Originally Posted by Glennhvac
I've seen similar devices installed on air source equipment.
“I am for doing good to the poor, but...I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it. I observed...that the more public provisions were made for the poor, the less they provided for themselves, and of course became poorer. And, on the contrary, the less was done for them, the more they did for themselves, and became richer.”
― Benjamin Franklin
yep ,,, had 2 blow up today,,,, kinda messy...cheap fix though
it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair
I think it is manufacturers trying to push the edge of cheap to sell more. I also wonder if you were to tell a customer "yeah, the system costs twice as much, but its twice as good" if they would actually buy it. I've seen a lot of newer style capacitors that are bad and the old ones just keep on going. I've also seen a couple hard start kits that were bad like this one.
Also caught more fried contactors along with the wires leading to the compressor. Couldn't keep the 30 amps on the parts room shelf and had to use a 30 on a 25 in a couple pinches.
You know...no tech practicing or even alive for the most part has ever experienced temps and humidity conditions as we have this past season. At least not in my neck of the woods. And few had AC's back in the dust bowl days.
Bring back the good ole PCB's. ....on second thought, this is great!!! $$$
I had 3 of those this week and it's not even hot anymore.
Originally Posted by Baycienda
Had this one the other day. Worst one I've come across. Goodman Unit
Got the same problem here on commercial equipment as well. I have replaced many on a 1 HP 460 volt single phase motor which are common to use a run cap rated for 25 MFD. Got a service bulletin from Trane: RT-SVB 78A-EN which stated if the capacitor had a degraded performance of 10 % or more, that it must be replaced. So at 22.5 MFD it is no longer holding its charge and must be replaced. Trane is now stocking GE run caps which are suppose to be better.
So now on most calls I am checking and replacing them even if they are reading 23.5 MFD. This may be an indication that they are leaking and will soon fail. I have also found that if any lower than 22.5 MFD that the motor runs very hot which will lead to eventual winding/motor failure.
I have also found that the output of a good run cap has a higher RLA than actual motor RLA. For example if it were rated at say 2.7 RLA the out put of the run cap is running over 3.2 amps. But I have not established any true correlation yet.
I have also checked line voltage and its true that the power supply is low. a 460 volt unit is capable of running at a low 440 volts. So if you complain to the power company they will respond to the fact that the unit is rated to run at such a low power/line voltage.
Trouble shooting is not part of the repair..................understand the symptoms and you will find a solution.
08-25-2012, 05:46 AM
Didn't read the whole thread. Our suppliers sell Mars2 in Bestech boxes. These are made in mexico and aren't too bad. Recently the color of the box lettering changed to a lighter shade of blue and inside those boxes are chinese caps. Those suck.
08-25-2012, 08:31 AM
I was just thinking this. I have replaced more caps this year than I think I have in the past 3 combined. But its been Mars, GE and Packard. The majority being Packard.
Originally Posted by Glennhvac
Some maybe due to the warmer temps. But I've also replaced quite a few that were only a few years old.
One other thing. We've been steady this summer. Not slammed, steady. So if it weren't for these cheap capacitors, I would have had as much work. Well between that and the cheap leaking A coils.
08-25-2012, 09:58 AM
wow. Had that one been hanging upside down it probably would have taken out the board.
Originally Posted by mh heating
I like these when hovering homeowners are right there. I get quiet, look at them directly with a serious but hesitant expression like I'm struggling with how to tell them very bad news. Just long enough for their lips to start quivering slightly and that deer in the head lights look creeps into their eyes: "What...OMG that looks awful..it's bad isn't it ($$$)?"
Sigh deeply one more time then smile: "Nah...just messy...probably have ya' going in twenty if all else is well..."
Ya' gotta break up the day somehow...
08-25-2012, 11:38 AM
I gotta remember that one, and give it a try the next blown cap I see!
Originally Posted by hurtinhvac