It's crazy that supply chain issues are still affecting companies in late 2022. They need to find suppliers in multiple countries so that if one fails to meet demand, they can ramp up production elsewhere.

There’s several things you can do to get them temporary heat but the first thing I would check after no blower would be to go to the thermostat and put it in the Fan On position to see if that circuit is working. You could also get a universal control board that replaced lots of OEM boards and not deal with Lenox if you can’t get the OEM from them.

Ted this is a perfect example of technological crossroads.... The PCB on that Furnace is built to control a Version 2.3 ECM Blower Motor. Lennox decided to NOT implement a Version 3.0 ECM PCB on their Furnaces at that time, so the way to circumvent the issue was to use the Version 2.3 ECM PCB and install a "decoder" of sorts to literally translate the AC prior version ECM language into a DC communicating ECM Blower Motor. Basically....technology causing technological issues!!!

That old motor will make a good boat anchor now. 😎👍

Your response “ah huh” was mine too when I saw that ECM. $$$$ service call. I’ll keep my good old PSC motors, thank you.

Excellent work as always plus always a class act especially when talking about a competitor company…👍👍 Glad you are getting the replacement job and hope to see videos of the job

How about a single stack old fashioned heater style blower relay and leave the psc motor as a permanent fix. The slight loss in efficiency won't be as costly as having you come back and swap back to the OEM parts.

That little transformer looking device is used for "circulation" speed. They use that to send a very light signal to the blower module to step the speed down to circulation only.

Lennox used to be made in America from what I understand. I cone across very old Lennox furnace and ac. Built like a tank with the metal and electrical. Probably still needs replacing or really watch the CO output. But I am always impressed seeing that very old Lennox stuff and made in America. Reaching 30 to 40 yes old

Years ago where I was working started using those air drive zone dampers for the most part they did ok I guess we did have a pretty hard winter one year and alot of the homes that the box was under the house or in a cellar the pump or line froze and so did alot of the 90 percent furnace drain box so they went back and rethought all of those installs I guess it was a live and learn I was only like 8 years into my career so I only knew enough to be a danger to myself but things like that is what teaches us thanks for the video

First time viewer from Canada. Am an engineer but know nothing about your world. I found this a fascinating fix, landing yellow and ultimately black on ground and circ was very cool. The blower is continuous but at least they have heat right away. I am still trying to figure out the cap you mounted on the plenum. Liked and subscribed.

Brother, you help me more times than you know. Thanks for the chipmunk voice, that was a much needed added bonus!

Well, if Loren enjoys the mechanical stuff, she should (as I do) live for those moments when the fan motor drops out of the blower wheel with no special tools! ;)

Good vid Ted and a BIG shout out to Lauren ... Thx for posting as usual ...

Love the video, I hope you take the time to get us a bit of footage of the new install. Your install videos are the best.

I work for a global manufacturer of HVAC components and I'll bet parts from my company are in that very furnace Ted is working on. Our manufacturing plants are in Mexico with distribution warehouses in Canada, Europe and Asia. My specific function is auditing parts prices for profitability. The supply chain shortages are still very real unfortunately as we close out 2022, but that's what we get relying on China for the majority of raw materials and components. Ted was shocked at the cost to replace that board, the chip shortage is responsible for that. My company is adding surcharges to the per piece price of many components and those with chips sets are the worst. One chip we use has a $25.00 surcharge. Look at that board and count how many chips are on it and you can see how it shoots up to $900.00 cost. No we aren't gouging anyone; trying to sell our products priced competitively, deliver a quality product in a timely fashion is an everyday discussion with our customers who constantly threaten to take business elsewhere. The irony of those threats is where they going to go? Our competitors are in the same situation as us.

Wire a sequencer in parallel with the heat circuit. Slight delay on and off enough to avoid high limit problems.

In the early 2000’s I would go on calls and come across Lennox and try to order their parts and it was a super difficult and costly process. I never enjoyed working on them and didn’t understand the appeal. All I know is that if someone has one of the mainstream brands, you can get them back up and running with inexpensive parts from Amazon.

Installed many "arzel" zoning systems up here in ohio and honestly they are pretty reliable unless homeowners would get in box and monkey around and mess something up. Enjoy all you videos!

Glad you go them going...nice move. I wonder if that ECM was replaced not too long ago as it has one of those "universal" 16 pin motors.

This was awesome seeing the heat restored. Would the rust stain above the power choke be a factor? My guess is no...most likely the static pressure took out the electronic head of the motor.

Jack of All Sprays is legit! After I saw you use it on a motor swap once, I ordered a 6 pack! It's good stuff.

One trick I like using when trouble shooting blowers is, to take a cut off male end of a power cord and wire the motor leads L1 and N directly to 120V. Its a nice little trick to double check your diagnosis. saved me a cpl times from ordering an un-needed motor.

I have done that a few times. But no need for full time fan, unless you are doing a temporary fix till parts come in or unit is replaced!! For a permanent fix, Just run common to the blower and break the speed through a one pole sequencer to give you the on and off delay! Energize the sequencer with a pair of cooling and heating 90-340 isolation relays. A call for Y will close a relay sending 24v to the sequencer in cooling and a call for W will close a relay sending 24v to the sequencer in heating. Works as a permanent repair when replacing an ECM motor with a PSC! works in an air handler as well in a 240v set up! Leaving a blower running constantly will pull cold air back in the house when it is cold and humidity back in the house in the summer.

VSM/ECM good for efficiency and varied application flexibility, but not a fan of the reliability. Had mine quit one day in winter, with a electrical smoke smell , the burning circuit board kind of smell. Dismantled and found the in rush current limiters bad. Seem common failure on those... I replaced them and cleaned everything up. Ran great for another 5 months then just quit. No smell or noises this time. Did not see anything wrong (that I could get to). Had ¬340V DC from the power rectifier board into the motor half... But that's where I got stopped because the motor half is potted and no easy way to get to it. Yep, $1k+ for the motor and matching ''controller''... Dad had identical system and I borrowed his motor/controller and it fired up. Nope, not paying $1k+ for a replacement that likely will fail... Installed a tried and true PSC motor, adjusted my airflow and pressures and 8 years later shes still purring along, zero issues. $75 vs $1k+, no brainer for me. Not worried about the efficiency stuff, the costs are negligible to me.

That part you said was a filter for VS motor is actually called motor choke.

York parts too. And many others. Especially on the slightly older high end stuff. Variable speed blowers etc

26 year vet here I really enjoy watching your videos. Glad to see other guys out there that onow what they're doing. Lennox is the only brand I've ever seen to install a shipping support on their large motors. You take it off when installing.

A lot of companies have found out a lot about depending on China.

I am so glad you posted this, I was sure I had been ripped off when my Rheem blower motor with the module had to be replaced, $1200. They wanted to replace it with a Goodman. I still have the Rheem. When it gets replaced it will be with a Trane heat pump.

A lot of condensate drippage corrosion on the shelf snd down onto the squirrel cage, and a lot of corrosion visible through the combustion peephole.

That damp basement was causing a lot of rust in that unit. Great video

We still have many pulse furnaces in the w ga area.

Did lots of pulse installs. They sure saved gas over the standard efficient of the day. No dc drive or 2/ multi stage burner. Still know of a few still working well

Damn. I wish my pcb fab house had the choice of yellow silk screen. That board looks sick!

Ted workin' down cella! The big problem you had was you're supposed to wear a gatsby and overalls when you work on Lennox equipment 😄😆😉. Good temp fix.

The "extra leg" is lennox's "shipping bracket". I guess they think that will keep the blower from receiving damage during transit. It is meant to be removed during installation though.

Haha, love the Happy Gilmore reference! “Give ‘er a little tappy, tap-tap, tap-aroo”

That is a newer ECM motor. The high static from the zoned system probobably killed the original and replacement motor

Tempstar is no better. Tried to find an OEM X13 motor for a 5 ton single phase package unit. Customer has 5 of these units. Tempstar said 22 weeks on national backorder. Ended up going to a Bryant supply house, and used a couple of their Totaline universal X13 replacement motors, much cheaper and worked good right out of the box.

I love seeing the yellow 110 electric wires just dangling along side the furnace. People in the Chicago area give me hard time for using couple of Greenfield by the furnace. Different codes I guess.

I'm kind of surprised that service manuals are not available on line for any make or model, perhaps for a fee. That would sure beat head scratching.

I remember last year Lennox coils were TBD arrival. I know they had a bad batch of furnace box coils from like 2010-2017 where they leaked prematurely. 2015 seemed to be the sweet spot. I can't remember if it was because they weren't coated, different material or just bad design.

Unlike another KZfaq HVAC guy I could name, Ted's videos are always kid friendly because he doesn't feel the need to swear and cuss for the sake of it. I guess it's all in the breeding.

The days of “Atta boy Dave” for Lennox are over. Lennox have become a moneymaker for service companies. Hard to get parts though.

Why would you not install a relay to cycle?

If you're going to put a PSC motor in it why not use a sequencer so it cycles on and off with the heat

The part you removed was a power factor choke. The used the on the older ecm motor for efficiency. You don't see them anymore.

Thank you Ted---go Loren!!!

DC Drive....Bummer. That is a pretty penny

Jumping Lennox ecm are exactly the same as you described

Excellent video. If you installed a relay, how hard would it be to add a delay on break relay??Thanks for the video.

If that ECM motor has been replaced once before, I'd bet this existing motor itself is still good and the module is bad. That's usually what happens to those ECM motors, the logic part fails leaving the mechanical part unable to run yet there's nothing wrong with the motor workings. Seems like such a waste to kill all of the energy savings that people are getting to price an ECM part to be $900 when any three speed PSC motor is around $250. This is why in many cases, the higher end HVAC systems DON'T really save you money (on utility bills) in the long run due to parts that are very expensive and also a long wait to get. When they work, they do function much nicer, quieter and for a little less on the utility expenses however, just one simple breakdown is so darn expensive and inconvenient trying to source the parts. As in this video, Ted got them up and running best he could under the circumstances. Truly, its very difficult to believe that a motor was that much money and that long a wait in this day and age. Maybe the HVAC industry needs some rules that vital and safety parts must be available from the manufacturers for a good 25 years and in stock to serve their customers. The idea to support them only as long as the warranty term is purely wrong.

I can’t say I’ve seen a motor with a 16 to 4 wire converter on it like that before. Like you said, that motor wasn’t likely the original setup

consider using an ecm tester if its the board then you can leave tester on it till board comes tester will engage motor if its still good

Lennox Pulse was the Golden days of innovative engineering at Lennox. Just like the spine fin can style Carriers that are still running today. And then both companies fell off and started making thinned out failure prone junk.

My Smart Comfort heating unit went out over 2 weeks ago…….can’t even get Home First warranty or Clayton Homes to call me back…..luckily I have a portable Buddy propane heater and we have only had 3 cold nights in southern South Carolina……my units aren’t even two years old.

*If the installers did what they were supposed to, there will be an internal proper sized deflector diverting supply air towards the 8-inch line, installed at the main trunk connection. There's no way any substantial quantity of air would take a straight tee 90° turn on its own without a deflector.*

Just add a relay, for cool and heat, run a 24 volt common to both relay's, heat terminal off the board to the heat relay and cool off the board to the cool relay and activate the relay's right from the low voltage terminals on the board, that powered the VS motor. Of course you would have run a 120v wire, and just jump 120v from relay to relay, and use the red on the heat relay, and the black on the cool relay, and you're done. 🙂I've done this before, even with the 16 pin VS motors.

Genteq makes a GO / NO GO tool that can test those. I do commercial Lennox units and actually have made up a giant kit of tools to test boards, motors, modules etc..... They are not meant to be very field friendly. Lennox parts are coming down the pipeline a little better, but between the Marshaltown Tornado and the recent pandemic, Lennox parts have been super hit and miss.

That’s one thing I don’t understand. Why can’t they make an option wether you have a psc motor or ecm, they can both work by just supplying 2 connections for psc or molex for ecm. It’s all about the money with these manufacturers and they don’t give a rats a** about how the customer feels. And it makes us look bad if we can’t get them going. For how common ecm is becoming, you would think the supply would be much better now but they never have them in stock and to expensive to keep on the truck.

I wish My Parent's House had a Basement in it. The Ground was to wet when they built their house for a Basement.

The reason I go into a job site with just the basic tools is it gets really old carrying a tool bag full of tools and its so much more enjoyable and my legs and back thank me later

Is only the lower blower section interlocked? Seems like there wasnt on the top heater section.

Nice to see another video from you. Hello Lauren! Where is Lennox made? Is this possibly a good argument in favor of North American - made Goodman? I have to think that supply chain issues for anything coming from Asia have only just begun. You need two small flashlights, one a headlamp. I'd suggest the Nicron N7 as one of them. It has a magnetic tail-cap, and the head pivots, so it can be aimed. It will run on any AA-size cell, from a 3.7V 14500 Li-ion battery down to a 1.2V NiMH. The headlamp could be something like a Sofirn HS-10, which uses a small 3.7V 16340 cell; your hair probably weighs more than it does.

Just so you know YES the low speed and high speed will be hot when theres power on medium and vice versa

Something wrong with Lennox these days. Bought one of the last boards for a certain series of furnace in the country a couple days ago. Carrier lacking on parts also. Not good. I don't understand how nobody can get parts, whats stopping manufacturers from making parts?

Not a big fan of Lennox myself,had to buy an expensive flame sensor from them the other day,unit wouldnt take a universal one,not to mention it was a pain to get to

Lennox, you ".... must hate your dealers...." Ha ha ha!

Hurting country wide I believe for Lennox I’m out here in az and heard same stuff

Hey Ted, Enjoyed the Video as usual but more importantly, How About those Gamecocks !!!

Go gamecocks.... The streak ends it was so sweet. And brother you do great work

So, you are waiting for the variable speed motor to come in then swap it out for the generic one? I almost bought a variable speed motor with my Lennox back in 2001 glad I backed off. As I have aged keeping it simple as in the less electric gadgets the better, I call programmable thermostat service calls for myself and rentals.

The ECM probably has a blown capacitor in it. $5 plus soldering...

It says this was 10 months ago. Why is it playing again?

There's a lot of rust on tgat unit.

Oh my God. That one look inside the burners. That unit is not that old. Corrosion is everywhere inside the burners. Gas pressure or flue might have issues. Can also see water in furnace compartment. Variable speed blower motor failed due to water. Water came from plugged drain. Fix the real problem or root cause. I saw all that in first 30bseconds.

Could it be possible that the cut ground could have been an issue causing the ecm motor to not want to work properly? Just for my personal tech info

Ted, what hp motor did you go back with ? Great video by the way!

The XV 20 with zoning for the win…

Supply chain issues - must be the reason that my Goodman ECM motor has increased in price by $200. I guess that I will convert over to a PSC motor when the ECM motor fails.

Made it look easy.

Retired et love your show, wont buy a lennox

Single pole sequencers make for nice time delay relays. Lennox putting a 16 pin module on a motor that isn't. Why use the 16 pin at all.

Lot of guess work in your diagnosis

you need to find a good eletric repair shop that can repair those motors.

What do you think of the Mr Cool split units?

I have an Lenox pulse furnace in my home that is 30 years old, still working like a charm. I am curious, YOU DON"T LIKE THEM?

Put a fan sequencer in there and you don't have to hack job it with the fan constantly on. Just replaced a variable speed blower with a peanut relay for cooling and fan sequencer for heating. And yes those prices are legit even for dealers. York variable speed was 1300 for the variable speed motor. Lennox is about the same.

Do you play NMS?

Old chum I do this all the time, you save the consumer money and the psc will last 5times as long as a x13 piece of trash, the energy payback will not be realized until the unit needs to be replaced. X13 is just smoke and mirrors to get manufacturers more profit in my opinion.

At $1000 for a motor, it would be time for a new Goodman.

I got a few motors.

Toenail clippers…aka wire strippers!

Lots of chipmunk HVAC guy in this video!

Variable speed motors = nonsense. Two speeds. Slow one for heat and fast one for cool. A two speed motor will work for 50 years. Good choice leaving them with full time fan. That keeps the heat in the house homogenized and fewer cold areas.

Supply shortage is due to incompetence in the government

You da bomb !

Man everyone I talk to hates Lennox but I’ve had more issues with American standard than any Lennox’s

Dang them trane prices lol