Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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4
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2answers
664 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
240 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
56 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
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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
34 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
52 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
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1answer
93 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
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1answer
47 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
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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
157 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
124 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
39 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
4k 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
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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
847 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
159 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 ...
1
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0answers
95 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 ...
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0answers
40 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
58 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
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1answer
91 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
23 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". ...
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
317 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
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1answer
186 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
141 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
41 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
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1answer
140 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
307 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
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3answers
92 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
78 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
321 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
63 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 ...
0
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3answers
1k 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. --...
0
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3answers
176 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 ...
0
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4answers
70 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. ...
8
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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 ...
0
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5answers
921 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
53 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 ...
1
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1answer
55 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
84 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 ...
0
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1answer
39 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?
0
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1answer
317 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 ...
0
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1answer
249 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 ...
0
votes
1answer
219 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 ...
0
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0answers
52 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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