Questions tagged [air-conditioning]

For general questions regarding cooling your home.

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3answers
1k views

Are window air conditioner support brackets designed to support a window air conditioner by itself?

I have this air conditioner that is designed to be used with vertical sliding windows. The problem is that I have a horizontal sliding window. I understand that the air conditioner I have is designed ...
3
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2answers
265 views

A/C unit cycles on and off during cooling phase

My outside compressor / condenser is cycling on and off, even though the thermostat is calling for A/C. The blower in the house still runs, and the thermostat is working properly. (I opened up the ...
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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
62 views

Fan comes on but the air conditioner does not

During hot days when the air conditioner is on a lot it comes to a point in the evening when the air conditioner shuts down and the fan (from furnace) stays on. This will go on all night as the house ...
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1answer
21 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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1answer
53 views

Hook up new thermostat

Top brown picture is my old thermostat white is the new one , do I have it wired correct? On out side unit we have replaced motor, fuses, compassator ,cc contactor ,relay . We have a heat pump. But ...
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2answers
1k views

Should my a/c have some sort of a drip pan (photo)

I've got water (condensation) dripping from this "radiator" in my a/c. It's slanted so MOST of the condensation drips along the radiator and into a drip pan. I'm wondering if I just need to clean it ...
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6answers
29k 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
126 views

I have a Janitrol Model A42-15 and I wanti to replace the outside unit, but it takes the dreaded R22

Can you use the new refrigerant with the existing inside unit? If so, what would be units that are compatible with my existing one? My outside unit is a 3.5 ton unit, but I am going to need a 4 ton ...
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2answers
3k views

Is the transformer bad on my Central Air Conditioner?

Need some help diagnosing a problem. My very old central AC unit isn't working. It's just AC and about a year ago I connected a C-Wire to the air handler when swapping the thermostat for a wifi ...
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1answer
59 views

Why compressor of my Air Conditioner is not working?

Compressor of my AC is not working . My AC is Window type , in window type AC compressor starts if the room become hot then it stops when the room become cold . But today compressor of AC was not ...
2
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1answer
333 views

AC Blower Motor not working during night

The blower motor in the furnace stops working at night most of the time when the AC should be on. The blower motor (in the furnace) might run for one or two cycles at the beginning of the night but ...
0
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1answer
37 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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2answers
2k 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
68 views

Attic Temperature Affected by Insulation

I recently moved into the attic and converted it into my bedroom, There was insulation on the floor but none on the walls which made it uncomfortable to live in considering its the summer. I got a ...
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1answer
64 views

What could be going on with my HVAC?

I have a Carrier Infinity system - full system (heating and air conditioning) newly installed a little over a year ago (southern Ontario, Canada). I have programmed the system for continuous fan ...
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3answers
30k views

Should I add a return air vent in a refinished basement?

We are refinishing our basement, and are nearing competition. The walls are drywalled, and the ceiling is dropped. There will be about 500 sq ft of finished space, including a full bathroom, and ...
0
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1answer
109 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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0answers
25 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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1answer
1k views

Venting AC to Bathroom extractor fan

Simple question: I live in the UK, so AC is still a bit of a novelty, but, every year, I toy with the idea, and dismiss it due to lack of knowledge I live in an apartment of approx 7 rooms (2 beds, 1 ...
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1answer
86 views

Air conditioning thermostat wiring help

Really need some help. I was working on the wiring of my home air conditioning and managed to mess up the low voltage wiring. I was installing a wifi thermostat and opened the panel to add a blue ...
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0answers
14 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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1answer
110 views

Adding New Breaker / Subpanel

I am installing a 240v ductless mini split. My breaker box is full, and I have a seperate ( hot water ) breaker in its own box on its own meter. I see two ways I can approach the situation: 1) Add a ...
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0answers
36 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
98 views

Air Conditioning and blower problems

Ok, the blower unit will run on heat and fan on. However when I switch to auto and cool the blower unit doesn't run. When I have the blower in the "on" position it will run until I switch the ...
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1answer
358 views

Sealing middle of sliding window with portable air conditioner installed

In my bedroom I have a one hose portable AC unit, because my only bedroom window is a sliding window. Currently, I set up the window kit in the day and take it out before bed. The reason for this is ...
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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 ...
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2answers
32 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 ...
2
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1answer
776 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 ...
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2answers
215 views

How can I temporarily attach anti-bird spikes to a window air conditioner?

I'm trying to stick on anti-pigeon spikes on top of my window air conditioner and want a non-permanent solution that I can take off when I put it into storage. Is there something I can use that's ...
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2answers
239 views

Condensate drain does not drain properly

My air handler is located in the garage and for some reason it will not drain properly until the fan shuts off.Unfortunately I cannot figure out how to add a photo but it has a vent pipe coming out of ...
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1answer
48 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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4answers
4k views

Will adding a cool air return in the basement help with summer AC power usage?

Pretty much the title. I have a full basement. Part of it is unfinished and has the water heater, furnace, and washer / dryer. The other part (roughly 1/2 of the total space) is partially finished. It ...
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1answer
146 views

Blue cable in 220v air conditioner plug & cord?

I'm looking to replace the plug on a window air conditioner unit that uses a 6-20 240v plug. However, in addition to the cord having two hots and ground, there's a small blue cable that I'm not sure ...
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2answers
59 views

Circuit board fuse for the air handler

where in the furnace does it say if it uses a 3 amp or 5 amp fuse for the circuit board? Or how would I know which is correct
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1answer
283 views

Better option to place tubes from indoor and outdoor units in AC

Currently AC(split ac) is positioned as shown in the image: But now i would like to move it to another place, here i cannot change position of outdoor unit. Changing AC indoor unit position will ...
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". ...
0
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1answer
3k views

Is a portable air conditioner supposed to make a buzzing/rattling noise?

I have a brand new Olympia Splendid Ellisse HP portable heat pump/air conditioner and it makes a vibrating buzzing noise when it is on doing the cooling. I understand there should be some compressor ...
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1answer
2k views

Extend dryer termination away from condensing unit

How can I extend my dryer's exhaust vent away from my A.C. condensing unit using the existing outlet? It currently looks like the picture below. I don't know if the vent going through the wall is ...
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1answer
29 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

Air conditioner problems

My A/C is having problems for the last few days. My outside unit which the main motor is always cycling off and on every 3-5 minutes and the room temperature is not improving. This happens even when ...
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2answers
51 views

How to clean a domestic air conditioner

How do I clean the inside of a domestic air conditioner? Can I spray water to the coil (after the filters are off) or water will make coil to get rust?
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1answer
58 views

Info concerning an old AC unit

I have a Panasonic cu-g125ke AC unit which trips the circuit breaker 30 seconds after its's powered on. I have searched the manuals for what to do but it says: contact a dealer in your area. The ...
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1answer
56 views

Maximum weight window air condition without supports?

For the average old window what is the maximum weight air condition you should have installed without any support brackets beside screwing in the window frame from the inside? For example up to 50 ...
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1answer
56 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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1answer
71 views

How do I solve the allergic reaction (red burning eyes) from the mitsubishi unit in my bedroom?

I have a twelve year old Mitsubishi unit in my bedroom. I also have allergic reactions to pollen, mold, etc. This year, for the first time, I wake up in the morning with red, burning eyes. My ...
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1answer
58 views

Can a roof A/C be installed on a concrete slab on the floor without being on a mounting?

An A/C company came out and replaced my A/C with a new unit a few years ago. I've had A LOT of problems with it freezing since then. I noticed a lot of mold on the bottom of the unit itself and it ...
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1answer
70 views

Line to AC dripping at the furnace

My line from my exterior AC unit is dripping at the furnace. The dripping over time has caused rusting and we've had to replace the control board under it. It appears the root cause of the problem ...
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2answers
107 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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2answers
65 views

How to clean a reusable HVAC filter

My HVAC system is around 15 years old and I have a washable air filter. The tech who looked at it last told me to clean the filter out and run water through it once a month. He told me to let the ...