HVAC Systems Failing in Heat

“I just had a Mitsu HX12NL unit installed in my garage. I live in central NC. I got it mostly for the summer months (May to Sept) and maybe a couple months in the winter to add some warmth when I'm working in the garage. I've read many times that mini splits are meant to be run 24/7/365. I see can that logic if I live in South Florida but where I'm at, I don't really need to cool from March to May or heat from Oct to Dec. Should I turn the unit off completely during those months?”

“Greetings, I am looking for suggestions on a single room 400-500 sq feet AC unit. I am on my 3rd unit in 4 years. Each over was covered by warranty but I'm sure this one will not be. Each one failed exactly 1 year after installation due to pinhole leak in the coil at solder join. Iv hit my breaking point with Frigidaire products and how quickly each one has bit the dust almost 1 year apart. Model - Friedrich PDE12K3SGR3 Any help would be appreciated. submitted by /u/Grizzel898 [l”

“So I have two mini split units, senville brand both 12,000 btu. It’s 95 degrees right now and my house is 85 degrees upstairs and 80 degrees downstairs. I genuinely don’t know what to do. I’m not sure if they are underpowered in general. It’s about an 800 sqf house roughly. Not sure if I need to remove some of the skylights, or get another unit installed or both. The skylights act as a greenhouse, they aren’t glass they are a plastic panels of sorts. This is barndominium. I’m so close to like gi”

“our guest room gets freezing in the winter and bakes in the summer because the central air just doesnt reach it right. im trying to find a reliable window unit ac and heat combo that wont spike my electric bill too crazy or take forever to install. does anyone have a specific brand or model they actually trust for this kind of setup? thanks so much for any advice. submitted by /u/MilwarLecuyer [link] [comments]”

“Located in NYC suburbs. This last winter was extremely cold. My 5 unit / 2 condenser mini split system (Midea white label called Cooper Hunter) put in by the previous owner struggles on colder days. I can’t really get my house above 66° when the outside temp is < 25°, even with some new windows. The house is ~1500sq ft but has a basement with natural gas. Option 1) replace the mini splits with a better brand and electric only system. The lines currently run through the walls. I don’t want to”

“My landlord wants to put an HVAC system in my apartment. He was saying that there will be one unit in my living room to heat and cool the entire apartment. I just wanted to see what other people have experienced with this. In previous years, I’ve had a K-1 kerosene heater in my living room that didn’t heat the apartment very well and drove my electric bill up. I would use a window ac unit during the warmer months. The k-1 heater would be removed during the installation of the heat pump. Is a hea”

“Looking for some advice on what type of unit to install in our bedroom addition. It would be the primary heating/cooling for the room only, which is about ~350sq ft. So probably 9k or 12k BTU, preferable 110v. Hoping to find something reliable but mindful of the budget. It sounds like Mitsubishi, Daikin or Fujitsu are top tier but I can't even find pricing on them as a consumer. submitted by /u/cameronstrosity [link] [comments]”

“I had two identical AUX mini splits from Lowe’s installed in my house in 2023. They are 115v, 12000 btu units, one for upstairs and one for downstairs. Last January, both stopped working due ( I believe) to ice collecting in the bottom of the outside unit and stopping the fan. HVAC tech was able to get the downstairs unit working again, but could not revive the upstairs unit. He said it would be not be worth it to try and diagnose and fix the problem, and I should just replace the entire unit (”

“Hey all, We're in South Florida, and decided to get our 2 garages insulated and put in a minisplit system so we can use it as storage (was reaching >125 in the summers). I don't need them to be room temp, but getting them to <80F would be great. We reached out to a well reputed hvac installer, and he recommended one 24k btu system, one 12k btu system. I asked if we could do a 36k system with two heads instead, and he said he will do it, but strongly recommends two separate systems”

“I'm looking for advice on what is a rock solid very reliable heavy duty mini split heat pump. I currently have a Daikin and it's been by far the worst HVAC system I've ever had on my whole entire life. Every six months it seems to breakdown we've had valve failures had the circuit board replaced It's just been a disaster this thing is either a lemon or it's just a horrible product. I don't know. The air handlers are fine and I've never had any problem with them it”

“Location: in southern California, just had a week of 105° heat, 20 yr old hvac system finally died on us. Smallish home, single story with attic & venting newish doesnt need replacing Quotes: 3 diff companies, we have 3 ton unit, they all quoted around 25k give or take a few, but no drastic change in price [we paid for a quick repair to get the system working again but its absolutely on its last legs] Our idea: to use a direct seller website to buy a new system for just a couple grand, then”

“I am looking to put in a mini split system in our Florida room. I’ve investigated and a DIY is not feasible for me. So I got a quote and waiting on 2 others. Room is 18x22 all non insulated glass windows. Morning sun from the east and all afternoon until sunset from the west. Currently running an 11,000 btu portable unit, but it runs nonstop to keep it in the low to mid 80’s . I did call Mr cool and they sized me out at 18,000 btu which is the same as the quote I got. Wondering if I could/should”

“Hi all, In our single story house, we are having our beloved 15yr old ducted evap system removed to have a reverse cycle ducted AC installed. Our beloved flued gas heater also died in recent weeks and there are no parts available for it ... even though it was under warranty (thanks for that Bromic and Steibel Eltron). We are getting quotes on a new reverse cycle ducted AC installed system (Mitsubishi Electric “Mr Slim” Power Inverter). Specifics are still being worked out as this is new info for”

“Hi guys, I was wondering the best route to go involving a mini split system. I don’t make a lot of money and am trying to find an affordable option because my house doesn’t have central air or a furnace. I have two gas heaters that are seemingly very old and just want something for peace of mind my house won’t randomly burn down. I’ve looked into Daikin (don’t know if I can afford it), a Mr cool (I’ve heard bad things about longevity), and ACIQ and I don’t know a ton about that brand but it look”

“My unit is 20 years old currently had some components replaced last year. Currently propane unit. When the time comes thinking about electric hvac. Thoughts? Currently only heat with the propane as backup have a wood stove as my main source of heat in winter. No appliances are hooked up to the tank either. submitted by /u/OkMain4360 [link] [comments]”

“Remodeling 2400 sq ft 1970’s slab home and thinking of going to mini split rather than central a/c. Know very little about the technology. Can someone recommend a few top rated brands? Willing to spend a bit more for reliability, efficiency, longevity, etc. thanks in advance submitted by /u/surveygod696969 [link] [comments]”

“We are planning on buying a house(Nevada) but it only have mini splits in living room and masterbedroom as cooling. Other two bedrooms don't have any AC. All rooms have baseboard heating. Should we just add mini splits to the two bedrooms? How much would that cost? The mini splits they have in the house are Mitsubishi brand. If we convert it to central heat/air, how much would that cost for a 1450 sq ft house? Can someone also mention pros and cons of mini splits and baseboard heaters, pleas”

“As the title says. I need to replace my HVAC system and am looking for advice on what to go with. Location: North Texas, Dallas/Ft Worth area 2400sqft single story All electric, no gas service Current system is a 5 ton. inside part(air handler, heating elements, etc) are from 2000, yes, 26 years old. Outside part, was replaced in 2009. I would like to keep the total(parts and labor) under 15k and am curious what to expect when getting quotes. I thought heat pumps were the way to go now but the g”

“I know dual hose is always the way to go all things considered, but I am looking for advice on this specific situation. We recently moved into (renting) a 1,100 sqft upper unit duplex in a 1930's house. The existing HVAC cools the entire place super well except for one single room. We use it as an office/guest room and it's consistently 5-6 degrees warmer than the rest of the house. The room is about 130 sqft. The air coming out of the register in this room is as cold and strong as every”

“This is my first time ever having to replace HVAC, and my first time really looking at heat pumps. I just got a quote for a Carrier 37MURAQ heat pump setup with furnace, and it is coming out to the same price as a traditional Carrier condenser and furnace setup. I have never been around a heat pump in my life and was actually very confused when i first saw what they looked like. I am in northern Illinois, but my main concerns are more about reliability. Will the 37MURAQ have more problems or hav”

“Hey everyone! Hoping you all can give me some thoughts/feedback regarding installing a mini-split in our garage here in Florida. We live on the east coast close to the beach so definitely close to salt air as well. I’ve been working on our garage as my labor of love for about 4 years now. It’s your typical tight 2-car garage. I’ve done pretty much everything I wanted to do to it with the final thing being a mini-split. However, I’m questioning whether the end result will be worth it. I got a quo”

“I’m currently in a 500 sq ft apartment. Maybe 8-9ft ceilings and only the bedroom is not openly connected to the living room and kitchen. I have a huge heat intolerance and cannot stand the apartment temps being over 70. I currently use a 12000btu Frigidaire window ac (non-inverter) but it’s crapped out. I was looking at the inverter ones and narrowed it down to 3. • Frigidaire 14000btu inverter https://www.bestbuy.com/product/frigidaire-700-sq-ft-14000-btu-inverter-smart-window-air-conditioner-”

“Hey all, looking for a sanity check before I sign anything. This is for the living room and kitchen space in my townhouse ~900 sqft with the unit located in an attic. 3 quotes for 2-ton system replacement (Atlanta). one keeps my coil size, two shrink it. Which approach is right? Atlanta area, existing 2-ton Lennox split system: - Condenser: Lennox 13ACX-024-230-20, 2 ton, R-410A, 13 SEER - Furnace: Lennox ML180UH045P24A-53, 45,000 BTU input, 80% AFUE - Evap coil: Lennox C33-30A-2F-6, 2.5 ton So”

“I’m in the Midwest with a ranch home built in 2015 . The main floor is about 1,570 sq ft with a finished 1,080 sq ft basement (about 2,650 sq ft total conditioned space). The living room has approximately 20-foot vaulted ceilings . Current equipment: Furnace: Goodman GME950403BXAB 95% AFUE 40,000 BTU input (~38,400 BTU output) Outdoor AC: Goodman GSX160241FA 2-ton, 16 SEER I was also told my indoor evaporator coil is a 3-ton coil . Both were installed in 2014 . A few years after the house was bu”

“Our home is an older home in Iowa. It gets extremely hot during this time of year due to only having window/poetable ac units. Have been looking into mini splits. I’m mostly worried about the living room, dining room, and kitchen. We have a single doorway from the dining to kitchen and a French door connecting the dining room and living room. I don’t have a lot of options for wall placement, and was hoping to place it on the dining room wall. We also talked about adding another in the laundry ro”

“Looking for some advice on what makes the most sense financially and practically. House: Bay Area, CA ~2,200 sq ft Currently heat only (no central AC) Planning to stay in the house for another 3-4 years , but not certain beyond that. Existing furnace: Carrier 80k BTU, about 6 years old Single-stage with a constant-torque ECM blower Unfortunately, it appears the previous owner had it installed without permits, and the installation isn’t great (no filter cabinet, among a few other issues). I’ve re”

“12000 BTU mini split. Our sandwich station is between the ac and the grill/hood so at least it feels cool there”

“Living in a townhouse community that doesn’t have a lot of available space and have seen that a neighbor has what appears to be a hvac / central air conditioning unit inside their garage that has a vent / tube right above it. We are in California. Reading online it sounds like this goes against code in many area so curious what their setup might be? We have a pretty strict HOA so assuming they didn’t just go rogue but are there systems like this where you can put the unit in the corner of a gara”

“My neighbor has a mini split he will give me for free and we could really use one in our 3 car garage as we turned the extra bay into our office. I’m not sure of the garage sqft but online it says this mini split can handle up to 500sqft, I’m thinking that will not work for my garage size correct? And if it will then about how much is installation usually? Mini split model: MSZ-GS12NA submitted by /u/christawfer47 [link] [comments]”

“My Garage is about 900sq foot. The walls and cieling are insulated well, and it has insulated garage doors. What is a good value mini split brand? I plan on installing myself. I have an HVAC guy I can have come do the lineset hookup if that is the best plan. submitted by /u/Carstuff392 [link] [comments]”

“Hi. My girlfriend has a 1950 sq ft home that was built starting in 1840 in Central NY (Ithaca area). It's been added on to a couple of times over the years. The house is currently heated with baseboard electric heat. Her heating bill, as you can imagine, is quite high. I suggested why not get a heat pump with a AHU and run all new duct from the basement to the first floor, and use closets on the first floor to run duct to the 2nd floor areas. The return on investment would probably take seve”

“Hello, I get my air conditioner serviced yearly and have had few issues. During the recent hear wave where my AC unit has been running almost non-stop, it started making a weird rattling sound. It was almost non-stop for the last two days. The AC is working just fine and kept us cool, but it is obnoxiously loud. Today, I cleaned it using coil cleaner from the inside out and now the rattling seems less persistent but still there. Also, I have an enormous cotton wood tree in my yard so I'm con”

“The video above is taken once I turned the AC back on. It blows fine and then starts that noise. Signs point to the blower assembly, bad squirrel cage, or a seized motor. Before I order the expensive parts. Can anyone confirm what I’m actually dealing with? When I manually spin the cage it makes no metal scrape which makes me think its the motor. submitted by /u/HooveDawg [link] [comments]”

“I have two Diamonte Ultra Inverter++ 120v 12K BTU mini-splits with frustrating issues. Indoor unit filters clean, outdoor units clean/clear. Units are rated to use up to 12 AMPS but I never see that power draw. The units seems to cool normally in the morning, but day after 1PM they start to throttle back as the afternoon heat starts to saturate the house. You think the compressors would work HARDER as the temperature rises but the opposite happens. No matter the remote temp or fan speed settings”

“My dad told me to do this hack once every 2 or 3 months. The thing is I have 3 pipes up there where the furnace is so not sure which one I should pour down the vinegar. Any ideas? Also, is vinegar the best option? 50/50 with water? Or something else entirely? Thanks in advance! submitted by /u/Friendly_Childhood [link] [comments]”