/r/HVAC
A subreddit for Heating, Ventilation, & Air Conditioning Technicians. If you are not a member of the trade, please post in our Q&A sub, r/hvacadvice.
If you are experiencing issues with your HVAC system PLEASE call a professional.
This subreddit's spam filter requires an account older than 24 hours and positive combined karma in order to participate. We will not manually approve posts that don't fit this criteria.
This is not a question and answer subreddit. Full stop. Any and all questions from outside the trade go in r/hvacadvice.
This is a subreddit for hvac professionals to discuss tips, tricks and information - including humor, memes and our favorite jobsite supervisors.
Message the mods with picture proof of industry involvement and your username for "Pro Flair"
Ads and offers/requests for work are prohibited.
Related Subreddits:
/r/HVACAdvice (for Homeowners or others looking for HVAC advice, quote reviews and general questions from outside the trade)
r/askanelectrician (for basic electrical questions)
r/ProHVACR (questions about owning or operating a HVAC company)
r/refrigeration (commercial refrigeration stuff)
r/airbalance (for Test, Adjust and Balance professionals)
r/kitchensuppression (for commercial range hood/restaurant fire suppression)
r/airconditioners (window units, wall shakers and all related equipment)
r/construction (for the lols and the hahas)
There's also the HVAC discord that seems like a pretty chill place to hang out - this is not operated by the r/hvac moderation crew. The mods are forever on-call here instead.
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/r/HVAC
I was looking to get into the union for an apprenticeship in NJ. I went to the hall today and they gave me the info on applying. They don’t accept applications until March 2025. What would you recommend doing until I can apply?
I see jobs posted for helpers or apprenticeships from shops in my area, but would prefer to go the union route. I don’t have any experience so I would be starting from the beginning as far as learning goes.
Sorry, if this has been asked a lot.
New WI freezer build
Been on this job for 2 weeks he always hangs out with me, shame he has a owner
Just asking for a friend
They not only give you flat head screws but the anchors are absolute trash as well
Hey everyone, was fired while on my probation period. Company I was with seemed too good to be true. Worked out of town for a week and on my last day (after hours) i drove the company van to my in-laws and used my per diem to buy us a pizza for dinner. Work found out, we had a meeting and I was terminated.
That same day I went out handing out resumes and talking to a few business. Talked to the owner of a semi-big residential/commercial company. Guy tolded me I was going to be his "boiler guy" and that i start next week doing a boiler install by myself.
I left thinking to myself that I bit more than I can chew. The owner told me to watch YouTube and to study before Monday's install.
I've helped install a couple boilers, am familiar with the main components, purging the air out of the system, and have done a few maintenance on them.
If you guys can share some common mistakes seen on combi installs please share
I love working on things, I used to work in diesel but decided I’m still young and I can try something else. I’ve always been mechanically inclined with a passion for understanding. I landed at a company that got me my EPA 1 and 2 working residential. It became less of repair work and more so selling systems. I parted ways with them and have been a service tech for almost a year now and I love fixing things but it keeps coming down to the point it’s just cheaper to replace. While I am an excellent in communication and feel like I’m good at sales, that is not why I got into this nor does it give me fulfillment making peanuts while the owner of the company buys their 3rd lake house. I’ve been thinking about moving to a city and just cutting out the option of doing residential, possibly union. It’s getting to the point the new guys get trained and I get thrown to the wolves because I’ve gotten this far without it. I think I’ve had bad experience with residential so I’m not sure if I should give up on it, or just try something different.
I want to start a career in this field , I don’t know how to go about it , which type of school to attend , where to start ,I’m tired of switching jobs … I want to acquire this skill , something no one can take away from me .. please enlighten a brother .. thank you .
Just had a quick question. Is anyone using an electric pump sprayer or some sort of electric pump for defrosting evaporators for coolers? If so does anyone have any recommendations thanks
Hello everyone,
I am currently going through my first semester of school at my local community college for HVAC. I am learning a lot and would like to know what you seasoned techs believe that I should focus on while in school. There is A LOT that we are trying to ingest in not enough time.
My goal is to become a strong tech and own my own business. I would like to work residential. What things should I focus on? What concepts are more important (is brazing theory as important as say, leak detection?) What sorts of things will I probably experience out in the field? General advice or tips?
Thanks in advance to anyone who takes the time to reply
Curious as to how you boys go about achieving a fast evac and recharge (primarily large commercial unit chillers,racks etc). Do you double vac pump for your evac, and are you charging at multiple ports?
This sub is once again becoming "my pussy hurts and i quit" "my boss hurt my feelings" "beeeep beee beeeppp meeep waaa"
If you want to complain, go over to /butthurt, no wonder you guys didnt make it in HVAC. Go get a receptionist job and fill out the HR form when someone looks at you funny.
Someone post some blown open 15ton compressors, roofers attaching their landyard to the gas line, or stolen RTU coil pics to get us back on track
I tried to ask the plumbers but they’re sensitive.
Installed a tankless at a buddies and it turns out he has a bit of a water hammer situation as anytime the cold water tap gets shut off quickly or the toilet flushes the inducer in the tankless comes on.
We install the same brand everywhere, including in the same subdivision he’s in and I’ve never had this issue. Local codes don’t require expansion tanks here.
Has anyone run into this? Did you solve it with an expansion tank or hammer arrestor? I’m trying to figure out what the better option is before I figure out one or the other doesn’t work.
Hi everyone, I am going to attempt red seal exam in upcoming months in Vancouver. It’s my humble request to everyone, please help me about study materials, any tips, anything would help me to clear my exam. I dont know what to study and from where to study. Thanks
I installed a split unit for a gym the other day and they want to run AC most of the time even in winter (lives in Canada btw). I know fan cycle switch controls head pressure and let it build up till it reaches desire pressure to fan kicks in. However I am wondering if the tenant ever wants to have heat on, would the heat pump still work with fan control switch installed? I was thinking about tapping it into the liquid line and run fan cycle switch wires in between contactor and fan, but then the pressure won't build up to 400 psig and that would never turn the outdoor fan on. Do I need to wire it to somewhere else?
Any other small hvac business owners experience this slow down, in the Fall? I’m a one man and a van business. My sons help on installs, but any other time, I’m on my own. Every year about this time, my phone stops ringing. Any suggestions how to keep food on the table, when the calls slow down? Thanks in advance.
Ignition module keeps popping fuse
I have an old Amana furnace I'm working on, keeps popping fuse. It has a brand new ignition module, and I just replace the transformer. Customer installed a new tstat before I got here. I've all the wiring is fine, and I've tried removing the tstat wires completely, and jumped r and w. It, still pops. Tested ignitor, also is good. What am I missing? The newodule didn't come with replacement harnesses. Could that be an issue?
I just left the call about an hour ago. They’ve already called to say it’s not working. It’s only gone from 83 to 76. ,,
This was a few years ago. Called out for a no heat and found this unit had a bad blower cap and blower motor was probably going to go out soon. I did check the heat exchanger with a boroscope and didn't see anything. This furnace had a tubular heat exchanger and had a hole towards the bottom end on the far left cell where I couldn't see with a camera. I replaced the blower cap to see everything run then saw this happen then ran it again to get it on camera lol. I pulled the blower and found a hole big enough to put my thumb through.
Searched everywhere online but cannot for the life of me find it anywhere