Questions tagged [cooling]

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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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1 vote
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Why is this fan coil actuator missing a lever?

I live in a building where a lot of people have a hard time getting their units down to any acceptable temperature. We're all learning more about how fan coils work and one of the things that keeps ...
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1 vote
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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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Inexpensive ways to cool the house as a renter

I am renting a house with a few other people. The house is fairly old and the leasing company refuses to do any expensive renovation and it would be inconvenient to everybody living in the house ...
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13k views

'Wait' indicated on my Honeywell RTH7400 thermostat after 1 week vacation

New Homeowner (December) and I need help troubleshooting. Everything was peachy keen until I returned from a week vacation. A/C will not cool, but fan will turn on if I take it off of auto. "Wait" is ...
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2k views

AC capacitor testing with multimeter

When running through my check list to start the AC for the spring/summer I noticed the outdoor fan was not running, hence no cooling. I'm using a basic digital multimeter to test a capacitor with the ...
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1 vote
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101 views

How do I troubleshoot my central A/C?

It's 79 outside right now. It's been running for hours and it's remaining 79 inside. I'm in a brand new 2 story home in Monroe, OH. It has rained a lot recently but I just feel like it should be ...
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1 vote
1 answer
871 views

How can I consolidate different heating/cooling systems into a single system?

I have 3 different types of heating/cooling systems that I inherited. Hot water heat. This heats the whole house/garage via 3 zones. Zone 1: Kitchen/Livingroom Zone 2: Bedrooms/Bath Zone 3: Garage ...
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Wiring of a Vine TJ225 thermostat

How do i wire a TJ225 Vine thermostat? I have 2 red wires, a green, a white, and a blue wire. Red wires go to RH, and R, G goes to green, white to white, and the blue goes to Y on the old thermostat, ...
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omit a cooling stage to better align with unbalanced Heat Pump demands?

My 2002 house near Albany, NY has central heat but no AC. I've run several manual J calcs and yield 29k cooling and 53k heating. I'd like to use the heat pump for my primary heat and leave my ...
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32 views

From Honeywell to Google Nest... not cooling?

I recently changed my thermostat from an old Honeywell 7-day to a Google Nest. I'm an idiot cause I didn't take a photo before replacing it. now, I feel the air is not cool, just air/fan. The NEst is ...
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Can I connect a C wire to enable a furnace fan?

Hot weather is here and we don't have AC in our rental house, but our thermostat does have the fan option. After searching online, and seeing other solutions, I decided to look into our setup. All ...
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Thermostat swap

While switching out thermostat I noticed only two wires instead of more Rh W to be specific. The new thermostat has no Rh only R and Rc on Wich I selected R. Heat turns on now but doesn't turn off at ...
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Radiant Barrier: with or without Insulation?

Researching an attic radiant barrier for my old home has yielded two general classes of radiant barrier: simple films and then sandwiches of film/insulation/film. Is there really much benefit to ...
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nordyne hvac furnace will not fire up, tries 2-3 times, the grey resistors get real hot

nordyne furnace kept giving me communication code, replaced thermostat, ran fine for a week. get pressure switch codes so i replaced them. now it starts cycle and wont fire, if i leave the unit off ...
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Heat pump running on Heat and fan or Cool and fan

We just had heat pumps installed. I know that you cannot have the heat and the cool going at the same time. But can you have a head in fan mode and another head in heat or cool mode? Sorry for the ...
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Casement Windows: Install Thru Wall A/C Indoors & Exhaust with Ducting

A family member has a business in a century-old building that only has industrial casement, awning, and pivot windows. There's no central A/C & a mini-split can't be hung outside the building. The ...
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2017 Samsung Refrigerator RF28HMEDBSR Display Temperature Incorrect

My Samsung refrigerator is displaying the incorrect temperature to the actual temperature. I've used several corded thermometers and placed them in different areas of the refrigerator. The display ...
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How to improve cooling in a room/Cool a concrete wall?

Im on a 2nd floor room, it has big front windows and a small one on the side, I am using my computer/full setup on the corner of the room, where beside me is the window wall, but since im in the ...
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Looking for an alternative part for a refrigerator

I have an old Samsung 2-door fridge. It's model is RS20NRSV. The damper control window isn't working anymore and it seems like finding parts for this model is difficult. EDIT 1: From looking at a ...
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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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1k 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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6k 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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183 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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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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36 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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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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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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LG Bottom Freezer French Door Refrigerator not cooling

I have an LG Bottom Freezer French Door Refrigerator that is not cooling. I plug the refrigerator in after sitting for a few hours. Inside the refrigerator the temperature controls read 4 for both ...
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149 views

Reason to run a fridge compressor fan other than when compressor running

In regard to a small sailing yacht galley fridge, would there be any reason/benefit/need to run the compressor radiator fan any time outside of that which the compressor is running itself ? Ie just ...
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42 views

First cooling problem then buffle switch error

I have been waiting for my refrigerator do defrosting manually for the past 2 days. I have decided to do this because there was water leakage to the bottom section of the fridge and got an error ...
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Portable air conditioner question

I've picked a portable HVAC unit. It's a 2.6 KW 10,000 BTU model. The only way I will be able to vent it is by cutting a hole in one of the glass windows and and using the special fitting. I wanted to ...
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1 answer
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Can I vent room air to the outside?

The building interior gets hot during the day and stays hot during the evening when it is much cooler outside. It would be a really great option to simply vent the hot air outside instead of having to ...
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-1 votes
1 answer
1k 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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-2 votes
2 answers
4k views

What size start capacitor should I buy for my refrigerator compressor?

What size (in horsepower) 3-in-1 start capacitor should i buy for my fridge compressor? I have an LG LRSC26922TT from 2003. The compressor isnt staying on due to (i think the PTC hooked to the ...
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