You are a great instructor. I have no prior knowledge of how to troubleshoot a furnace, now I can see the line of thinking. You have helped me more than you will ever know. Thank you for sharing with us.

Wes, thank you so much for this video. After my furnace was malfunctioning I watch several video and none pointed to a problem that you did, which was to check the air tube at the pre blower motor for cracks. As it turns out, that's exactly what was wrong with my heater. You are THE MAN!!!

I have been watching a lot of KZfaq videos in trying to diagnose what is going on with my furnace. Yours is by far the best! Your totally open furnace trainer is excellent for seeing what is going on. Thank you!!

Thank you for teaching,very educational and very easy to understand,

this is the best video i have ever seen about hvac. i wish this guy was my teacher. man he is really good clear. i like the way how he go step by step in explaining the sequence of operation.

excellent review! thanks for your tips. here is one for all. this was an older amana furnace. no ignition, draft inducer comes on no ignition glow coil. being a newbee finally found that the inducer motor lost the impeller on the other side of the motors shaft. motor comes complete kit for replacement. keep up the videos.

not everything is gravy new. in the field is your best instruction. I'm thankful of these videos . The computer has given me great knowledge if you know where to look and talk with others . Never the same problem. Switching out parts is not troubleshooting its guessing . You gotta be quick and right. In conversation with the customer.

Thanks Wes I was going crazy trying to figure out why the older furnace I was bench testing before installing kept short cycling (Short Flame). I replaced the flame sensor as it looked somewhat corroded but to know avail. All other cycles sequenced properly. At the end of this video you mentioned reverse polarity, that is when I realized that I did not check the polarity on the 110 plug end I had installed. I reversed the wiring on the plug and BINGO working furnace. Thanks a bunch! This was a very helpful video!!

video gives owner and inspector a good understanding of furnace operation. Thanks.

I learned a lot of this from word of advice channel. I got excited when I was able to give an answer to the problem before the instructor did. Haha.

Great video I just used this to troubleshoot and fix my furnace after I woke up to a freezing cold house. Thank you great tutorial

I had no idea that this video still was around. Please understand I did this for my Masters degree for a college professor and didn't realize people where using it. I guess due to my position I will post more how to videos to teach. If anyone has any suggestion on what they might want to see let me know and I will do the best I can to answer or post.

Its ok, your doing better teaching LIVE than those other 46 people who NEVER make mistakes! What I really like about this career field is the different jobs we get to do! What I HATE is all the arrogant assholes who think they are better than everybody else and look down on those of us learning it, because they have been doing this since Moses parted the red sea and probably helped build the &^%$ pyramids! Keep up the great work coach!

Great video very informative. Now i understand the sequence and i can diagnose easily the problem with my furnace. Thank you!

Is this the only training video you've done? really found it to be very informative. Thank you.

thank you for your video I am new on this, all my life I was installer only and now am trying to do troubleshooting this video is really helpful .

thank you for this tutorial sir, i learned a lot pls. make more tutorial..

awesome job thank you

Wished that I saw this video first. Now I am better prepared to diagnosed future problems. Thank you so much

This was a really great video. Furnaces are not so mysterious anymore!

Thank you 🙏 god bless you

Great video Wes. In regards to Long Denis.. i would give Trane a call but in lieu of that if you knew the sequence of operation the glow plug or hot surface ignitor should stay on long enough to light the burners and flame rectification verified before going out. If it is not happening or happening intermittently then i suggest you isolate it and ohm it out then compare what you are getting to the manufacturers specification. It the ohming is correct then continue back to the IFC board and verify what signal you should be getting from the board ie time or current or both. Hope this helps. Others feel free to add input

Video is very good. As far as quality...it’s a you tube video...not a movie.

Thanks a lot a lot for posting this! I fixed my furnace by pressing the reset buttons! 👍😊

My Heater/AC is a package unit - it calls for heat from the thermostat the blower fan comes on after that it blows for about a minute I hear a few “pops” maybe sparks then shuts off in lockout mode. Based on the sequence of operation I believe it’s the pressure switch. However, I do hear 2 separate clicks during this process. Which I kind of think it’s the pressure switch. I do not hear the ignition switch spark. Basically, the burners don’t go on as I’ve explained. From this video I can conclude it’s the pressure switch (I do hear 2 separate clicks though). What do I check from this point on?

This is a great video, one of the best I've seen on youtube. Thank you for uploading it this is very helpful for all upcoming tech like myself.

thanks for taking time to make an educational video , it was very helpful , but the guy doing the camera needs to get close enough and stay there so we can hear , or give the instructor a microphone

Very good instruction. This has helped me .

Thanks a lot that explanation was great,God bless you Teacher

Outstanding! Thank you very much!

You also have 24 volt that sent through the limit switches and rollout switches before the sequence of operation will take place.

Thank you Wes that was great and you also do very well with your presentation speaking on video!!!!

excellent tutorial clear and to the point

I have a Haier gas furnace that is giving a 2-blink code. The furnace has four blink codes according to the inside of the furnace cover. The codes are:: 1: Burner Limit Circuit Open; 2: Primary Limit Switch Circuit Open; 3: Pressure Switch Open; 4: No Circulation Airflow Lockout. My problem is that I am getting a 2-blink code, which is Primary Limit Switch. I replaced the Primary Limit Switch with an exact replacement part but that did not fix the problem. I have not yet checked the sequence of operation as shown in this video but I will in the morning. In the meantime i would appreciate any suggestions. Thank you.

Great explanation .......excellent

You are a great teacher. Very clear and also points to the problems.its easy to learn from you. Do you have a website to learn more on furnace

This is a helpful video, but you need to be more specific on the exact function of the various control switches. Are they normally open or closed and exactly what causes them to change state? It would also be helpful if you would use both the English word and and the commonly used term by people in the field. For example IFC: What is it? I would call it the mother board, but I believe IFC indicates something like Integrated Furnace Control. The problem I have with my Goodman furnace is the documentation is not well done. For example in the documentation there is no indication in which position a Dip Switch is on or off. I think for the average homeowner "twining" is the least of their worries. Most residences probably only have a single furnace. Finally I'm not a fan of "blink codes." Home alarm systems have had English language displays for quite some time. So does my CPAP machine. (Continuous Positive Airway Pressure). used as remedy for Sleep Apnea. It seems that there should at a minimum be a plug for an accessory tablet style display that would point directly to the problem, and perhaps even including a help guide. This display could also include information such as Run Times in Various Stages. Dip settings. BTU consumption. Duct Air Temperatures. Filter Change Status, and cumulative electrical consumption. Perhaps a Carbon monoxide sensor and and natural gas leak detector could be added and so on. The so called modern high efficiency furnace is still in many ways operating in the dark ages. A blink code is the ultimate "idiot light."

Very good video

very good demonstration!

Very nice for us new guys just learning. Thanks

Thanks for your video wish you were my instructor when I went to school

how long is the blower supposed to stay on after reaching the preset temperature ?

Good information, just wish the camera was held steadier say on tripod with camera zoom used and steady level audio coming from the teacher/speaker by use of a clip-on lapel mic.

Simple and understandable good vid

very good video

great troubleshoot video! do you cover hot water gas fired boilers?

Great Video! exellent! Can't see clear the control board therminals and wires you interchange in the low voltage circuit. Hey Master could explain Thank You! have a good day! Where is Your school located

Really knowledgeable technician and nice demo furnace, but you need a good camera man and a sounds production team for your video.

Hi Wes , very good video. I keep burning transformers , only primary side when the shorts were found at the condenser low voltage contactor coil. Can you please explain this. Thanks.

Wes, At the end of your video you showed a similar sequence as the flame sensor switch. Meaning the gas ignited but went out 5 to 10 seconds later. I have replace and cleaned my flame sensor but the flame goes out (gas turns off) after several seconds. Assuming the flame sensor is working what could be the issue?

Great video

Awesome video ....thanks.

Thank you so much I couldn't find out what problem was and I was able to fix it

Exactly what polarity are you reversing? The hot and neutral from the load distribution center to the furnace or something else? (white and black power supply wires reversed?) Also what is your position on safety grounding? Should the safety ground (earth ground) return only to the load center, or is it acceptable to safety ground to an indoor copper cold water pipe?

Great video. Thank you. for my Trane xe 90, everything seem to work up to the point where the glow plug comes on. It stays on for about 3 to 4 sec and start to die off thats when you hear a click for gas, i guess, to come on and light the burners. I'm not sure if the glow plug is not staying on long enough or if the gas is not coming on early enough. it's a hit or miss. sometimes it lights it sometimes it doesnt.ANY IDEAS PLEASE. (new gas valve, new control board, new blower motor, new capacitor. glow igniter looks good and get pretty brite.

great video!! thanks

Please make more videos about heat pumps troubleshooting

@ 7:23 #2 condensate could fill the pressure switch line. The hose should be short and angled up.

HELP! I need advice on a furnace problem. I have a 10 year old Amana nat gas furnace in a house. The last 3 years every autumn it is reluctant to flame but then works fine for the rest of the winter, but this year it is really bad. It tries to start; the starter glows, and I swear I can hear and feel the gas valve solenoid open but no flame, usually, maybe one out of 10 times it starts, but then only runs for about 4 minutes then stops. I replaced the gas valve and the circuit board but still the same. I cleaned the flame sensor, no help. Is it possible that the gas valve is sticking closed? (GEMINI 36G54 type 238) I am out of options and about to call the service man. thanks, john in Michigan.

Great video please cloud you do more

My furnace seems to be working fine but do two or tree cycles to get the temperature what the thermostat says ? Is blinking lights Any recommendations

I have a furnace that does not turn on. Does not blow hot air and does not have inducer motor turn on. What can be the issue? The control board does not have any lights on either...

Thanks for an excellent video. Very informative!

You never said anything about one blinking code. (Ignition failure) causes?

I have downloaded this video it work for me

Good clip learned a lot.

Awesome job thank you

You need to do something about the sound level of your video. When you move in for a closeup the sound is clear, but when you move out (or pull back) the sound is very hard to hear.

Thank you just saved myself a couple hundred bucks due to a faulty pressure switch

Some times furnace runs good then once while it does not . calls for heat motor runs no igniter glow plug does not light up . does that mean I need pressure switch .

Appears to be good video but audio is barely audible. May be its just my computer but I had volume turned all the way up.

why didn't you tell us what caused the last scenario ? i was waiting to hear what caused a flame out that wasn't the flame sensor.. plus the most import parts , of what you were doing with the wires when it tripped wasn't captured by the camera guy, for SOME reason he stood back away from it. i didnt learn anything on this

thanks for making the video

hello My blower fan stays on, new inducer does not come, and pilot never light what would cause the blower fan to stay running?

excellent video where it the school?

My basement so warm. I went over to furnace as it was running and a lot of warm heat is blowing out from back of furnace. a as if it was a vent. Is this normal? for years my basement was cool. I have a gas Furnace.

Hey Wes what if the main fan won't come on but the furnace does? Is there a way of telling if it is a bad fan motor, fuze etc?

Does the induce draft motor only run on heat? Is it supposed to kick on on cool?

Good job Wes. but the last part i dont get it actually,camera man ran away from u dude

my furnace sequence as follows - thermostat calls for heat- igniter glows- gas ignites and there is visible flame- after so many seconds fan starts ( same fan that turns when a/c mode is on ) however the air coming through vents is not warm. is there another fan? its like the heat is trapped in the furnace and not being drawn through the ductwork. i dont have the unit opened up so i am describing what is visible to me through the glass window . the capacitor that was mounted on the outside of fan looked defected so i replaced it but heat from flame is not coming through vents- it blows cold. please tell me what i should do next

Wes, Great video! We're in Reno and got a kick out of seeing this from TMCC. We have a 12 year old Rheem Criterion RPGJ that's going thru the sequence normally but the flame shuts off after about 5-6 mins before reaching target temp and we get a 3 blink code. (Blower keeps running then shuts off as normal) . Furnace will come back on after about 2 mins and go thru same sequence again. It will do it 3 times to go up 3 degrees to target temp. We change the filter every month (Rheem #7 previous owner had washable but rarely ran it. Inspection a year ago revealed no issues.) All vents are open. Cleaned flame sensor and tried the reset on the high limit switches, didn't seem to do anything though. (Is it the little red buttons in between the 2 connectors?) We ran the furnace with the doors off to test it, and to watch the sequence and for a possible error code. It ran like a champ for 25 mins to target temp 5 degrees up. Strong like bull! No error code. No cycling. Everything seemed to be running fine. Then, this morning, the first time the tstat calls for heat it does the same 5-6 mins burners stay on, then burners shut off and 3 blink code, blower keeps running then shuts off, stays off for about 2 mins and then sequence starts up again. The only change is the doors are on the furnace. ???

thanks wes! awesome info! is it the same for a 90, the school i went to does not teach like yours... and tha'ts a shame.

Hi Wes- great video! I have a GUA Series Gas Furnace (model GUA080A012AIN) that gets through the ignition sequence all the way up to flame. The Fan/Limit switch (Honeywell) eventually cuts off flame so the fan/blower never kicks on to heat the house. This happens often but not every attempt so it's been pretty confusing- would you be able to steer me in the right direction?

hey wes. mine is a rheem silhouette II. the sequence of events is as follows: 1. call for heat. 2. induction draft motor. 3. pressure switch clicks. 4. electric igniter ignites. 5. no burners light. indoor blower motor starts. 6. system shuts down and repeats itself 2 more times. then I get the blink code of one.so this system fails after the igniter with no gas or burners. what would you suggest my steps would be, and what is the more likely culprits causing this?thanks for your time.respectfully, Richard Carson

I thought if you were able to spin the fan blade inside inducer motor that it was good ?

watch your your video. Have one question? when I set my thermostat say to 73. My furnace doesn't shut off. Do I need to replace thermostat or is that the fan timer

Very helpful..

So what could be the problem if the unit comes on for about 4 or 5 minutes and then shuts off?

I need help, furnace works fine thru first cycle. After burners and blower shuts down I have something that is not shutting the gas off. After manually turning off the gas and waiting a while, I can turn the unit back on and will go thru that first cycle again with no problem. Help!!!!

good video

Had a furnace not turn back on after resetting main breaker. Checked for power going to board, 120 volt, good. Bypass the thermostat, so it continually runs and board will not light up, the red light, troubleshooting codes. Figured the board went bad , I am on my second new board same problem. I have tested the transformer to see if it was still working and it seems to be operating normally but I was wondering if it could stop transferring the 24 volt charge and give 120 volt? Does anyone know what I should be checking next? Would the transformer be bad? I still have no light on the motherboard. Any advice would be helpful, except for the one where I can get a HVAC professional, because if nobody gives me any advice I already understand that would be my default option, so past that unwires thanks!

hey Wes, thanks for the video. I've been researching heat exchanger problems for a while now but havent found my issue. My sequence is correct but the flame cuts out abt 3-5 min after ignition and flash code of 33. once the inducer blower finishes clearing out the heat, the error code goes away. What could cause a limit switch to trip 3-5 min into the cycle? flame sensor is good and doesnt appear to be a rollout issue...any advice for this greenhorn?? :-)

It's pretty simple to be honest call for hear inducer motor comes on limited switch close from pressure sends signal to let gas flow the Ignitor heats up we get flames flame detector tells control board that we have flame control board kicks on blower motor and that's it

I don't know who needs to here this, but.... Stop using pookie and excessive screws inside and outside of the plenom, filter and cabinets! Mastic and a couple easy to reach screws is enough.

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Flame sensor and manual reset button! Thank you thank you thank you thank you thank you Thank you thank you thank you thank you thank youThank you thank you thank you thank you thank you Thank you thank you thank you thank you thank you!

because my inducer fan motor does not kick on and I know that's the first step of the sequence. is there a relay that kicks it on and how can I check for that

my inducer fan motor is not working. does it run on high voltage or low voltage ?

The video is too shaky , its makes my mind hurt. Great knowledge but quality is not up to spec sir. Thank you.

i have a floor furnace it old how do i fix it install 710502 Millivot gas value