For general questions regarding cooling your home.

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23 views

Should I have a ceiling fan whose blades extend to the register?

Currently, the ceiling fan fixture and the 10x6 register are spaced by about 32" (~2 stud lengths). The room is about 350 sqft. Should we purchase a 70" ceiling fan so the blades extend out past the ...
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1answer
27 views

What should I use to seal the hole where my central air enters the house?

Wood foundation house with vinyl siding. The hole that was made to allow the lines for my central air conditioner to enter the house is basically wide open - the silicone/caulking that was around the ...
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2answers
39 views

My AC is set to 77F and the thermostat reaches that temperature but the AC keeps running. Why?

My AC is set to 77F and the thermostat reaches that temperature but the AC keeps running. What could be the causes for this? This is in connection with this post How long should it take to a 1.5 tons ...
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1answer
31 views

Air conditioner works in an outlet but not a timer

I have a wall unit air conditioner that works fine when I plug it into any outlet or power strip. However, when I plug it into a timer or a thermostat timer, which is then plugged into an outlet, the ...
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0answers
11 views

AC won't come on

We went to turn our air conditioner on in our house for the first time this summer and nothing. We can hear the thermostat "click" but no air comes out - even when set to "fan". If we switch it over ...
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1answer
30 views

Is it safe to put a window a/c unit over kitchen sink window?

Pretty self explanatory. I have a small window unit that would fit right over my kitchen sink window. About 2.25' of clearance above the counter top. Just thinking being near a water source may be ...
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1answer
22 views

help with improving HVAC performance on the second floor of an old house

I'm hoping some of you can offer some advice on how best to add a second AC in our home -- or on whether we should look for a different solution. I should say upfront that I've done a lot of reading ...
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1answer
62 views

Air conditioning with exhaust fans between two rooms

I'm renovating a space where there will be a partition of 2 rooms (3m height, dimensions are approximates, high humidity location, 23-34degC avg outside temp) Room 1: 5x7m Room 2: 2x7m Room 1 will ...
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0answers
9 views

Replacing a central a/c unit in northern Minnesota

I need to replace a central a/c unit in my northern Minnesota home. At most we cool a total of about 2 weeks annually. I am getting quotes from various installers and wonder, do I need to buy a name ...
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0answers
7 views

Portable air conditioner collecting water

My portable air conditioner is collecting water inside instead of sending the moisture out the exhaust pipe. It runs about an hour then shuts off and I have to empty it before I can turn it back on. ...
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1answer
23 views

Are HVAC Transformers Interchangable (if their power ratings match)

I'm troubleshooting the blower not starting in a friend's HVAC system. We think the issue is either a) a blown transformer, or b) the relay that controls the blower has blown. The next step is to ...
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7answers
43k views

Can I vent a portable air conditioner inside?

I recently bought a portable air conditioner and was wondering if it is absolutely necessary to vent it to the outside. I plan on using it in a room that doesn't have a window as was wondering if I ...
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0answers
20 views

Both A/C air handler and outside unit won't turn on

I went to turn on my A/C for the first time this year, and nothing happened. I checked power to both the air handler and outside unit...both at getting 220v going into the boards on each. I then ...
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0answers
12 views

Missing Remote. How do I control this Split Type Air Conditioner?

This is a long shot, but I'm open to fun ideas (Universal Remotes? A Raspberry Pi with some shield attachments that can be programmed to speak to this thing?) I'm in a rental unit where we have an ...
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0answers
66 views

AC Unit does not receive 24 volts on outside unit

My outside unit does not turn on itself, but it does work. I just did a quick repair just thinking it was the capacitor and it was only 15 dollars for a new one so I changed that out and still had the ...
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1answer
18 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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2answers
2k views

How do I properly frame an opening to angle a through-wall air conditioner?

I'm going to install a through-wall air conditioner using a purpose-built sleeve. The instructions from the manufacturer say to install it such that it angles slightly downwards to the outside (about ...
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2answers
44 views

Can I replace my furnace's high limit switch with a comparable third-party part?

I have an older Lennox furnace. The high limit switch (#60T15,130F) has gone bad. I haven't been able to find on-line this part number with the exact temp limit specs, and Lennox no longer carries ...
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0answers
55 views

Yellow wire connected to C terminal, blue wire connected to Y terminal at furnace

I'm trying to install a new smart thermostat the requires a C wire. My old thermostat operated on batteries. The pre-existing wiring system of the old thermostat looked normal (ie. red wire to Rc, ...
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0answers
14 views

Can I increase the “constant on” speed of my air handler?

I have an American Standard TWE049E13CB air handler with a variable speed blower. The manual has a chart to adjust the dip switches for fan speeds for cooling, heating, fan off delay, and auxilary ...
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3answers
42 views

Can I unplug attic fan over garage

I recently moved into a new house and during the inspection, the inspector noted that there was a fan in the attic space above the garage. He also mentioned that I could probably just unplug it ...
3
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1answer
582 views

What are these valves downstream of my water heater?

Our water heater has two valves located on extended pipes perpendicular to the hot and cold water lines. When Spring hit, the maintenance people in my complex mentioned we needed to turn the valves ...
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0answers
47 views

Did I wire my Nest thermostat correctly?

I installed a Nest 3rd Gen thermostat in my house over the weekend, and am not 100% sure I did it correctly. It powers on, and air does come out, however the force of the air isn't strong as it used ...
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0answers
26 views

Improving air flow using supply and return exhaust fan with split type air condition

I have slight issue with uneven temperatures between two rooms. Say we have two rooms, Room 1 (cold room with AC) and Room 2( without AC, hotter room). Room 2 is ventilated by Room 1 AC by opening ...
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2answers
2k views

thermostat batteries replaced, AC unit won't start

Came home from work to find no AC. I checked the thermostat and the display was blank. After replacing the batteries and resetting the program, my AC unit never started up. I checked: - The AC unit ...
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2answers
42 views

Please help me choose an AC option

I rent an apartment in Anchorage, Alaska. In my 15 years in this state I have never even considered air conditioning, but this apartment gets beastly hot in the summer. It has huge windows facing ...
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0answers
12 views

Safe to install a 3 Ton HVAC with 8" ducting

I currently have a pretty old 2.5 ton HVAC installed and it broke down recently so I need to replace it. I've had a couple companies come out and give me bids and they both insist that I need to ...
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1answer
181 views

How to install a 4-wire a/c & fan thermostat with only 3 wires

My home currently has a central a/c unit which is controlled from an 3-wire old mercury switch thermostat. I want to replace it with a newer Honeywell that requires 4 wires. The existing thermostat ...
0
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2answers
178 views

What is causing cracking and creaking noises in the ceiling and walls?

I've asked numerous people and no one has the slightest idea of what this can be. I'm hoping y'all can maybe come up with ideas to help figure this out. I moved to the condo three months ago. For ...
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2answers
25 views

Why is my A/C drain line not draining at all?

I have a unit that is installed in the attic and is about 10 years old. My problem is I normally have to go up and empty the drain pan every month or so, but lately it's been every 3 days. I have ...
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1answer
40 views

AC Condenser Fan Won't Spin and Overheats But Can Be Kickstarted

Symptoms: AC kicks on, but blows warm air Found issues: AC kicks on and AC condenser appears to turn on (makes noise), but the fan won't spin. A few seconds later, the condenser fan motor overheats ...
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2answers
158 views

Issues after capacitor replaced on AC unit

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 was built 6 yrs ...
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1answer
48 views

What inspections/maintenance should be done before first air conditioning of summer?

I'm a typically handy guy who knows his limits. I recently moved into a new house so am unfamiliar with the history of the equipment. Before I switch the thermostat to A/C for the first time this ...
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2answers
28 views

Is an Ionizer Air Purifier effective against birch pollen?

I spot an Ionizer Air Purifier Air Cleaner Air Ionizer and I want to understand whether it could help to alleviate symptoms due to birch pollen particles such as itching, tiredness and shortness of ...
4
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3answers
3k views

How can I improve ventilation in my room with a window fan while filtering pollen from a nearby tree?

This is a campus building in Aalto University where you have a tree about 10 cm away from the window. The Espoo city does not allow the student organisation AYY to cut down the tree. There is a poor ...
1
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0answers
45 views

AC capacitor testing with multimeter

When running through my check list to start the AC for the spring/summer I noticed the outdoor fan was not running, hence no cooling. I'm using a basic digital multimeter to test a capacitor with the ...
2
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3answers
57 views

portable air conditioner exhaust

I have a problem similar to this: How can I vent a portable air conditioner when there's no window? I do have windows but I cannot modify them. Cutting holes in walls or any similar ...
1
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1answer
26 views

Why might a thermostat refuse to switch from Heat mode to Cool mode?

I have this Honeywell RTHL2410C programmable thermostat and typical Florida electric AC system. Starting this Spring, it has started behaving strangely when switching from Heat to Cool mode. The ...
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1answer
75 views

Can I use a portable air conditioner with a casement window?

My apartment has windows like this, where they rotate out upon a vertical hinge. I live in Seattle, so I can't rely on an evaporative A/C unit because the humidity is too high. And all the portable ...
2
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2answers
11k 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 ...
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1answer
1k 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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1answer
24 views

What percentage of window AC depth is outside? [closed]

My HOA has a restriction of 16 inches depth on outside for a window A/C so wanted to know if a total depth of 21 inches for an AC is going to be fine. Thanks
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6answers
43k 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 ...
3
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1answer
59 views

Do you need to service air conditioning units?

We recently had an air conditioning unit repaired. When had done the job, the guy asked when the last time was that we had our units serviced, and looked shocked when we said we never service them; ...
0
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0answers
24 views

5 year old Air handler fan not rotating or slow

5 year old Heil AC unit not cooling. It appears the air handler in the attic has a fan that is not turning when I turn on cooling from the stat. If I turn on the fan from the stat it turns but ...
0
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1answer
47 views

Does it take long time to turn AC unit around?

I am wondering if it can take a full day of work to turn around AC unit like in this post . Must my new air conditioning unit be 3 feet from the wall (or positioned backward)?
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1answer
86 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
33 views

can I use AC top cover for Trane XR16

My contractor installed this system yesterday, at my property: "Trane T4TTR6060C1000A RX16 5 TON XR16 A/C 16 SEER rating R410A". ...
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3answers
65 views

How is the Air Conditioning wiring supposed to connect to my furnace?

My dog has chewed through my wires on my unit that turn on my fan at the ac unit. This is not the first time. Its always been an easy fix until now. He actuall pulled the wire from the unit and I ...
3
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1answer
115 views

Mounting a window air conditioner on top of a sliding horizontal window

I need to install a window air conditioner in my master bedroom. However, the only suitable window there is a horizontal sliding window. To complicate things more, I need to place it on top, since my ...