LENNOX HEATER RANDOMLY TURNING ON
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- čas přidán 7. 08. 2019
- This was a service call where a Lennox heater randomly kept turning on. I found the cause to be a bad thermostat, I replaced the stat and zone sensor and checked all unit operations and found everything else to be working properly.
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Back in the 70's we were doing refrigeration on convenience stores. Employees were always playing with the T-stats and freezing up the evaps. So we would put the guards on the stats. We would come in next week for the same problem, so we would wire an additional T-stat to the system and hide it up in the false ceiling. Of course the floor level T-stat appeared functional, but no longer had control of the compressor. No more problems!
Back in the day I would leave the thermostats and install Accu-stats in the return air plenum.
You sir just answered my question of why there was a thermostat located in a drop ceiling of a convenience store I used to go to, apparently you weren't the only one who did this, they had flooding from the apartments above, so the drop ceiling was removed in many places mainly by the wall and I just happened to be waiting in line and notice there was a thermostat behind the counter as well as up above the drop ceiling lol
It saves so much time, when the customer is completely honest with you.
I don't even work in HVAC, I just find your videos very informative and entertaining! Keep up the great work
Ah the amazing sound of a fleet of compressors humming in harmony
When I first started in this business, I doubted what some customers told me. But after experience, I never doubt a customer. If they call, something is wrong. They may completely explain the issues wrong, but I've always found something wrong.
Asking stealth questions is smart investigating! ;) You have to find the clues in their 'native state'. You're a clever troubleshooter!!
Having been a long time bartender who later managed and now facility operations you nailed it with regard to asking questions.
But you did throw the cook under the bus!
Eh he didn't really throw him under the bus. The manager likely knew exactly what was going on but didn't want to acknowledge they knew because then they would be responsible. They should have a self closing door on there in the first place. Simple stuff for a manager.
No. Hard to find good cooks.
Use the same logic and strategy when dealing with customers. Makes life so much easier.
Glad you mentioned remote temp placement for the thermostat. I have found them behind icemakers, in a supply, hanging in ceiling, etc.. Had a restaurant complaining that their storage area would always be extremely hot, found the sensor mounted right next to walk in cooler door 😂
I dont know quite how i got these videos in my recommends, and I'm in IT. why am i binging these lol
I'm going to be blunt here. I learn more from you than the old technician I work with in the Casino. They mostly do guessing game and then calling an outside company if they cant figure it out. So thank you.
Thanks for watching bud
I am in BAS/EMS and had a customer complained his work area was so cold he couldn't work due to a 100% open VAV damper, OAT was mid 40's. The guy cursed me out saying our DDC was garbage and he fought against it being installed. First trip the guy was working in one of his five other buildings but I had access to the VAV just not the wall sensor. I set a meeting with him for a second trip, he no shows and says the VAV control is obviously broken just replace it. I did my whole I can't verify that if it isn't and I do you will still be charged if it isn't and I need a sign off. Email his boss, get a signed verification, 3rd trip I replaced it and same issue exist. I stopped talking to the maintenance guy and started directly speaking to his boss and make a meeting to get the door open. 4th trip I meet the boss there, she opens the door, and BOOM problem immediately fond. It was a small heater designed to be held up and plugged into a wall socket (no power cord, small little thing) about 2 1/2 feet below the wall sensor. Unplugged it, let the sensor cool off, retested the DDC and everything worked fine. Suggested we replace the sensor anyhow in case the heater damaged anything since it was a $12 part. He was let go sometime that month. Not sure if he was trying to cause problems or just an idiot. I think he did it on purpose.
Questions about the pitchers of iced-water to get unbiased answers without you leading them to an answer was beautifully clear. Very well done and explained.
Open up the manual? Generally when I show up, other techs have left manual out of the plastic zip lock, and it laying inside the unit, doors haven’t been put on correct, and manual is a soggy mess stuck together.
Or just gone with no sign of it having ever been there..
You're good Chris, you turned a nuisance heating call into a cooling call LOL
I was at a school doing an inspection. 3 units were in heat mode one was cooling. I went down and found an IPad charging station under that t-stat. Another place I was installing t-stats with sensors where the t-stats originally were. One guy there asks what I’m doing. He says “oh I can get by that”. I say please don’t. As I was setting up the stats the temperature was climbing like crazy. I went to that sensor. The guy had slid a filing cabinet under it and put a cup of coffee under it. He was laughing and I had to laugh as well. That was pretty good. Hey good video as usual.
Ran into a similar issue. Had a drop ceiling with open plenum return. Soon as mechanical cooling stopped, the 84 degree return air would blow warm air on them.
Bro, you're the troubleshooter's troubleshooter. You're awesome with your videos. Wish I could work with you. Keep up the superlative work!!
Thanks for the Lennox manual app info, great informational video, nicely done Chris great stuff as always
Great walk through. Thanks for all the information.
Sneaky guy! Lol that’s true though the answer is always no, but if you just observe operation you’ll usually get your answer! Good vid Chris!
I always learn a lot from your videos, thanks for posting.
Throw the cook under the bus! lol Great video, man. I'm new to the trade and love learning every day. That was one impressive hunk of metal!
Great points and great tips!! So so helpful TYVM God bless u please keep them coming
I’ve worked on a lot of these units with the old M1-6,7,8. I’ve seen the unit set up for free air cooling to be used at 60° with no regard to humidity. Now the unit will not run the compressors or maybe only 1 of 3 when in free cooling trying to use the outside air. Some issues I’ve found is the humidity if 100% and 60° makes it worse. Another scenario is by the time you get to the call OAT is above FAC set points and it’s fine. We deal with this on the east coast a lot. FAC is separate from the tempering. If it is setup for humidity those enthalapy sensors in the economizers go bad often, confusing unit. The newer M2 and M3 units are more user friendly to check all that. I heard a rumor from a Lennox rep the new board in development will have Bluetooth so we can use our tablet to control, adjust , and diagnose with our tablets.
Well Bob, it has been a year. what about that new board?, bluetooth???
@@Android_Warrior LOL i dont work for lennox. I hope they are still working on it thru this pandemic. Maybe the rep was lying. Sorry you been holding on to this for a year.
@@bobbassini3337 👏👏👏🤭🤭🤭
My industrial electricity teacher quit monday. I'm really bummed, he was gonna set me up with someone who was going to help me get the licence for the freon. I've been repairing the electrical side for years, wouldn't take much to get me fully up to speed, i understand pressures, Just need practice brazing :) haha. Its not really part of my class but seemed like a good skill to have under my belt
Great information as always! Great video!
Great video man awesome break down on that problem child.
Thank you for educating videos you are awesome 👏 👍🏻
Very thorough , mate , big picture indeed .
I'd love to rock that T shirt , if the shipping and customs wasn't such a bloody headache... Man that bums me out !😡
I like the 20 question approach. Sometimes you have to go around the barn to get the real answers.
At my warehouse I can't get the truth out of but 2 people out of 50. Its a shame and I have gotten used to it now. I take it as a challenge and see how long it takes me to figure out the problem and what happened. A lot of times its operator error. The excuse is always it was like that when I got it or it was like that last Monday I thought everyone already knew about it lol. Thx for the video.
Chris, being very observant throughout the years you and I thought think a lot alike I am bringing into that very issues with multiple customers and I have been very diplomatic about it and very observant. Even to where I have put the temperature recording devices in walkins and reaching and record it and have it on a flash drive. And the couple companies that I’ve been with have emailed them a copy of the recordings and the mapping of temperatures without them knowing about it that we were doing so.. and therefore, we can have very good “facts” to back up our intuitions and our gut instinct as well as our diagnostic capabilities,
Nice repair video 👍
I got to wonder why the HVAC industry is so behind the times, why cant you plug a usb cable from a laptop and test and monitor everthing from a laptop?
Actually the newer units do have the ability to do just that.
I do HVAC control in luxury homes and we have had that for years. Still doesn't tell you where the issues are though, just makes it easier to solve the problem.
"So I'm programming this thermostat and I'm going to show you guys the trickiest part. The trickiest part to setting these up is" (ads begin) :-)
add an Ad-blocker to your browser.
@@Android_Warrior I've always wondered if ad blockers affect the channel's compensation, any more than my habit of skipping ads as soon as possible does?
@@DaddyBeanDaddyBean : I have no problems with ad-blockers
@@DaddyBeanDaddyBean If you skip ads creator still gets some money, if you block ads, he gets no money
@@eatsleepdronerepeat2301 thank you.
7:56 - EPIC MOTOR AGAIN!!! But this time, it scared me when it started lol
Great video
great work!!
I got new knowledge on Lennox thanks
Good evening you done the best where others couldn't sauce the problem trying the board error to simple loose connection
Thank you I learn so much off these video!
Thanks for watching!! I will be going live on CZcams this evening 10/5/2020 @ 5:PM (pacific) to discuss my most recent uploads and answer questions from emails, CZcams comments and the livechat, Come on over and check it out czcams.com/video/-HE5LHWveM4/video.html
Another good info filled vid ...
Thought stat as well. Again, really like the new Honeywell pro 8000, very easy set up compared to the old pro 8000.
Good job!
Your right on how to ask question, cause if you ask what you really to know they feel like your putting the blame on that individual.
Love the art work I wish every one did this just great.
4:14 - EPIC MOTOR!!!
very helpful..and insightful.
thanks a lot!
this is great i learn alot from you!
Great job at troubleshooting ,everything was checked , The zone sensor should be relocated .
great video. I'm enjoying watching it ^_^
14:22 sounds like a GE90 aircraft engine at full takeoff load
Now that you mention it, I've been on aircraft that have a similar hum at takeoff throttle. Always thought it sounded unusual.
If I remember right, its because the tips of the fan blades go supersonic at high power settings
The mid roll started right as you're saying this is the trickiest most important part. I'm going to show you guys everything. Typical CZcams haha
12:42-13:25 if that actually works, you are godlike.
Well i am not godlike but the backdoor password works for sure, thanks for watching bud!
I didn't realize you're a psychologist on top of being a master tech. Most impressive.
Stat was 11 years old , just a technology update to start.
I tried to not start battles between the cooks n manager, lot of management would of chewed cook for the truth
Boy i've got to step my game up and get me a few more sensors. Still better than most techs around me. Some don't even know what a fecking micron gauge is. I had one feller that worked for us that loved to dump freon into systems without getting a superheat or subcooling at the minimum.
Please a follow up for the educated guess being correct. Thanks Chris
This video is on point
Thanks bud
Your logical approach is awesome, unfortunately, a lot of guys will just do whatever to get out of there as soon as possible leaving the system in a mess (somebody else's problem).
at 13:35 who installed that there? "FIRED", that is like lesson one, never put a t-stat/sensor within ventilation drafts or other human factored climate. forking ehhhh
On the pro8000 you can also get the date code in the equipment status setting so you don't have to take it off the wall.
Interesting scenerio.
Makes great sense
As always ,👍👍👍👍👍👍👍👍👍 !
Thanks
4:37 that`s a nice temperature to set
When I am showing one of the techs a unit like this, I always refer to the compressors and their refrigerant pathways as CIRCUITS..which is what Lennox calls them (Page 37 of the LGA book). The first two CIRCUITS comprise the FIRST STAGE, or Y1. The third CIRCUIT is the SECOND STAGE, or Y2. This way, we are all on the same page. We might say, "first compressor" or "second compressor," but "stages" always refers to the calls being received by the unit.
BTW...the weak link on the M1 style boards is the DIP switches. Finally, never leave the switch set to "recall." HTH.
maybe that zone sensor should be moved up a few feet or a protector around it.
No that is not the problem, they don't put the ice water there.
Good job I’m curious though with the fresh air mixture say it’s a 100° day say it was in Florida where the humidity is always sky high would that affect the cooling or would the 3 stages of cooling take care of the heat load inside the building
Great video! Is that an older unit? It is massive. That was a really goofy place for that zone temp sensor.
I have one of those older HONEYWELL VISION PRO 8000 that is REBADGED as a LENNOX COMFORTSENCE 5000.
York does that with the supply air temperature sensor Call for reheat when supply air goes below 50 degrees Fahrenheit
Love the trouble shooting!
First diagnosis tool are the people that are around the equipment everyday; be it refrigeration cooking equipment or hvac. They may not know the technical names or nomenclature but they know somethings different. Never found them wrong. Lazy, arrogant techs drive me insane.
This happened on a carrier 5 tons call for heat on summers day
I like the printer sits next to you
It isn’t on Auto like my thermostat? If it gets to the heat setting the heat pump will automatically reverse and go into heat mode.
are you a fan of the red link wireless sensors? I tend to use them as a less expensive way to average temp in a building that gets hot on one side and cold on the either.
👍👍👍
Your going to the cook fired!!
So. Is there an update? Did they get a reoccurence? Or did changing thermostat, installing and properly configuring zone sensors did it?
i'd suspect an wire rub through and vibration or rodent chew marks touching somewhere along the wiring.
watching more I started thinking there isn't an optional zone air sensor and board programmed wrong OR there is and someone placed it in a fridge/cooler or an air leak from one through wall into sensor?
the humidity readout, interesting, you think it would be disabled reading nothing, but maybe 50% is default readout. that seems like a basket of scrambled egg's :)
👍
I 'heard' last month, that Vision Pro stat is going away. :-(
Bummer
It's 8:00, I should be doing homework, and I just watched a guy fix an HVAC. I'm a little confused how I got here?
Edit: 8-o'clock
That RTU is excessively dirty. Full of dirt in electrical and burner compartment.
Detective!
11:05 - Did you mean to set cooling stages to 3 instead of 2?
No the unit controls the 3rd compressor
You have the same table as me
Doesn't it have 3 cooling stages? Or did I miss something? (when configuring t-stat)
It has three compressors but the third stage is controlled by the circuit board logic in the unit. So you only need a two stage thermostat. I will be going live on CZcams this evening 12/30/19 @5:PM (pacific time) to discuss my most recent uploads and answer questions from emails and the chat, come check it out if you can
czcams.com/video/XNnsDZUitZQ/video.html
Why do they need heat in the summer
Mr.Johnny boy
We use gas heat all summer here in central Florida for reheat, to try and get rid of humidity.
What tablet do you use
70°F that's like 21.1 °C. that's completely normal for me . what temp du you set your air-conditioning ????
Dunno , 21 seems a bit cold , especially for hot climates . If the clients come from outside where it's probably around 30-35 and they sit in a 21 degree ambient, that's too cold . Summer time , when it gets really hot , the setpoint should be around 23-24 degrees Celsius in my opinion.
We keep our home 75 during daytime, 74 at night. My Fiance would like it colder. When I lived alone in the past I would keep it around 76-77. Are women hotter than men? I guess so, in more ways than one!
@khalil’s Heat and air conditioner repair 80 in winter, wowza!
@khalil’s Heat and air conditioner repair Can't say I've been a hot house like that during the winter for years. Generally the winter setpoint is around 68-72 for most folks.
JUST USE A T87F THERMOSTAT!!!!
LOL
Why are there 6 thumbs down on this
Because they belong to the tiny wiener brigade.......
🤣
I stay away from honeywell thermostats. They are pieces of crap!
so, programmable T-stat with CR2032 battery for memory backup... the older models likely have them inside, supposedly non-changeable and could eat them in 3 years max.....
next if too many have the same default factory pass code anybody can alter them.....
I see all that as major security failures, same for hotels/motels, IoT devices and more. don't get me started into the automotive industry chock full of garbage.
I wont post all the pseudonyms I have for IoT ( internet of things) but they're being smashed and exploited hard core as well as other pure cruft junk unleashed upon we the public :)
yeah the smart devices that we are installing in our homes are kinda scary when you read about the lack of security they have in them. Most people think just because it says google or amazon on it its is safe but that is far from the truth.........
You should not be a manager if you're gonna act like a child when a tech asks you how you use whatever system hes trying to trouble shoot. That's actually pathetic and that manager has zero integrity. How can you be trusted to manage someone else's business when you can't answer such trivial questions honestly? It's not kindergarten, you're not going to be put in the corner...