Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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1answer
31 views

In a multi-zone mini-split setup, how do you heat heat rooms without an evaporator?

I recently asked for recommendations for multi-zone heating in a small home (intended for college students). The responses overwhelmingly recommended multi-zone mini split systems. I fully agree, my ...
19
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6answers
2k views

How to disconnect air conditioner lines from outdoor unit?

I need to temporarily move the outdoor unit to one side to access the wall behind it. Is it possible to do this with basic tools? I just need to disconnect the copper pipes as there's enough slack in ...
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1answer
26 views

Air Conditioner Cooling Ability

Is a 9000 BTU heat pump roughly equivalent in cooling ability to a 9000 BTU window air conditioning unit? If not, what is an approximate way to "translate" between the two, in order to obtain a heat ...
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2answers
84 views

How can I use a pre-installed A/C unit for heat?

I just bought a house with a relatively two-year old A/C unit (installed 2018) and a natural gas furnace connected to central air. I'm interested in using the A/C unit as to heat the air in lieu of ...
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1answer
71 views

How can I protect window air conditioner from bird droppings from above?

I live on the second floor in a tall building. My previous air conditioner (AC) was getting hit several times with pigeon poop. Not only the poop was going inside the unit, or getting stuck on top, ...
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1answer
55 views

Brand new AC unit makes whooshing sound and air “chokes”

My brand new AC recently started making a whooshing noise. It sounds kind of like a sudden gust of wind, but it repeats every few seconds. Another way I can think of to describe it: imagine a PC ...
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1answer
28 views

Is there a small ductless condenser to fit in A/C sleeve?

I own a 350ft studio co-op unit which currently has an old AC unit and two electric baseboards for heat. I was thinking it would be nice if I had a single high hat in the middle of the room connected ...
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0answers
29 views

Thermostats with or without variable temperature differential (swing)

I am looking at replacing my thermostat, and don't really need or want one with geosync. I am thinking of the honeywell RTH9585wf. Currently I have a lux that is not wifi but programmable. It ...
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0answers
15 views

Condensation on air con causing leak, best way to insulate

In the roof there is a large metallic air con box, the drip is coming from one of the corners, see photos. An engineer has said we need an external drip tray, and/or additional insulation. WHats the ...
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0answers
38 views

4 rocker light switch makes a popping noise, and I've noticed it a few times when the Air conditioning clicks on? Thank you. Kind of worried

My master bathroom 4 rocker light switch makes a "Pop" noise several times a day. Tonight, I think it popped when the air conditioning went on(yes air conditioning :) Could have been a coincidence ...
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2answers
46 views

What is the difference between these air ducts?

I'm fitting a portable AC into my workshop to take the edge off summer temperatures. For convenience, to make sure it works before bashing a hole in a brick wall, and to confirm it will help, I am ...
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1answer
42 views

Portable AC unit extraction hose routing

I've got a "portable AC unit" which is a free-standing unit, not a permanent installation like a high wall split system. They require to be vented to the outside world, otherwise they simply don't ...
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0answers
21 views

Is it ok to seal the the outside rail of an in-wall AC/heater in the winter?

I have an Amana in-wall AC/Heater. In the winter I feel that it creates a draft and allows cool air to sneak in. I'm thinking of taking some heavy duty plastic to the outside rail. Would this impact ...
7
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4answers
2k views

Furnace: pipe is leaking when switched to air-conditioning

I observed that when I enable air-conditioner, after awhile the valve (red one on the photo attached; correct me if it's called differently) starts leaking, the water drips from under the red "valve". ...
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1answer
30 views

Air conditioner register leaking

I had my roof repaired and they had to lift my AC unit. Now I have condensation leaking from a register. What caused this?
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2answers
131 views

Why is the paint around my ceiling air vent discolored?

What is this pattern of discoloration around my ceiling AC supply vent, and how can I stop it from happening again if I repaint? Background: In September 2016, I had an air conditioning system ...
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1answer
64 views

Honeywell T6 PRO Z-Wave Thermostat (model th6320zw2003) exhibits very erratic behavior after battery replacement

Background: My apartment complex installed Honeywell model th6320zw2003 thermostats in all units about six months or so ago, and it had been working well for all that time. The only issue was that ...
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4answers
109 views

AC air feels unnatural

I have a general question concerning air condition systems. Basically to me the air coming out of the AC unit doesn't feel natural. I've experienced different types of AC units, from small to quite ...
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1answer
35 views

AC Compressor was not turning off

With a split unit aircon unit the compressor and fan would keep running even when the unit inside was turned off. I figured out it was probably the relay sticking, so I replaced it on the control ...
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1answer
57 views

Furnace relay - old one says 18 LRA, replacement says 48 LRA - Does it matter?

forgive me if this is a newbie question. I am replacing a relay inside an electrical furnace/air handler. It is a relay model 90-293Q. The original one I have specifies it as "8 FLA, 18 LRA" but the ...
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2answers
150 views

Heat pump not working after rain

A couple weeks ago, I had a Goodman 3 ton heat pump split system put in. At 5pm hours today, I was outside near the heat pump and noticed that it was functioning properly. At about 6pm, there was a ...
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3answers
64 views

Powering a Window Air Conditioner — 10' 12/3 SJTW extension cord vs new outlet?

TL;DR: Is it fine to use 10' 12/3 extension cord or should I really have an electrician come out & install a new outlet? I recently installed 8,000 BTU window air conditioner (the LG LW8016ER). ...
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0answers
66 views

Why is my HVAC system not turning on the A/C compressor?

My AC stop cooling. Here's what I found. Inside blower is working, outside compressor/fan does not turn on. I manually push the contacts in the outside relay and the compressor and fan worked, used ...
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2answers
120 views

How to investigate a problem with blown 50 amp HVAC fuse without power?

My AC unit has the fan working but not the condenser and I found that one of the two 50 amp fuses was bad. Unfortunately after replacing it, I saw and heard a spark and the new fuse was blown ...
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2answers
40 views

Forced air furnace filter gets wet with water while A/C is ON

Noticed lately when it has been extremely hot, and my air conditioner is constantly turned on, that my furnace filter get soaked wet. Took it out , opened the furnace door to check, but there was no ...
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3answers
90 views

Portable AC not getting ride of condensate

I have a portable AC (LG lp1015wnr) which does not evaporate the condensate. It doesn't matter if it is in Dry or Cool mode. In both modes the water is drained from the drain pipe at the same rate. --...
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3answers
54 views

Fan is turning on air conditioner but no air movement

A few weeks ago I changed the outside unit's starting capacitor and that got the fan on that unit to rotate and the air conditioning on the enclosed back porch started working. Today I came home and ...
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4answers
59 views

What parameters affect the amount of btu required to cool a single room

Background Due to the reason I lack knowledge in air conditioning I asked a company that manufactures and sells a\cs to send a consultant to advise me on which air conditioner I should use in my room....
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1answer
1k views

What causes burn marks on the air handler in the attic?

What caused these burn marks? Phoenix Arizona suburb. House was construction complete about 6 months ago. The tape and insulating foam around the bigger tube was cut. I assume the AC tech that ...
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5answers
167 views

AC is dead, should we open the windows to release the heat and humidity?

Live in Central Texas where the temp is in the upper 90's, low 100's. My AC went so I had to put a single room AC unit for my Master bedroom and bath. Square footage for coverage is 600 sq. feet. Well,...
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1answer
47 views

Loud noise from outdoor unit several seconds after AC turns off

I haven't been able to find anyone online with quite this issue... I have a Carrier heat pump system, and through the winter it would often make that torpedo noise when heating the house (I later ...
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1answer
48 views

Add common wire to furnace

Trying to add common wire to furnace for smart thermostat. Looking at wiring diagram, it looks like common wire off transformer is blue, switches wire color to white (via wire cap), then back to blue (...
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2answers
80 views

Heating pool with excess AC heat

Unfortunately our new outdoor AC unit – a usual with a fan and aluminium heat exchanger – does not contain plugs to a water heat exchanger. That's a pity as the waste heat in summer could be used to ...
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1answer
35 views

Ac wires/dog help

My dog was messing around the ac unit outside. Two wires red and white that are still attached to the ac unit are now hanging and I do not know where they attach to, any one have an idea?
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1answer
101 views

My swamp cooler is leaving everything in the house black, why?

It's a brand new swamp cooler. I've called the landlord twice to fix it he said the belt fell off the first time then the second time he said there's nothing is wrong. It's the same problem from ...
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1answer
141 views

Carrier model furnace inducer motor turns on and off briefly

I have a carrier model furnace where the inducer motor will turn on for approximately 10 seconds then shut off for a minute or so. It only recently started doing this and it only does it my ...
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1answer
122 views

Return plenum too big for air handler?

I am currently in the process of changing the air handler and heat pump in my house. I am working with a friend's father who does HVAC for a living. He came over and looked at my HVAC system and gave ...
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0answers
46 views

Split unit Air Conditioner replace compressor single to three phase

I have a 3-ton split AC "single-phase compressor" was working perfectly until I moved it to another location, some oil spilled from the suction pipe during the transportation so when I installed it in ...
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4answers
67 views

Portable air vent

Can I vent a portable air conditioner thru a wall sleeve? Will it vent properly? I have no air conditioning and don't want to spend a ton on a in wall air conditioner..
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1answer
47 views

Window AC fan drip pan full

My AC started to blow out pretty lukewarm air recently, as well as make watery sounds while running. I realized the filter was dirty, and I cleaned the coils, replaced the filter and removed lots of ...
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0answers
24 views

A/C - Repeated Freon Leaks & Run Capacitators/Fan failures

My senior citizen father has a home warranty policy. Different contractors have worked on the A/C every year since 2011. He services it in the spring and changes the filter regularly, but we live in ...
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1answer
57 views

Is the PY4G HVAC unit compatible with Nest Thermostat?

I recently bought a Nest Thermostat and I've had nothing but trouble with it. The main symptom is the fan and the AC compressor won't run at the same time. Power only comes through the green wire, not ...
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1answer
120 views

How to fill large window gap for temporary air conditioner?

I have an air conditioner that looks similar to this... ...except mine doesn't have the flaps on the sides, leaving a large open gap between the air conditioner and the window frame. What's the best ...
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1answer
83 views

Why does my thermostat show code 'PF' after running the fan or A/C?

After running either just the central HVAC fan, or the central HVAC AC for just a few minutes, the Bryant thermostat (Model TSTATBBPB101, C Wire attached) screen momentarily shows "PF", and then goes ...
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2answers
33 views

Thermostat settings two hvac units older house

So I purchased a historic house built in 1920. The house has two HVAC units, one for the upper floor, one for the lower. Total sq ft 3300. I had been setting the upstairs thermostat at about 83 ...
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1answer
217 views

How long should I wait before turning on a window AC after moving it?

So my downstairs AC went, of course during this insane heat wave. Checked out Lowes and found a small room AC for 150$ so came up with a plan. My room AC is rated for a much bigger space so I bought ...
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0answers
14 views

How to apply drain cleaner to A/C drain

A while back I asked a question in a thread (The top A/C drain in my attic is leaking. Why?), and I wanted to know how to apply drain cleaner to the bottom drain on my A/C system. Could someone answer ...
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1answer
42 views

External Air Conditioner Condenser Capacitor replacement

I have a couple of questions about testing and replacing the capacitor on my home heat pump external condenser unit. 1. How can I reliably test the capacitor (what tools do I need?) 2. What safety ...
0
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1answer
58 views

Is it more efficient to turn my AC unit off periodically vs. keeping it on only while in the room?

I have an AC unit in my bedroom + workspace. I use its "auto" fan speed and "energy saver" mode (rather than "cool" or "fan only"). I'm wondering, which strategy is more energy efficient and by ...
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1answer
51 views

HVAC Air Blowback

Furnace/Blower: Rheem R92PA0851521MSA Dual Zone System (Honeywell TrueZONE HZ311) - Honeywell M847D1004 Actuators Age of system: less than 2 years old including ductwork Ive noticed that if Zone 1 ...

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