Questions tagged [cooling]

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AC not blowing cool air, Contractor said HVAC unit is perfectly fine and that it has to do with my smart thermostat (Ecobee 3)

So basically I changed out the filter on my HVAC unit (National Comfort Products, Model CPG41238-U23) and after I did that the AC stopped blowing out cold air. It was working completely fine until I ...
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39 views

Cold air blowing from return air vent

Cooling stopped working on my second floor zone, and cold air was blowing out of return air vent. I turned off the power to HVAC , it didn't work. When I turned off the thermostat of my second floor ...
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1answer
39 views

Sizing HVAC: 3 vs 2.5 ton AC, 60k vs 40k BTU furnace for 1200sqft?

I'm adding a HVAC system to my single-storey SFH (1200sqft in climate zone 2, San Jose, CA) and the contractor picked out the following system: Furnace: 60k BTU @ 80% Efficiency AC: 3 Ton @ 14 SEER ...
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2answers
42 views

Which AC Hard Start kit capacitor I should use?

My AC system is getting very old and I was wondering if I should add a Hard Start kit and with what spec? Here is my AC spec included below and the existing Dual Run Capacitor is 440volt and 40+5MFD.
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1answer
62 views

Adjusting Blower Speed for Central AC

I am trying to lower the fan speed on blower fan. It is currently set to factory default setting. My AC is 3 ton unit. Model no is 4A7A3036H1000NA. The fan settings on IFC are like TAP 1, 2, 3.... and ...
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1answer
63 views

Does leaving fridge doors open several minutes at a time lead to partial freezing of food?

I was hoping someone could help weigh in with a technical explanation here. We have a Whirlpool fridge that is only a few years old, and often notice that food near the back of it (and usually towards ...
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2answers
76 views

Is my brand new central air conditioner short cycling?

I just had a brand new air conditioner 5 ton condenser, coil and furnace installed in a 3,300sqft colonial in Connecticut. It’s 1am right now, 75 degrees outside with 97% humidity. I have my upstairs (...
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1answer
20 views

What would cause my line sets to equalize in cooling mode?

My heat pump line sets only get different temperatures briefly on startup in cooling mode. Then the hissing noise stops and they equalize and only the lower 1/4th of the a-coil gets cold and ...
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1answer
107 views

Why would turning off a fridge/freezer for 24 hours then turning it back on make it work again?

A family member's fridge freezer is now working well after being turned off for about 24 hours and then back on. Before, it was not cooling items, reading around 20 degrees Celsius. Now, after being ...
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3answers
88 views

Replace A/C Unit or add refrigerant?

I have a 20 year old A/C unit in my house here in Texas. Two weeks ago, the unit stopped cooling. A/C company couldn't come out until the next day and the house got pretty miserable. When the tech ...
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458 views

Samsung Fridge displaying wrong temperature

I have a Samsung RL42HGSW, which I had replaced a faulty thermistor 8 months ago. It worked fine until these days, until another problem appeared: it displays the wrong temperature in the LED panel, ...
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2answers
76 views

Shall I keep windows and blinds open during hot summer days? [closed]

On a summer day with at 36 degrees Celsius, in a room with no air conditioner but only a ceiling fan, and with windows facing north and east, which of the following can I do to make the room feel less ...
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1answer
38 views

Compressor melted hole in 5+ year old defrost drain pan, is compressor overheating a possible concern

It is quite possible that my defrost drain pan melting was just normal age/wear & tear but I wanted to double check that there is not possibly a larger issue with my compressor running too hot. ...
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2answers
48 views

Will replacing windows significantly reduce solar heat gain in summer?

A friend of mine is remodeling his 1980s house and was asking advice about keeping it cooler in the summer. The house currently has the original double pane windows, many of which have "popped&...
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48 views

Venting a hot garage, how much cooler can it get with an exhaust fan?

I life in Miami and the garage gets very hot in the summer and I am trying to cool it down so I can workout in it. The basics are: I'm looking at this product: iLiving - 10" Wall Mounted Exhaust ...
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1answer
28 views

What sort of device plugs in to this outlet?

I am looking to buy a window air conditioner. I would like the get the most powerful air conditioner my electrical system can support. I have this plug on my wall: I have never seen this plug before, ...
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2answers
69 views

can you build a house in a very hot climate with 600mm thick concrete interlocking blocks as walls?

Will thick concrete walls keep the house cooler in a very hot climate? Will have high ceilings to help with air flow.
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1answer
59 views

Evaporator Coil Cold, but Not Ice Cold

My temperature difference between my supplies and returns is only around 5 degrees F. I opened up my air handler to see if the evaporator coil was dirty, and it was clean -- but running the outside ...
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2answers
150 views

Is it possible to recharge a dehumidifier

I have an old Santa Fe dehumidifier capable of removing 110 pints of water per day. It has recently stopped working and the company diagnosed it over the phone as being low on R22. But they wouldn't ...
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7 views

Can a High Pressure lockout be caused by a bad unit or problems with heat rejection system?

I have a couple of Trane Axiom High Efficiency Console Water Source Heat Pumps which stop working with what seems to be a high pressure lockout. i.e. the compressor comes on, runs for a few seconds, ...
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1answer
38 views

16-year old Trane central AC one package unit is not cooling well?

My central AC is a 16-year old Trane one package unit on the roof top. However, it is not cooling very well. I brought contractors in and it seems that R22 freon is leaking. However, every contractor ...
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19 views

How to disable LG LT1216CER Thermistor

MY air conditioner's compressor keeps turning off before the desired temperature of the room is reached. I was told I could disable that feature by getting rid of the thermistor. Is this a safe ...
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1answer
46 views

HVAC blows fuse when cooling kicks on

I have Rheem HVAC system that is about 12-4 years old (its an R22 unit). Today it started blowing the fuse on the board when cooling kicks on. The tstat shows a message that says power failure, then ...
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0answers
637 views

Thermostat not getting power (Nest E74)

I replaced an old Honeywell thermostat about a month ago with a Nest thermostat. Friday Nest started displaying an E74 error. I have two furnaces and two outdoor units, one for upstairs and for ...
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2answers
48 views

Is moving a desk upstairs/downstairs for comfort twice a year a sign of poor insulation?

In a side-split on three levels, four including the basement, the heating and cooling unit is almost new (2 years), and the heating/cooling unit was only available at 35% more cubic feet capacity than ...
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1answer
330 views

Mr. Cool 24k mini split. Electrical install

I'm getting ready to install a mr. Cool 24k mini split. The Electrical in the instructions is pretty vague. Just want to double-check that I'm correct on how I'm going to install it. Inside my main ...
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2answers
52 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 ...
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1answer
96 views

Groundwater cooled heat exchanger - forced air

I have kind of a crazy idea I have been scheming - I live in Alaska, and have a private well - the groundwater here is very cold(40-45F) or so. The last couple of summers have been miserable hot up ...
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10 views

Bottom of fridge is freezing but top is not

I have a dual door refrigerator with the freezer on the bottom. The last few days, the bottom of the refrigerator, particularly the drawers for produce have been freezing, but the top shelves of the ...
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4answers
2k views

Heat dissipating materials for a wall that gets very hot?

The exterior wall adjoining one of our rooms gets a lot of sunlight in summer, and I suspect heats up the room a lot, as the exterior wall continues to radiate heat well after sunset during peak ...
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3answers
51 views

Will fiberglass insulation grow mold? (Florida)

Followup to this question one of the comments says that fiberglass can trap moisture and lead to mold/mildew. I did some research myself and found other sources saying the same. This worries me -- ...
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2answers
201 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 ...
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1answer
172 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
31 views

Whirlpool refrigerator (6 year old) stops cooling

My refrigerator stops cooling and I heard clicking and buzzing from the back of it. I then bought new start relay and capacitor and replaced the old ones. But the problem remains (clicking, buzzing, ...
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2answers
80 views

Do these swamp cooler pads need replacement or cleaned?

I know these pads are at least 4 summers old, but not sure how old exactly. As I was shutting the swamp cooler down for the winter, I saw that they seemed really dirty. The white material flakes of ...
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2answers
63 views

Refrigerator cools once but then doesn't start up again

We have a Whirlpool Side by Side refrigerator (GS6SHAXML00) that is about 15 years old and was working fine before a long-distance move. When we got to the new house and plugged it in, it seemed to ...
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2answers
163 views

How can I cool a small room without using more than 2kwh of energy per night?

I want cool a small room with something that uses less than 2kwh per night with more cooling effect than a simple fan. The room is on second ground with 2 windows and one door and is about 15m2. I ...
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7answers
27k views

Why does my house heat up, even when it's cool outside?

Summary The question pretty much says it all. It's probably a ridiculously easy one to answer. It's cool outside but I know that my house is heating up because my AC kicks on periodically. I've had ...
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3answers
66 views

Water/antifreeze radiator cooled work shop

An additional line of thought. Cooling radiators in summer? I found this having the same concept for cooling. I live in south louisiana, US where 95F is vary common turning tin boxes into a slow ...
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1answer
3k views

Hot Garage - Do Garage Door Vents Work?

My Garage gets hot in the summer! Outside temp might be 85 degrees Fahrenheit but in the garage it's over 110. If I leave the door open about 8 inches temperature equals out. Issues with leaving ...
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28 views

two separate systems controlled by one controller (wifi)

I have two separate systems with two separate thermostats, cooling on the second floor and heating on the first. Is there a way to have a "main" thermostat on the first floor and control the cooling ...
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0answers
24 views

domestic air condition needs restart for cool air

I have a new domestic air condition 9000btu in my room. I have the settings cool and 23 degree temperature and I noticed that when I turned it on for the first time of the day, it doesn't blow cool ...
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0answers
39 views

humidity vs cooling

Which is more efficient? The house is hot, but closed to keep humidity out. Should we open the doors to let cool air and humidity in or keep closed to keep humidity low, but temperature rises?
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2answers
836 views

Would adding ice to a ultrasonic humidifier help cooling in summer?

During summer it's way too hot for me to sleep well. I currently use a fan, but it's so hot that it's not enough. I had the idea of having a sonic humidifier in front of the fan as the fan would ...
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5answers
1k views

Can I cool my south facing wall by spraying it with water?

I've been researching options for cooling a south facing exterior wall on my house. One thing I've been thinking about is what if I just spray the wall with water and let it evaporate? The wall is ...
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3answers
588 views

Is my Outdoor Mini Fridge Doomed? Wont get cold

I'm having issues getting my Bull Mini Fridge to cool. It was not working when we bought the house, but we never really needed to use it. I have been trying to figure out why it doesn't cool. The ...
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1answer
614 views

Direct Wiring (bypass thermostat) of heatpump cooling

Last September my CT80 radiothermostat would not signal cooling despite the measured temperature exceeding the temperature setpoint. It would be nice if a relative could manually switch the cooling ...
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2answers
36 views

Heat proofing Rented Top floor , Direct sun-rays facing house in India

How to keep a rented house on Top floor (11th floor) sun and heat proof during extreme summer in India, If I close the windows it became like a furnace if I keep the windows open the house will heated ...
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1answer
77 views

How can I keep a hanging cloth hydrated?

As the summers are approaching, it kinda gets hot in my room. I make it cooler by dipping a bed-sheet in water and then hanging it on the curtain rod next to the window. This cools down the air that ...
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3answers
42 views

Premium for heatpump inverter technology

My understanding is that a variable speed compressor permits greater efficiency and reduce wear & tear. Assume application is in Florida, not NYC. Is there a range for the cost premium for such ...