Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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5
votes
1answer
911 views

Replaced Blower Motor, but A/C won't stay on unless power button is held down

My HVAC has an electric furnace blower motor for both heating and cooling. I called a repair guy out who explained that the capacitor was good, I just needed a new motor because it had gone out. I ...
0
votes
1answer
36 views

Heat Pump doesn't work in AC mode, but heat mode is fine

I have a heat pump for my house's heating and cooling. We had our first hot day of the year last week, so I switched it to cool mode (heretofore it had always been in heat mode). When in cool mode, ...
1
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1answer
45 views

Should I install my split AC outdoor unit further away so it's in the shade?

So i just got a 1.5TR split AC (LG LS-H18VNXD) and i have two options. Install the otudoor unit (ODU) just behind the indoor unit (IDU) on the outer wall, so piping distance would be minimum possible,...
0
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1answer
51 views

Best window AC for high humidity climate suitable for permanent mounting

I was thinking about having a carpenter mount a window air conditioner in a room. But, the problem I always have with window air conditioners units is that the humidity is too high where I live and ...
1
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0answers
26 views

Upstairs is getting frigid at night during cool nights

I have a dual zone Lennox system, and it cools well, but for the past few weeks it seems to run away at random cooling the upstairs to several degrees lower than requested. We have EcoBee thermostats ...
0
votes
1answer
29 views

How do I find whether I got the right AC?

Recently i bought AC (LG LS-Q18HNZA ) 2020 series. Somehow i feel i got cheated due to the below reasons. There is no printing "New 2020 series" on the indoor unit box. There is not stickers ...
0
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2answers
153 views

Reducing a 6 inch ac exhaust to 4 inch

I bought a portable ac for my garage. It comes with a 6 inch hose. I want to bore a hole thru the conderblock wall. But a 6in hole just seems too massive. I don’t want to destroy my house. I would ...
0
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2answers
53 views

Natural AC, Stream Powered heat exchange

I will keep this short and clear as I can. My home has a creek that runs through it about 20' from the side of the house. It is shaded and quite cool even in the summer heat. If I got say an ...
0
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0answers
14 views

Weak airflow after replacing furnace and add new A/C

I had Furnace HVAC before and I made a mistake not knowing what I had. We never had A/C. Recently I purchased this package from Costco: LENNOX ELITE SERIES AIR CONDITIONER SYSTEM XC13 LENNOX 80% 2-...
1
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2answers
169 views

110v outlet convert to disconnect?

I have a 110v outlet with a dedicated 20 amp breaker. My question is can I remove outlet and run the same 12/2 wire to the outside wall about 4 feet away from outlet and turn it into a disconnect box ...
0
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0answers
21 views

Trying to find an air conditioner unit to fit a 20x16 whole in the wall pre-existing wall unit stopped working

I have a wall air conditioner in my daughter's bedroom. It has stopped working and needs to be replaced. The problem is I cannot find any wall units online that have a 20" width. I'm hoping someone ...
1
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2answers
74 views

Can I use an adapter to plug a 230v air conditioner into a 120v outlet?

Can I use a 240v to 120v adapter to plug my 230v window air conditioner into a normal wall outlet without having loss of power to the unit or without potentially facing any other problems?
7
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10answers
6k views

Time to Replace Central AC?

Have a 2004, Rheem, Model #: RAMC-048JBZ; R-22 refrigerant. We live in Central Texas, very hot 5 months a year, we use the AC probably 7/8 months a year. Have had annual maintenance performed since ...
4
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2answers
667 views

Air conditioning: Frequent on-off of outdoor unit or stay on for long duration

I've a LG 1.5 tonne split AC in my room. As with many LG models, the ac comes with auto shut down feature of the outside unit as soon as the room temperature reaches the temp set in the AC. So this ...
7
votes
2answers
245 views

What is the incremental benefit of AC canned outdoor coil cleaner?

I understand that it is possible to simply clean the AC / Heatpump coils with a gentle water spray (cooling fins are delicate). I found a can of Web coil cleaner and emptied it into 3 condensors. I ...
1
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1answer
103 views

Just got quoted $5000 to service my HVAC system. Is this reasonable? [closed]

I have a 15 year-old York heat pump that gave out at some point during the winter (not sure exactly when as it's a dual-fuel system and nobody noticed until higher than normal gas bills started ...
0
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1answer
58 views

Hissing Sound After Filling AC Unit Refrigerant

I had a problem with with my AC window unit days ago. It kept doing a high deep sound while the sun is up. I had this same problem last year. Last year when I called the technician he told me the unit ...
1
vote
1answer
43 views

it is a good idea to turn on heating at the end of every air conditioning cycle at home for keeping filters clean against molds?

The question is: it is a good idea to turn on heating at the end of every air conditioning cycle at home for keeping filters clean against mold? Or is there any other way keeping filters clean due to ...
1
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1answer
71 views

How to calculate FPM as related to Residential HVAC air handler

I'm working with the formula that CFM = FPM X Cross sectional Area and I'm trying to calculate an accurate FPM through my air filter in my air handler. Originally, I was simply using the cross ...
1
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2answers
23 views

Thermostat wiring on a non programical white and rogers

Has anyone ever seen the common wire connected to the red wire??
1
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2answers
54 views

Replacing through-the-wall air conditoner

My through the wall air conditioner is no longer working. It is a Carrier GCA051B installed in 2001, with a sleeve. Assuming the sleeve is ok, what do I replace it with? It looks like the model ...
2
votes
1answer
102 views

Sound proofing bedroom doors, what to do about air flow?

We recently replaced all the carpet in our home with hard floors, dramatically increasing the amount of noise transmission between bedrooms and the hallway. I've been researching the best ways to ...
2
votes
1answer
70 views

What amp rating fuse should be used for the low-voltage side of the control board in my Goodman furnace?

I have a Goodman furnace (model GMH80803BNBC) (with separate Goodman AC condenser). The specs (PDF) are located online. The control board has stamped on it, next to the fuse (for the low-voltage (24V) ...
42
votes
12answers
6k views

Can I heat one room and cool another with an in-wall AC?

I work in a bakery. It gets warm in the summer, but not warm enough for bread to rise without extra heat. We have a 'proofer room' where the bread sits while the dough rises. The room is heated by two ...
1
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2answers
258 views

Should I COMPRESS fiberglass OR use foam insulation?

I have a room made of hollowed concrete blocks that I framed by mounting 2x4s, wide side against the wall. This gives me a 1.5in depth cavity to fill with insulation. Should I use an r19 fiberglass ...
0
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3answers
129 views

How can I raise the output temperature of my air conditioner for better comfort?

I think they put too much refrigerant because it's too cold at night; it is not comfortable. It's freezing cold even at 75 degrees. What can I do? This is a newly installed ac and furnace.
0
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1answer
41 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
6k 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 ...
2
votes
1answer
29 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 ...
1
vote
2answers
87 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 ...
1
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1answer
1k 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, ...
2
votes
1answer
180 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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0answers
149 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 ...
0
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0answers
18 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 ...
0
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0answers
41 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 ...
1
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2answers
59 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 ...
0
votes
1answer
107 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 ...
0
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0answers
24 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
votes
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". ...
1
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1answer
32 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?
0
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2answers
390 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 ...
1
vote
1answer
243 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 ...
1
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4answers
143 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 ...
0
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1answer
43 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 ...
0
votes
1answer
159 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 ...
0
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2answers
357 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 ...
0
votes
3answers
94 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). ...
1
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0answers
79 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 ...
3
votes
2answers
376 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 ...
0
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2answers
76 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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