HOT SURFACE IGNITOR Training for Gas Furnaces! HSI Types, Operation, Troubleshooting!

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HOT SURFACE IGNITOR Training for Gas Furnaces! HSI Types, Operation, Troubleshooting!

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Күн бұрын

In this HVAC Training Video, I Show How to Test if a HSI is Bad without having to take it out for a Visual Inspection and Accidentally Breaking it. I cover Silicon Nitride and Silicon Carbide HSI's. I explain and show types, installation location, testing, and the sequence of operation for a gas furnace in heating mode. I show Silicon Nitride and Silicon Carbide HSI's. Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
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Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided.
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Пікірлер: 70

@CG-qc1ob Жыл бұрын

I’m still learning loved your videos. I broke an igniter I learned the hard way . Just graduated from HVAC school and I’m learning more from your videos than school.

@vernroach3413 2 жыл бұрын

Excellent, just an excellent video...I see in comments they are used in ovens and such...True, and if the amperage draw and the Resistance as they get weaker is not enough the gas valve will not open...The igniter will glow but it still will not open the gas valve...Most require 2.5 - 3amps on an amp probe to open the safety valve on an oven...Thanks for a great video.

@CrabtreeBob 2 жыл бұрын

When I worked for an LP gas company we used to check amperage. I forget the specifics but the flat and round operated at different amperage.

@Android_Warrior 2 жыл бұрын

These tips not only are useful to HVAC but also to dryers and ovens.

@SerenoOunce 11 ай бұрын

Important to note that the resistance with these igniters changes with heat. May start out at 20-50Ω but that resistance multiplies ~10X when powered for current regulation and longevity.

@rolandorosas 7 ай бұрын

Absolutely on the money with all of your insights. I was having a problem with an igniter that only worked once. It turned out that the angle on it was the issue. It needed to be slightly angled and little closer to the burners to ignite. Saved me lots of money and additional frustrations. Great video! 👍👍👍

@hull39 6 ай бұрын

Thanks so much for this video. It is a super clear explanation of how an ignitor works and how to troubleshoot it. My furnace was not making heat and I was on the verge of looking for an HVAC company to come out and fix it but that would have undoubtedly cost me hundreds of dollars and days of delay. This video showed me that my ignitor was bad and I was able to fix it myself. I used a voltmeter to confirm that AC was reaching the ignitor and that the resistance of the ignitor was zero. My furnace is a Trane and I was only getting a max of about 3.5 volts AC before it stepped down to 1.2 volts. The repair was actually quite simple, just replace the ignitor. Thanks again for this excellent video!!! You're a rock star!!!

@steveurbach3093 10 ай бұрын

A AC clamp on meter Worked for the Oven I was working on. The valve was labeled with expected current range.

@electronixTech 2 жыл бұрын

I'm not an HVAC tech but I am interested in your troubleshooting videos and guides and bought your AC Service Tech e-book because it is some of the best documentation I have seen on furnace and AC maintenance and troubleshooting. Thanks for doing this video.

@NickAlberta 2 жыл бұрын

depends on manufacturers specs, some carriers say they should be replaced if the resistance is over 90 ohms. The 98 ohm should be replaced. Be proactive!

@pilotboy217 8 ай бұрын

My heat just went out and i live in a small town. I managed to self diagnose and pull the ignitor and it has a huge crack in it plus corrosion. Had to order the part and now waiting for it to come while i freeze to death in my own home.

@I_name_All_my_guns Жыл бұрын

Thanks, your video’s really help grasp the whole concept from the the text book to actual imagery and functionality

@jkbrown5496 2 жыл бұрын

If you zoom in on the one in the middle that is bad when he applies power, you can see tiny arcs across the crack. Those heat the crack, which likely expands enough to cause the ignitor to start flowing enough current to glow. As with anything, those arc will eventually erode (pit) the crack causing complete failure.

@tphvac87 2 жыл бұрын

Craig these videos are amazing, I’ve been in this field 16 years and there’s always stuff to learn, not a day goes by when I’m not trying to better myself and learn something new! Thanks for these videos bud!! I knew most if not all of this information but I just wanted to thank you! How about spark ignition type systems do you have a video on those, such as Rheem/Rudd furnaces?

@acservicetechchannel 2 жыл бұрын

Thank you so much Tom. we have some older vids on spark ignition. Look up "acservicetech spark ignition" thanks!

@mikehorrigan7806 4 ай бұрын

Your videos are great man, thanks for all the content.

@paulrozinski1488 2 жыл бұрын

Another great video. Thanks again , always a subscriber

@bchrisl1491 Жыл бұрын

When you applied power, a tiny flash occurred on the defective unit and it started glowing in a small area. That would have been an intermittent failure mode. BTY the good one on the left was drawing 245W and the small one on the right was drawing 300W.

@sigor2011 2 жыл бұрын

Good, got mine repaces yesterday after it went poopie in the trousers.

@emen4438 2 жыл бұрын

Hvac newbie here…. If its glowing evenly no white residue, but measures 130 ohms is it still good? Is there a definite limit?

@Falcon-eh8tq 2 жыл бұрын

@@FloatingLeaf1111 @E Man over the years on equipment I've found that 45 to 75 is OK, anything above 100/125 I recommend replacement, a lot of people decide against it the first time you recommend something like that especially if theyve never had a 95 dollar ignitor shut their furnace down lol.

@chrisdeanndavison3626 2 жыл бұрын

I typically do an amp draw as well as ohm check. On the silicon carbide, I generally like to see at least 3 amps. Under 3 amps on a carbide means it might not be getting hot enough. I don't remember off hand the amp draw on silicon nitride, I've had virtually no issues with those. About the only failures I've seen with the nitrides are from getting wet from leaking condensate.

@jkbrown5496 2 жыл бұрын

At 40 ohms they are pulling 3 amps so on a 120v circuit heating at 360 watts. But at 120 ohms, they would only pull 1 am so 120 watts. So in still air, the 40 ohm will turn red 3 times faster than the 1 ohm. And the lower wattage also runs the risk that even the flowing gas could cool it to the point where it doesn't get hot enough to ignite the gas.

@Falcon-eh8tq 2 жыл бұрын

@@FloatingLeaf1111Something to consider is the pressure of the gas is only 3.5" w.c. or 11" w.c. manifold pressure, which is under 1/3 of a psi max. the inducer whipping around at 3000 rpm is going to cool the ignitor down a lot more than the gas flow. Ive found position of the ignitor to be alot more important than pressure or even the condition of the ignitor all important, but also Dirty burner or turbolator wont help either

@peepeepoopoo1399 2 жыл бұрын

You just check the manufacturer literature for the acceptable range. If it’s outside that range then replace it

@wiserthanioncewas4590 2 жыл бұрын

"Hot surface igniter fact sheet" has helped me quite a bit

@MrChipBryant 2 жыл бұрын

Thank you again for all that you do for the industry!

@jasonjohnsonHVAC 2 жыл бұрын

Since i switched to commercial/ industrial a few years ago......i almost never see a HSI anymore. Only on Trane Voyagers. Everything else uses spark. RTU's, MUA'S, Boilers, Unit Heaters. Obviously there are still different brands who use a HSI, but as a generalization most don't. I think Rheem is one of the only residential brands that still uses spark ignition. I like spark better than HSI.

@filemontorres7635 4 ай бұрын

Would like to see videos on low nox furnaces, please...

@hvactechwanttobe1499 2 жыл бұрын

Hi Craig did you have a fire extinguisher for this video on the stand by Good stuff

@Firehawk841 2 жыл бұрын

can you do a video on communicating thermostats?

@Sparky-ww5re 2 жыл бұрын

I found this very educational. Thanks. A few questions when it comes to replacing a HSI. Would accidentally touching the element during installation cause shorter lifespan due to skin oils? Some folks tell me you should take precautions similar to changing out a halogen lamp, that is, use rubbing alcohol if accidentally touched, to remove skin oils that can hot spots and damage the glass when the lamp is turned on. Others say it doesn't affect a hot surface ignitor. Any other precautions that should be considered when removing or installing a hot surface ignitor?

@ducharmehvactraining925 2 жыл бұрын

great job Craig

@user-ry2sd9wh1r Жыл бұрын

Hi Sir, Thanks a lot for the video. Learned a lot. Here, I've got a question to ask for help. My house has a Goodman 2 Stage gas furnace. Recently it stopped working. I doubted the failure of the control board so I ordered one and replaced it. But it still doesn’t work. Problem is same. After the further check, I've noticed that if I connect all 5 pin connecter (link inducer and igniter), the draft inducer won’t work. It has only a couple of volts. But the ingiter has around 110 volts of power. When I disconnect either end of the line to igniter (on 5 pin connecter), the inducer runs, but igniter doesn’t (surely, no power in). When the inducer runs, it runs normally and smoothly. No any sign of problem. The igniter has 48 ohm when tested continuity. Seems also good. What could be the cause? Thanks.

@dlyall26 Жыл бұрын

That first one got hot 😂 started to burn the wood

@professorhvac 2 жыл бұрын

Thank you. Very interesting video. Great tips.

@gibasea4080 8 ай бұрын

great vid

@realestateservicessaleshea99 2 жыл бұрын

Thanks again for the videos. 🥃🥃🍺🍺🍺⛳🎳 Stay safe. Retired (werk'n)keyboard super tech. Wear your safety glasses!

@davemaldo07 6 ай бұрын

How do you check for micro-amps on a furnace using the hot surface igniter as both the igniter and sensing rod? After having disappeared, (I thought), they’re back. I’m wrong. The system I was remembering was intermittent spark. What I’m seeing now is silicon nitride hot surface.

@wahid5543 2 жыл бұрын

Ty so much for ur educational video I learned a lot

@Mudcat597 2 жыл бұрын

Very good information. Thanks 😊

@mobilecommunicationsnetwor5268 2 жыл бұрын

Are these igniters in direct vent hot water heaters?

@aaronrich4560 Ай бұрын

Does which wire goes to where matter for the igniter? I was trying to replace mine and cannot remember which one went to which side of the igniter.

@lucasmorgante8419 Жыл бұрын

Hi! What about flame sensing using a HSI for example in trane units? Thank you. I enjoy your videos

@stephenacman3244 Жыл бұрын

Thank You!!!

@ed6837 2 жыл бұрын

Thank you good information

@Niveous23 2 жыл бұрын

Ah yes, the hot surface igniter. Or as I call em' the "Don't even sneeze in it's general direction...just make sure the burners run" Those asshole things will crack if you so much as remove a screw for the in-shot burners to clean them. Not worth getting a system with one if you enjoy maintenance.

@garyoconnordbaairrepair7775 2 жыл бұрын

I had a No Heat call in 2019. I went there and tested every part for heat. The Hot Surface Igniter was not very bright. I took ahold of the connector and turned it to see the part numbers. The igniter started to glow real bright. What was the problem? Just some corrosion on a contact at the connector. That was the second job for that customer. The first was a no cooling call. The capacitor for the indoor fan was replaced. The classic bowing of the top of the capacitor. My thiord time there was to replace the return air register. It sits low on the wall and does get hit at times. The customer inquired about the register on the first job.

@The-H-inADHD 2 жыл бұрын

Thank you!

@jimk.8783 Жыл бұрын

On the 24v ignitor. How many ohms if bad? Over 10 is bad right? Fact sheet says should be 4-10 ohms.

@coopermuccio4409 2 жыл бұрын

The third one looks like a diesel glow plug. Are they the same in operation?

@dlyall26 Жыл бұрын

Mine will glow bright red but sometimes won't glow at all, I did notice a little white spot on it so could it be going out?

@Bruce19 2 жыл бұрын

How about spark ignition?

@Bruce19 2 жыл бұрын

Great video on the HSI, appreciate all your shared knowledge, keep up the great work

@dennisqwertyuiop 2 жыл бұрын

great demo

@-AnyWho 2 жыл бұрын

my igniter is in a caloric oven, glows but does not lite burner for oven. caloric site made it sound as tho if its weak then it wont open gas valve and i should replace igniter. does it have to be cracked to be bad/weak?? or can it just be old age? ( my caloric oven is 30+ yrs old or so) ... I'm just asking cuz from what i see, i don't see any cracks in it ...

@mikecol537 2 жыл бұрын

is possible to change a HSi silicon Carbide for a HSI silicon Nitride?. Thanks

@ificandoityoucandoit6507 2 жыл бұрын

Do you have a heating/ furnace/ boiler book on the market.?

@biggstile Жыл бұрын

I made a mistake and (preventative maintenance reasons) cleaned my silicone nitride version, which looks just like the newest style in your video. I used 0000 steel wool, then cleaned it with alcohol before re-installation. It was in super good physical condition and worked fine, before and after. Will this likely shorten its life?

@harryschrysan3183 8 ай бұрын

Yes!

@billb.4901 2 жыл бұрын

My gas furnace has SPARK ignition which has proven to be very reliable, so I’ve always questioned the HOT SURFACE IGNITOR. Why use them when they always fail. How would you convert from hot surface ignitor to spark ignition. Thank you.

@chrisdeanndavison3626 2 жыл бұрын

Hot surface has finally caught up with spark in reliability with the silicon nitride. Why HSI vs Spark? Spark ignition requires a more complicated circuit to produce the spark, where hot surface is just a relay with 120v and most spark have intermittent pilot, so a more complicated gas valve, a pilot and tubing for the pilot. It wouldn't be impossible to change from hot surface to spark, but the furnace was not engineered to have that type of ignition and the liability of changing it could be substantial. But to answer your question, the 3 main differences between hot surface and spark are: 1. the ignition module or control board has to be spark. 2. The gas valves are likely different as mentioned before. 3. The ignitor would have to be replaced with a spark/pilot assembly.

@jkbrown5496 2 жыл бұрын

Intermittent pilot with spark pilot ignition is likely what you have. That way the pilot flame is proven before turning on the gas full. If you try to light the burner with spark ignition, you could end up with a cabinet full of gas if the ignition failed. And then you could have an explosion. Should the gas not immediately ignite with a hot surface ignitor being poorly placed, it will sooner rather than later thus reducing the risk of gas build up. Ultimately, a pilot, even intermittent, is a cost for the gas, an impact on the efficiency and likely was essentially abandoned to meet government climate change regulations.