Electric Heat Sequencers Explained (HVAC Training)

[@johnstancliff7328]

and I'm so glad I'm an elecrical handyman..... was able to repair my furnace with no problem.... preventative maintanence is key!

[@taylerellis378]

Im any HVAC pro 30 years. Sequencers are a thing of the past they were needed in the past to turn each element on one at a time to prevent the transformer up on the pole outside the home from blowing. With new transformers today they are 100% no longer needed. If yoy see a bad sequencer in electric heat repalce them with a contactor with lugs and up the wiring size to #10. Try to replace all push on terminals with eyelet type terminals as they prevent resistance to electrical flow that over heats and melts wiring. There are kits to replace the entire electrical heat system including all wiring, contactors, limits, safteys, elements, and breakers that are often less expensive than replacing individual parts and are very quick and easy to install. HKA-15C for example. These kits are all comming with contactors instead of sequencers like I said they are no longer used today as they are a failure point where contactors are much more robust.

[@AlexRodriguez-sq6iy]

And some sequencers are hard to find!!you can’t leave people without heat until the new ones come in..loved this info thanks.

[@dalefaurschou3167]

Hi. If there is no forum of sequencing in electric furnaces now. Are you saying all the elements come on at the same time ? How are they then controlling the voltage drop when the furnace starts ? How are they controlling the voltage spike when the furnace shuts off ? Thanks

[@taylerellis378]

@@dalefaurschou3167 as stated before we size up the wiring to #10 this cancels out the voltage drop within the unit and most electric furnaces are already provided from breaker panel to furnace with #8 or better. Yes all elements can come on at once. If its an issue you can install 2 contactors. 2 elements on one and one on the other. Put w1 to one contactor and w2 to the other. Or stage with a timed delay on make relay using only w1.

[@robertstonebreaker8394]

Good info thank you sir .

[@Hvacmike]

I just started teaching hvac and have been recommending your channel to my students. Great content, much appreciated!

[@TaddyDigest]

Awesome, thank you!

[@Robnord1]

All my mobile home furnaces are gas because we're out in the sticks where propane rules, except one electric unit in the city...so thank you. One thing worth mentioning for newbs; Wire used to replace crispy ones should all be high quality 105°C rated. The good stuff. Thanks for yet another informative vid Tad!

[@countysecession]

Thanks for the video. I'm from west Texas. I bought 21 mobile home rentals in June. I'm learning about how to maintain them. The HVAC systems and the drain/sewer/septic issues are in a dead heat for what requires the most maintenance. I've learned tons about AC this summer and I got my first call for no heat yesterday.

[@damianmlamb]

Dude SAVED MY ASS! WOW THANK YOU ABOUT 400 DOLLARS WORTH OF CALLING SOMEONE YOU ROCK!

[@TaddyDigest]

You're welcome bro thank you for watching

[@damianmlamb]

@@TaddyDigest oh man! Yea no problem! Totally awesome brother! 🤟

[@damianmlamb]

@@TaddyDigest not to metion I can bulid a full house but electricity and pluming count me out 😂😂😂😂

[@littleshopintheshed]

This exactly what just happened to us, but it was a heat strip relay that the contacts were welded closed. I bought a second for a back up, glad I did. After seeing you use the clampmeter, I did the same, found one of the other relays was clicking but not contacting. Thank you.

[@Alex-jo2oi]

Love the modern refrigeration and air conditioning. Gotta pick it back up. So much information it’s literally got every bit of knowledge you would need for the field

[@TaddyDigest]

You're right so much knowledge I probably only know 1% lol

[@kimberlyphillips4761]

Thank you so much for the very thorough explanation on how to do sequencers for my furnace out of all the ones I’ve seen on KZbin you are the best thanks again

[@michaelmaclachlan2152]

HVAC tech in Washington, thanks for the tip about going to the website to look up the specs on sequencers.

[@TaddyDigest]

Glad to help

[@michaelmartin5582]

I work in eastern NC and run into lots of mobile home units. Thanks for the video.

[@TaddyDigest]

Absolutely Michael you're welcome thank you for watching and commenting

[@91GT347]

Don't you want to come fix mine ? 😂

[@JoseLopez-gd6tl]

Thanks man. ❤❤ you really know how to explain and I learn by watching you videos. God bless you sir.

[@USA-GreedyMenOfNoIntegrity]

I always use 10 ga wire with good crimp terminals and you’ll have less overheating issues. Also good annual coil/drain cleaning, tape/silicone top of electrical compartment to keep water out will make your breakers/sequencers/transformer last longer.

[@TaddyDigest]

Thanks for the tips!

[@Robnord1]

@rv 10flyer84 Excellent advice! If the factory 12 ga is burning, the upgrade to 10 ga is very smart, so is use of higher quality terminals. All my hi-temp terminals have nylon insulation sleeves (105°C rated), not vinyl like the cheaper automotive (90°C rated) grade stuff.

[@seniorchief48]

I installed one of these furnaces when we built the house in 1997. Never had a problem until last winter ended up having sequencers replaced twice about a month apart on two separate service calls. Finished out last winter ok. (Also had a couple of burnt wires each time). This past week it has started running uncontrolled again. When it does this I shut off the power for a while and after power on again it may run most of the day before before the problem repeats.

[@justinmorrow9552]

Thanks Tad, was very insightful, good explanations. From Western NC, learned from your "customer complaints" part, and your diagnosis of the circuits of the sequencer.

[@TaddyDigest]

Awesome thank you so much for this comment you're welcome my friend

[@thehouseofhorsepowerautobo4506]

Thank you for taking the time to make this video and share! I'm having an issue with my intertherm electric furnace it will run for a bit heating only half what it normally does then in throws the breaker at the wall panel.

[@TaddyDigest]

You're welcome thank you for watching

[@jessesmith1181]

I learned you are a great KZbinr!!! Thank you for the awesome video!!!

[@TaddyDigest]

Awesome man thank you so much for watching

[@jimmytindall5224]

Jimmy from Louisville ky I been looking on-line for a video like this I think u may have solved my problem I'll let u know when I get home

[@TaddyDigest]

Please let me know my friend thank you so much for watching

[@skipanardoross6805]

Hoping someone here can give me some advice. I have some electrical knowledge but no furnace experience. Nordyne E3EB-015H blower made an unusual, sort of deep whir, sound and kicked its breaker. The fan is also hitting the enclosure slightly. I did a capacitor and resistance check on motor that seemed ok. I'll put the readings below. I couldn't feel any slop that would have been bearing related but there was some movement from the mounts. I thought that may have been ok since it has the rubber bumpers but, after watching another video, I believe that I should have tightened them. After reinstalling, the unit ran for a while before blowing warm air and shortly after that it sounded like it was changing speeds but then made the weird whirring noise and stopped. Instinctively the first thought is the motor/capacitor but I feel like something else is going on. I know that a relay was replaced about 8 months ago (I don't live there). Any ideas or advice? Readings: High = 25.7, Med = 29.7, Low = 37.7 Orange to Black = 22.6

[@abrahammendez385]

Hi Taddy. I have a question. I am trying to make work an electric heating unit. It has two thermo units. I wonder if both of them has to be conected to the white wire from thermostat? Thanks and great video.

[@TheJohndeere466]

My furnace has 4 elements and 3 stacks of sequencers. They burn out fairly often. I have probably replaced atleast 6 in 40 years. Would there be a way to use some heavy duty relays or magnetic starter in line between the sequencer and the elements to take the load off the sequencer. This way the sequencer would only have to supply the power to energize the relay instead of the large draw of the element.

[@c21meister]

My favorite book

[@ColtonBarrett]

I'm getting ready to replace the OEM sequencer on my mobile home furnace. The replacement (an Emerson/White Rogers) has the labeling in a different order for the set of contacts (e.g., where M5 and M6 are on the old one it's reversed on the new one. On the old one, M5 is on the top terminals and M6 is on the bottom terminals, but on the new one it's the other way around). My question is should I still wire it exactly the same as the old one? From everything I've come to understand, this shouldn't matter, and I should be able to wire it exactly as it was on the old one. Wire for wire on the same terminals, regardless of this difference. Also, my old one has jumper wires, whereas the new one is already linked (like the one in the video). I'm assuming I no longer need those jumper wires? Not that I could connect them to the terminals with the link in the way anyway. I'm sure that seems obvious, but I just want to be thorough with regard to my limited experience.

[@MikeMiles-d9j]

Hi Tad. I’m dealing with a similar issue helping a friend restore heat in his mobile home. The original sequencer has one of the metal jumpers bars at the bottom removed, it appears to have been clipped off. The new one has both the metal jumpers bars on each side. Is it ok to leave it as it is, or should one of the bars be removed, like on old sequencer? Thanks.

[@jamesking7717]

I got a intertherm electric heater Simone removed from a mobile home , I want to install it in my shop.. not a electrician but have wired a couple shops with 110 & 220 outlets.. wondering how to power up this unit so to test it to see if it works .. can I hook it up with a dryer cord and plug in?

[@aquariumaquarium8080]

Great video I have an electric heater in my mobile home and it heats up pretty good and turns off automatically good also but now it has a strange smell coming out of the duct. What can it be?

[@TaddyDigest]

Thanks for sharing

[@NFLdom22]

Can a bad sequencer cause your blower motor in an electric furnace to stop running? I have a sequencer with a melted apart wire that used to be attached to it. I’ve changed my capacitor for the blower motor and the blower motor does not turn. Just a very loud humming. And then the blower motor gets extremely hot to the touch. What must I check now?

[@SCuttingEdgeLawnService]

my electric heat furnes is on and of so when can I find one of those sequencers ?? thank you for your video

[@TaddyDigest]

Heat Sequencer amzn.to/3CRSK2Y

[@Masteradamant]

Can you explain what happens when a wire burns slightly instead of completely? The power for some outlets occasionally fails to connect at all; as if the total load of the wire was an issue. What I learned so far was that the wires connect to the breaker, would that indicate that this were the problem?

[@charleslynch2938]

Very knowledgeable

[@TaddyDigest]

Thanks

[@kellyharris8970]

Got a question please, my mom’s electric heat will shut on and off but not blowing hot air, I’m assuming the element is bad but last winter it wouldn’t shut off, I have the sequencer and I’m going to try a troubleshoot it!

[@TaddyDigest]

sequencer is bad probably

[@kellyharris8970]

@@TaddyDigest thank you!

[@davidfrady7621]

Hello, Thanks for the video. I am actually working on my intertherm furnace right now. I bought the double sequencer like in your hand but actually broke that bar off connecting the 2 because mine before were separate. Did I screw that up? My heat is blowing out cold air. I took pics of the wiring before I took them out but my pics didn't come out so great. I have been working on it for 3 straight evenings looking up diagrams, videos, and pics online trying to figure this out. I got it hooked back up but it still blows out cold air. But I feel like I've hooked it wrong. I can't make out where the wires go from the breakers and there's a jumper wire I really have no idea where it goes. I know you can't see what I'm saying but maybe you can give me an idea. LOL! Thanks

[@tonykillingsworth9247]

You may have all your wiring correct

[@tonykillingsworth9247]

If the Sequencer has separated you may be able to hold it down on top so the internal parts work ...don't get shocked use insulated tool ..if heater starts working ...replace the Sequencer with another new one ...be careful they are made cheap...handle with care !!!

[@danielhouse2895]

For the first time in 12 years I sucked all the cob webs and and blew out the unit. Cleaned it out real good. I turned the break back on and turned on the Heat. I smelt a bad burnt rubber smell. The Heat coils stayed on after unit was turned off. So I turned the breaker switch back off. The wire that connects to the sequencer is melted. How would me cleaning the unit cause that? The sequencer to malfuncition?

[@9to5techs]

What lowest temperature can a basic 3.5 ton 14 seer2 Goodman GSZB4042 heat pump work to. In mobile home.

[@TaddyDigest]

in heat mode, probably 30 degrees with complete efficiency before hitting the balance point

[@johnnykegler1522]

What type if wire is the grey wire on the spool i have a burnt wire

[@gabrielmelendrez4372]

On the sequencer what does the bimatel between the two sequencer do, the one we have does not have bimetal between the sequencer does that mean the sequencer is bad

[@TaddyDigest]

It's a limit switch so when the fan is not working or there is low air flow problem the bimetal will open and it will cut the heat strip off until the heat goes down

[@gabrielmelendrez4372]

@@TaddyDigest because the old sequencer didn't the two bimatel I went ahead and cut them off did I mass up?

[@grandma2maj]

I have a 20 year old manufactured home with a forced air electric furnace that is blowing cold air. Fortunately, I also have a wood stove and spring is here. But I noticed my blower is going fine but only putting out light warm air. I changed the filter. Didn’t help. Could my heating elements be bad? I live in the boonies where it’s expensive to get a heating tech to come.

Does the sequencer control when the blower turns on? If not what does control the fan?

[@TaddyDigest]

Yes the sequence are usually controls the blower coming on

[@PhillipFrischman-vo8gm]

Good job...

[@TaddyDigest]

Thank you so much 😀

[@emduplessis9996]

Exactly what type of wire do I need and where do I get it? I need to replace two heat sequencer wires on a Nordyne unit. On current wire, it is red with 105°C. CSA 12awg. Help, 🙏?

[@TaddyDigest]

Stranded number twelve wire

[@emduplessis9996]

@@TaddyDigest Thank you!

[@roqueherrera8471]

Awesome hermano what is PLM with the numbers 1 threw 9?

[@TaddyDigest]

I'm not sure

[@ramseytrain]

Usually those sequencers fall apart from becoming brittle, Answer this question. What is the best way to wire a mobile home electric furnace to a heat pump condenser such as a goodman HP or Rheem, seems like everyone has a different method

[@robsim4692]

However you do it make sure to do it cocks out for Harambe

[@edisona.543]

In Hindsight. would you have use a #10 wire since it was drawing 20amps+ and wire were burn? curious apprentice

[@TaddyDigest]

Yes if it's over 20 amps then I would definitely use number 10 wire stranded only

[@HoodHandyman]

Great video valuable info I subscribed thanks

[@TaddyDigest]

Awesome, thank you!

[@randynBroncos]

Question: if it draws 20 amps, do we use 10 gauge or 12 gauge wire on the sequencers? Didn’t catch what you said

[@TaddyDigest]

12

[@switcheffect]

i have a new unit guy kinda screwed us on it got one bigger then we needed but needing before winter hit but it runs 5mins shuts off kicks on 5mins repeat all nite long and has been using about 2500-3000 kwz a month cuz it dont run long enough to heat up the rooms and keep them that way could this be whats wrong with mine have had 3 ppl look at it and cant seem to get the issue fixed

[@kundalinireikiwithlauren8682]

My electric furnace has been making a constant clicking noise when on and off, still blows hot air. It’s an old mobile home, I don’t know what could possibly be wrong with it.

[@dalefaurschou3167]

Hi Tad. Please correct me if I’m wrong in what I just saw and heard in this video. Near the end of your video when you were testing amp draw your meter showed the element you were contacted to, was energized before the blower motor had started. This is not correct ! Depending on model/type of the sequencer. Your blower motor is to start before any element is energized or with the first element. Under NO circumstance should an element be energized before the blower motor.

[@TaddyDigest]

That is correct the blower has to run or the heaters will trip the limit switch

[@TaddyDigest]

Usually the thermostat settings are the reason the blower doesn't start immediately Sometimes the thermostat needs to be switched from gas to electric

[@dalefaurschou3167]

Hi. Yes all I was trying to point out was that it appeared that you had an energized element before the blower was energized. That can only happen if the fan isn’t connected to the first tripping sequencer as it should be

[@dalefaurschou3167]

Hi. Just saw your second reply. I’m not sure I quite understand what you mean about the thermostat settings and the blower coming on after an element. Correct me if I’m wrong but all the thermostat is doing is sending current to energize the sequencers, which in turn are to be wired so that the blower starts first followed by elements.

[@TaddyDigest]

sorry I was thinking of another 😅 job lol

[@chaderickkennedy3168]

I'm only getting one coil to come on. I have a double in top and only one stain is burning I'm lost

[@davidaustin9009]

Great tutorial as usually. Also superthanks for the related links for further info.. Cheers Mate..

[@TaddyDigest]

My pleasure!

[@fawnhughes3678]

Would these being bad cause wires to melt and blower to run constantly, then it wouldn't start then it went back to running normal then came home to electrical burning smell

[@TaddyDigest]

yes

[@kevinravenklarson1969]

My heater is warm when I walk by every time even when its turned off at the thermostat and it was warm outside so it didn't turn on all day yet its hot when I walk by it so I turned it off at the breaker box is this normal or is something wrong with it?

[@TaddyDigest]

something wrong for sure

[@ramycstro6139]

U r good and when good I mean it boos

[@TaddyDigest]

Thank you my brother

[@yodamanrulz176]

After watching many of these sort of HVAC videos, it has occurred to me that when the purveyor of the video is pointing at something I question why not use your elbow to point at something and in that you are blocking much of the view with your finger. Perhaps a chopstick for pointing would less clutter the view. Please used Clear view of part numbers and boxes with enough time to screenshot the part number data.

[@TaddyDigest]

Thank you for this advice I will get a chopstick

[@CICLO-FRIO-HVAC]

The same thing happened to me, the blower did not stop and I replaced the sequencer, but the sequencer failed again after 30 days, why? Thanks

[@TaddyDigest]

check heater amps while running It may be to much for sequencer rating

[@keithmoore3908]

What if you don't have heat sequence ,what can be used in the replacement

[@TaddyDigest]

A contactor could be used in the place

[@aaronburke2469]

Where did you get that book? Amazon has it for $400. Wtf lol

[@TaddyDigest]

I ordered mine from the school I attended

[@mhawkfish2178]

Awesome info thanks

[@TaddyDigest]

Glad it was helpful!

[@TonyRodriguez-ok2ix]

sequencers go bad

[@jimdavis6833]

Back off. You are too close to the camera.

[@jamesscammahornjr.8538]

Thank you for the information. Your video was real helpful explaining what my Coleman EB20B just did two nights ago. My MFH is a 2016 model with a A.C. on tope then blower with the furnace on bottom. Up late finishing a HG Gundam I heard a pop and then popping sound. It was only a few seconds to see the smoke and get the fire extinguisher. Not enough to set my fire alarm off thou . I had to replace the limit switch on both heat elements last year.. When one blow so I replaced all of then . At that time, I cleaned it up and blow out the dust. I am lucky I did , because when the sequencer popped it made a mess of it . I will try and get a clip of some pics for you. With all the wiring in the way of the blower. I didn't get it as clean it as I liked. WOW ten years of build up. I had to brake it down to get it all and it's two pounds litter now. The parts will run about $280 for the sequencer ($80) and two breakers ($75 to $110) to replace . As for the wiring between the old pics from last time, and your video, plus a wiring diagram. I feel a little better about fixing it. There was only 4 or 5 wires that are ok. The rest didn't give me much to go by. sorry for the long story , but you have helped me out. Be safe out there and have a good one.