning (condenser) unit, the big boxy thing sitting outside, is not sitting on a concrete slab. It's just sitting on the ground and we noticed this ...
2
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1answer
41 views

Should I try to repair an A/C condensate pump that has suddenly started getting real noisy?

So my Little Giant Condensate pump suddenly started getting real noisy when it kicked on. I pulled the cap off the unit and the water sure is dirty in there. I have done nothing with the unit in the ...
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1answer
41 views

How to remove old A/C piping in my house?

When I had my new A/C installed I moved it to the other side of my house (right next to the furnace), so now I have a bunch of old copper piping running about 30 feet from one corner of my house to ...
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1answer
61 views

Can the back side of a window type aircon exhaust in an empty ceiling area?

I'm planning use a window type A/C on my little attic room. My A/C unit is just .5 HP, just enough for the small room. The problem is there's no proper exhaust area like the standard Window type. ...
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1answer
178 views

AC Blower running very slowly

I have a Ducane heat pump. When running in AC Mode, the outdoor fan and compressor kick off just fine. The blower fan seems to kick off as well, though it's not putting out very much air. I can ...
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4answers
78 views

Why is humidity high from one unit but not the other?

Two months ago, I posted about our upstairs a/c not cooling all of a sudden. I ended up replacing the capacitor for the blower fan and the contactor, which did the trick. AC cools!!! However since ...
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4answers
265 views

Can a homeowner without a Section 608 EPA license legally connect his own gauges to his own air conditioner if the unit uses 410a refrigerant?

It has been suggested by at least one moderator on this site that EPA Section 608, which restricts who can purchase and handle refrigerant, including who can connect a set of manifold gauges to a ...
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1answer
52 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 ...
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1answer
40 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 ...
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1answer
26 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 ...
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0answers
43 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.
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0answers
55 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 ...
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2answers
89 views

One portable air conditioner - want to use it in two rooms

I have a Kenmore portable air conditioner model - 408.72012. this particular model can be housed on the outside of the building and the A/C air is vented into the inside space (normally through a ...
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1answer
38 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 ...
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2answers
628 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 ...
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0answers
53 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 ...
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1answer
64 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 ...
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0answers
56 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 ...
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1answer
108 views

Chattering contactor, what should voltage be when AC is on/off?

I have a Nest thermostat that I believe is the culprit of this issue. I've already replaced the contactor once and now the new one is chattering and not kicking the AC on. When the AC is turned off, ...
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0answers
42 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 ...
1
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1answer
55 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
44 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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1answer
246 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
348 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
50 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
132 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 ...
8
votes
1answer
220 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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0answers
50 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?
0
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1answer
99 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
99 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 ...
3
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6answers
957 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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0answers
83 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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0answers
75 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 ...
2
votes
1answer
557 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 ...