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Need help with a Carrier blower motor

Started by ducatiz, August 20, 2011, 01:38:51 PM

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ducatiz

August 20, 2011, 01:38:51 PM
They quoted me $1050 to get it replaced.  I can do it myself, I've done them before..

It's an ECM controlled GE 3/4 hp motor, ECM has the model DG02 0208FL.  Carrier furnace model is 58MVP120.

Anyone?


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"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

ducpainter

#1
August 21, 2011, 05:05:58 PM Last Edit: August 21, 2011, 05:09:59 PM by ducpainter
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
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    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


mitt

#2
August 21, 2011, 07:06:05 PM
grainger.com has a good supplier of furnace blower motors.

mitt

ducatiz

#3
August 22, 2011, 07:14:59 AM
Thanks to you both.

I was up late poking around and removed the blower and ECM and got the part numbers.

Retail for the blower motor alone is $1000.  I found one for $299.  The ECM's retail is $400 and I got one for $200.

Anyhow, I tested the blower motor by putting power directly into the leads from the ECM and voila, it blows just fine.  Nothing like having 3/4hp motor in your face. 

So now I'm down from a $1000 repair to a $200 one.

What really irked me was the guy didn't even bother to test the blower motor.  He plugged power into the ECM unit and said the blower was dead.  I took the ECM off and there was a clear fusible link that had blown.  If I lived alone, with no kids in the house, I probably would take the time and fix it.. it's probably a $2-4 link, but that would take time and I don't have that much.

However, I can order the damn thing for 200 and put it in tomorrow.

After I put the ecm on, I'm going to call the service co that came out and ask for my money back.  Utterly useless.  He tried to say we shouldn't bother putting in a new blower motor and should buy a new system whih would run 5-10 grand and not to fix it.

I did the math -- here is all that's in that cabinet and the prices retail:

- blower motor - 800
- ecm -400
- control board - 400
- inductor fan (for HE heat air supply) $650
- freon coils 300
- gas burners/jets - 200

so the entire system's guts are about 2750 if i replace everything at retail.

the burners never wear out, and the coils don't either, or at least they don't if hte fan is blowing. 

everything else i can replace myself.  why should i buy a new system again? 

Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

77south

#4
August 22, 2011, 07:35:38 AM
Because the HVAC contractor needs to make the next payment on his bass boat?

ducatiz

#5
August 22, 2011, 07:38:15 AM
Quote from: 77south on August 22, 2011, 07:35:38 AM
Because the HVAC contractor needs to make the next payment on his bass boat?

I'm not going to put down competent contractors.  I am just irritated that he didn't bother to remove the ecm from the fan (two screws = 1 minute) and test the fan directly.  I put a battery and lead wires to it just to see if it would turn on, and it did right away.  It turns with no noise at all -- the bearings are probably just fine. 

I called around and found it was a common problem on this unit -- the ecm blowing.  Solution is to put a surge suppressor on the circuit for it.  GE put one inside the unit, but made it non-servicable. 
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

MikeZ

#6
August 22, 2011, 08:06:38 AM
I run a commercial HVAC company in Baltimore MD.
Those ECM's are very sensitive and go up easily during electrical storms.  Good luck finding a reputable residential company.  They are few and far between.
If you have other questions though feel free to PM me.
 
'03 M1000Sie (in need of a bath), '71 Honda CB500 (the Project), '10 Tiger (the tourer)

ducatiz

#7
August 22, 2011, 08:12:55 AM Last Edit: August 22, 2011, 08:35:00 AM by ducatiz
Quote from: MikeZ on August 22, 2011, 08:06:38 AM
I run a commercial HVAC company in Baltimore MD.
Those ECM's are very sensitive and go up easily during electrical storms.  Good luck finding a reputable residential company.  They are few and far between.
If you have other questions though feel free to PM me.
 

Thanks for the advice.  I found a website forum and a self-described Carrier pro said that Carrier or GE should have put a surge breaker on the unit and he puts a $20 surge protector inline for the power when he replaces them.  I've already looked into a service box protector for it. 

I'm replacing it myself.  It's ridiculous how much this stuff costs + labor.  It just isn't that complicated.  Not that I mind paying when someone is doing the work, but to shit in a bucket and tell me it's Shinola, forget it.
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.
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