This picture is at the start of unit W

W unit at

W unit when runs

W unit showing Unknown

After fiddling with thermostat for few hours and re-starting the unit few times (because kept in shutting off on me), the whole power on the system shut off with no light on the thermostat. Most likely the 10A fuse on the controller board inside the handler is burned (it happened before), and I decided to call a Carrier specialist to look into this ongoing problem and will feed

The line voltages are high. You should have it checked. The lack of no air flow has caused the coil to freeze. I think the Carrier Infinity measures actual air flow. A static pressure check occurs everday at 1pm.

Not sure about the line voltages, I will check. But the system does not freeze, it is very clean and dry inside. The system was off for few days before doing the troubleshooting, therefore is not a chance was frozen when restarted it.

"I decided to call a Carrier specialist to look into this ongoing problem and will feed"

What an original idea!

It's unfortunate that your local HVAC service companies can't diagnose and remedy the problem. At least you're avoiding the financial consequences of them replacing various components in an effort to make the problem go away. Please be sure to report the manufacturer's recommendations back to the HVAC service company that wanted to replace ductwork in a system that operated acceptably since 2008. They're obviously clueless. I think they owe you a refund for anything they charged you due to their poor troubleshooting ability.

"I decided to call a Carrier specialist to look into this ongoing problem and will feed"

What an original idea!

---------

If I were to guess what a Carrier specialist is going to say from a time period in which that Carrier specialist might be close to losing dealer status because they haven't been moving enough equipment.

Hey we can't get this or that -- this unit is too old, You need to replace... EVERYTHING.

The day you realize what jobs Carrier Specialists actually perform on older equipment. It's not likely to be a fix on a 14 year old unit.

This scenario plays out a multitude of ways from the guy who doesn't know versus the guy that might know --- but he's more worried about losing the ability of selling equipment than to really help you.

But when I step into the fray ---- it's only about my ego they say...... ha, ha, ha.

You're avoiding the financial consequences... not really. New equipment isn't cheap either.

Ray,

This thread shouldn't be confused with an opportunity for you to bloviate (you have your YouTube videos for that.) It's about helping the OP with a problem. Do you have any specific, actionable advice that would help them solve their problem?

Charles just stating known truths. Preparing the OP for the "likely" road ahead you might say.

How do you think I know what I know?

Oh that's right I am a Licensed HVAC contractor, not a builder. How many times in my career have I gone back behind someone else?

The infamous review that states verbatim what I already know. They wanted to replace everything for 30 Grand. I some how managed to fix it for a fraction of that?

It's only one review Ray, you got lucky. 28 year career.. Yeah I only got lucky once. The con job of the century says Charles the builder.

Read between the lines I say. I'm human too and enjoy a laugh in the morning.

Today the Carrier tech found the blower motor going backwards, therefore all the problems. His cost to replace it was $1,600. Doing my homework I found that this motor is ECM , and wonder if would be enough to just replace the ECM, not the whole motor. If the fan is rotating backwards that means the motor is good, but the controller is bad, isn't it?

Good job dadoes.

"dadoes

yesterday

Could also be the ECM (electronically commutated motor) blower motor (assuming that's what you have on a Carrier Infinity system) has gone bad and may be running in reverse. That happened on a Lennox system I had in the early 2000s."

I can't tell you if the motor or controller or both need to be replaced. What I can tell you is that you ought to get a refund on the "troubleshooting" by the other service "professionals" you paid for. Especially the yahoos who said the duct work needed to be replaced. Contact the owner of the HVAC service companies, let them know the recommendations their service tech made and the diagnosis of the Carrier tech. In my opinion, it would be worth refunding your money to avoid a bad google review.

"klem1: Good job dadoes."

That's impossible. I'm not a self-employed servicer with 25+ years of hands-on experience in battling and understanding the mysteries of the HVAC universe. Perhaps related to the theorem that a monkey given sufficient time with a typewriter will produce the complete works of Shakespeare? Folks, it happened on this here discussion board!

"Perhaps related to the theorem that a monkey given sufficient time with a typewriter will produce the complete works of Shakespeare?"

Call it what you like but it's still admirable that what you lack in formal training is more than overcome by determination. (:

This is the value of these forums. Homeowners sharing their experiences with other homeowners seeking help. The toughest problems are solved when several people get together and brain storm ideas.

I would think the tech could have first tried replacing the controller to see if that solved the problem. One of my blowers failed last year. Only the motor was replaced.

What is the static pressure reading now with the AC in the high stage?

mike_home, I have posted above three pictures of the thermostats ( I have two exact units in my house, E and W). The Static Pressure of 6.5 inches shown by the thermostat now is not real as Charles Ross Homes explained earlier.

When fixing something has been determined to do it without lifting a finger, leaving the confines of one house, leaving the confines of a forum board.

We'll all sit from our ivory towers and claim how great we are that we don't need to leave the confines of those towers. We'll tell you what is wrong with it from afar. That's a fix.

So the 1 time you guess what is wrong, but you go no farther than the guess?

ha, ha, ha. I only paint this picture to help you realize where you are. ha, ha, ha.

Yet you talk about my ego... ha, ha, ha.

Ray,

It appears that the OP's problem was diagnosed and will be remedied by mere mortals--none of which advertised a storied, many-splendored, self-celebrated 28-year career as a HVAC service tech nor their one favorite, much promoted, internet review.

The important distinction is that contributors to this thread--except for you--appear to have been genuinely interested in helping the OP solve their problem and made helpful suggestions.

Cristian,

I realize the static pressure reading of 6.5 was incorrect due to the motor blower running in the wrong direction. I was asking what is the static pressure reading after the motor is replaced. This would indicate if you have duct problems as the first HVAC tech suggested.

Big surprise today! This afternoon the Carrier guru replaced the blower motor with a brand new one, and we have the same problem, the blower runs backwards. The irony of the fact is that I am a highly specialized electro-mechanic engineer, and this issue pined me against the black board, if I could make a joke of this. How in the world two Carrier gurus can not find what the problem is?! I truly believe that most of today's electricians and mechanics do not know how to properly troubleshoot. They just replace parts until eventually the gadget is fixed.

Their concussion now is that the control board located beside the blower is defective, but they can not guarantee it. Only $ 1,900 for it. I told them to let me think overnite about it.

I wonder if there is a Carrier service anywhere that I could call and pay for someone to walk me through the troubleshooting procedure. That board should have several test points that I could measure with a voltmeter and hopefully the problem surfaces.

Hi, Christian,

Is it possible to swap out the control board with the one on the system serving the other side of your home? I realize this could put a good control board at risk is there is an underlying electrical problem, but it's an alternative to spending $1,900 with no guarantee it will fix the problem.

Cristian,

A Carrier Infinity troubleshooting guide does exist. It may be difficult to find the one for your model. A Carrier dealer would have access to the document. You can try searching for it. This an unusual problem so there is not guarantee this will be covered.

Well Charles my definition of help isn't whack-a-mole.

The guess turns out to not be help after all.

hmm -hm- hmm --- hmm -hm- hmm --- hmm -hm- hmm.

(the little tune in one's head before they get voted off the island of misfit toys.)

Jokes aside... you now know why I don't really like to play guessing games.

I service the Katy, Texas area... In person -- no whack-a-mole games.

I wonder if this board is plug-and-play, because the last tech had a spare with him, swapped it and did not work at all. Put the old one back and works, but same wrong rotation on the blower. I am going to call the motor manufacturer first (Genteq) and see if they can help with an explanation. I also wonder if the thermostat could be the problem. I really want to get into this know.

Austin Air Companies, do you have any advice beside being so negative about others help?

Thermostat isn't going to have any influence on fan direction. Thermostat is merely an elaborate "switch" to send a signal to the furnace to tell what parts to turn on or off.

Carrier Infinity is a communicating type system. So swapping a thermostat isn't going to be cheap either. (It's not like you can just put any thermostat on that system.)

Well, well, well........finally good news. With your help guys I fixed it myself.

Down to 28° C from 30, and still

Christian,

This is the troubleshooting guide for the Carrier 58MVC which is the one I own. See if there is anything which may help. I am busy at work and have not had time to do a search.

https://f01.justanswer.com/fAidDsBL/58mvc-01t.pdf

I have been on the phone with Carrier, which opened a phony case for me pretending they are trying to help, but telling me that Sansone AC is their best rep in FL. Does not matter what I have told Carrier CS for two hours, they blamed it on my 2008 old unit, my ignorance to try harder asking Sansone AC to fix the problem, but nothing at all to help me get my AC back, at least temporarily. Then I started calling ECM motor companies begging for technical help, and the third one was unbelievably helpful, Chris Grainger. He told me how to change the rotation on the ECM motor by swapping two wires, and it took me 15-20 min to have the blower rotating the right way!

And I found a board on ebay for $75 which I already purchased and can't wait to install it next week. I hope my AC is going to work until then!

Thank you guys, you are grate!

Thank you mike_home, I will keep the guide and most definitely try it if needed

Look how beautiful my "old, rusty and unmaintained" system works!

Cristian,

Great work! The rotation of a DC motor can be easily reversed by changing the polarity. I thought of this as a possible fix. But this begs the question why this is happening. At least you eliminated several expensive parts.

At this point I believe there is something wrong with the controller board situated beside the blower. Few months ago the fuse was blown and after replacing it I noticed that the unit has not been working like before. That's why I purchased the another board on ebay and hope is going to be plug-and-play, and of course be good, ha, . Otherwise the system works very well now, the way it is.

Mike, do you have the same thermostat as mine? I am trying to install the Carrier app on my phone and monitor it when away.

If anyone else could advice on this, please chip in.

Whit many anticipated thanks!

I have this thermostat. Unfortunately this is the first generation Infinity controlleR. It does not support WiFi. You could replace it with the latest generation but it is expensive.

Cristian want to thank you for posting the solution, it could help others when searching this site with similar troubles in the future.

I have a suggestion that with your formal training,you can decide for yourself. I've ended some repeat failures of boards by installing voltage spike and surge protection.

Last but possibly most important for homeowners as a whole,the matter of paying techs sent into the field by greedy contractors without training them first. The problem has always been around but is now rampant in not only HVAC but other fields. In many states the answer is small claims court. Each state adopts a set of rules but unlike district court, the vast majority favor the average citizen. By "favor", here's why. In my state the limit is $20k which is less than most lawyers charge,therefore parties rarely hire one nor are companies willing to tie up their corporate attorneys in small claims. Again unlike district court that forbids it, either party can be represented or be assisted by a third party that has no license to practice law,,,,as long as they are not paid to do so. That provision alone is huge for someone with a tight schedule or has a willing friend or family member better suited for it. In a situation like yours I would anticipate a contractor that made his home in shagnasty would ignore a letter of demand but scramble to settle out of court when they receive official notice of being sued. Here is a key point that Mr Shagnasty never took into consideration while ignoring requests to refund a customer's money. When he recieves notice of suit in addition to amount in line #1 amount in dispute,there's additional lines to be determined by the court of #2pain and suffereing #3general damages #4 punitive damages. Yep, old shagnasty figures if he's ever backed into a corner he will just refund the money and be done with it. Here's how one JP put it when a defendant whined that he shouldn't have to pay plaintive any more then plaintive offered to settle for in his letter of demand. "Sir,if you caught someone stealing tires off your car and you offered to forget about if he put them back but he ran away with the tires,when the police caught the guy do you think they should just make him bring the tires back and not go to jail?"

As long as people allow blood sucking contractors to leach the situation will only get worse. My Granddad took a different approach to those who wronged him. He would say "I'll break that *@#^$ from sucking eggs if he doesn't die from the beatings before learning his lesson."

klem1, I totally agree with you, and BTW I am like your Granddad, no joke!

Going back to my AC system, I am eager to evaluate every corner of it, because I can, and hopefully soon have it the way should be. My skills could easily be adjusted from teaching electronic design and troubleshooting in college back in Europe, to this AC system. So far I found some two left handed service guys intrusions in it. The latest I found last night was the replacement of the condenser fan motor, which was ECM, but the"specialized" AC service guy decided to install a regular motor, most likely because he had it into his truck and needed sold. At this point I am thinking that since then, about two years ago, that whole system on the W side of my house has not been working in tandem with the rest of my house because the cheap motor could not comunicate with the Infinity net. That is why that AC portion of my house has been having so many problems since. If I will come to any certain conclusion most definitely will feed back.

@CRISTIAN BIVOLAN,

With crappy service like you've experienced I have to ask, are you by any chance, located near Katy, TX?

Not even close, I am in

FL

Ah, closer than you think: the same IECC climate zone!

Just found another problem into the W side unit. The power went off for few minutes in my community and at the restart the thermostat has stopped at the checking stage waiting for someone to push the Continue button. The other thermostat went to the normal operating status. This could be a major problem if I'll be away for many days and the power has a glitch like today. And quite honest I don't feel like ever calling any Carrier related business.

Yeah I have alot to fear. ha, ha, ha.

People on this board tell you to:

Call a Carrier Dealer / Figure it out yourself / Don't call anyone

So now this guy has two jobs, maybe a third. When most people's homes I go to they can't even be bothered with changing a filter. ( So it doesn't apply to everyone. )

The power goes off and you have to become a technician yet again.

So are you the second / third or fourth owner to this house? There's likely more reasons why a truck stock motor made it onto a condenser in place of an ECM. Let's not talk about that? Let's assume it was crappy service. (builder logic)

It was crappy service? Either someone agreed to have it done, or they did it themselves just like you have done. Could have been home warranty repair as well.

Because I print truths, I'll be told I am being negative again or cast asside as having crappy service. Does any of that matter in a market I don't serve?

No. ( I learned a long time ago you won't please everyone and that's ok.) The people on this board will co-mingle with strangers they will never meet and give one another likes. I am not on this board for 2 or 3 likes here and there. (think bigger picture, Charles can't think like that.)

I could advertise and spend hundreds if not thousands of dollars on advertisements. But those advertisements would be small not enough room to spread out the rhetoric that is often dished out here.

So I do my usual truth campaign, those that can read between the lines / live in my area have an extra choice to be made. HVAC contractors in my area are as plentiful as sunshine. You have many, many choices. I can't service everyone.

If you were selling a house and your condenser motor went out the contractor gave you a choice and the ECM was going to cost hundreds more? Let's not think about that... too obvious. Many of the choices one makes is directly tied to money. Even the OP on this thread. (money, money, money)

I am looking for the few, the happy, the soon to be comfortable.

This rubs the builder and sometimes others the wrong way. (They're not comfortable quite often)

I service the Katy, Texas area.

Carry on, caped crusader. For truth, justice, and the Raymerican way!